by otto van der brug u.s. geological survey water-resources
TRANSCRIPT
WATER RESOURCES OF KOSRAE, CAROLINE ISLANDS
By Otto van der Brug
U.S. GEOLOGICAL SURVEY
Water-Resources Investigations Report 83-4161
Prepared in cooperation with the
TRUST TERRITORY OF THE PACIFIC ISLANDS and the
STATE OF KOSRAE, FEDERATED STATES OF MICRONESIA
Honolulu, Hawai i
March 1984
UNITED STATES DEPARTMENT OF THE INTERIOR
WILLIAM P. CLARK, Secretary
GEOLOGICAL SURVEY
Dallas L. Peck, Director
For additional information
write to:
District Chief
U.S. Geological Survey, WRD
Room 6110, 300 Ala Moana Blvd.
Honolulu, Hawaii 96850
Copies of this report
may be purchased from:
Open-File Services Section
Western Distribution Branch
U.S. Geological Survey
Box 25^25, Federal Center
Denver, Colorado 80225
Telephone: [303] 234-5888
CONTENTS
PageAbstract - -- - - 1
I ntreduction -- - 2
Cooperation ------------ -------------- ______________ ____ __ 2
Purpose and scope ------------ ___________________ ________ _ 2
Geographic setting --------- ______ ________________________ 3
Historical development -- ------------------------------------ - 3
Populat ion --- ------ __-_-_-_-______-___---_-__--_ _______ £
Previous investigations ----------------------------------- - 7
Acknowledgments ____________ ____ ____ __ __ ______ 7
Cl imate -- 8
General - --------------------------------- ________ ____ ____ 8
Rainfall 8
Air temperatures --------------------- ______ ________________ -\-\
Evaporation -------------- ________ __________________________ ] -\
Water resources -- -------------------- ________ ______ _______ __ ]Zj
General 14
Surface water --------- ________________________ _________ __ -\i+
General 14
Streamflow characteristics ------------------ _________ ___ 19
Runoff/rainfall comparison ------- -------------- -- 19
Flow-duration curves --- -- -- ------ -- -- ------ 24
High-flow frequency curves ----- ___-___-----__-----_ 24
Low-flow frequency curves -- --- ------ ------ ----- 24
Correlation of partial record with continuous record ------ 35Water quality _-_-_______------_____-______---___--_ ________ 35
General 35
Surface-water quality ---- ________ ___ ________ __ 35
Water-resources development --- ----------------------- ----- ____ 4^
Summary ------- ______________ __________________ ______ __ ^5
t i i
CONTENTS
Page Hydrologic data - --- ^6
Rainfall records ---- ----- - _______ _ _____ _______ ___ ^9
Streamflow records ----------- --- _______________ ____________ 75
Gaging stations ---------- ________________________ _____ 75
Low-flow partial-record stations ------------------------ 111
Miscellaneous sites - -- - - 117
Water and air temperatures and instantaneous discharge --- ---- 119Water quality 133
References
ILLUSTRATIONS
Figure
1. Map showing location of Kosrae - - - ^
2. Photograph of the Island of Kosrae - - 5
3. Map showing location of rain gages - - - 10
k. Map showing locations of surface-water stations andmiscellaneous measurement sites _______________________ 16
5. Photograph of gaging station --------------------------------- 18
6. Illustration showing section of typical gaging station 18
7. Graph showing flow-duration curves of fourcontinuous-record stations ----------- -- _______ ____ 25
8-11. Graphs showing magnitudes and frequencies of highest mean
discharges for duration indicated of the following rivers:8. Mutunte River -- 26
9. Okat River 27
10. Malem River 28
11. Tofol River 29
12. Graph showing magnitudes and frequencies of annual and
instantaneous peak flows for four continuous-record stations - 30
IV
ILLUSTRATIONS
Figure Page
13-16. Graphs showing magnitude and frequency of lowest mean
discharges for duration indicated of the following rivers:
13. Mutunte River ----------------------------------------- 31
14. Okat River -- - 32
15- Malem River 33
16. Tofol River - 34
17-19. Graphs showing correlation between discharges of:
17. Tafuyat and Tofol Rivers - -- -- - 37
18. Innern and Tofol Rivers -------- ---------------------- 38
19. Pukusruk and Malem Rivers - - - 39
20. Map showing location of water-quality stations -- -------- --- 41
21-26. Photographs of the following rivers:
21. Mutunte River gaging station ------------------- --- 76
22. Okat River at gaging station ----- - -- --- 82
23. Palusrik River at gaging station -------------- - --- 93
24. Palusrik River dam at gaging station -- ---- ------ 93
25. Malem River at gaging station - 97
26. Tofol River at gaging station ------- -------- -_ 1Q4
TABLES
Table Page1. Rainfall records of Kosrae -------------- ----------------- g
2. Monthly mean, minimum and maximum rainfall at Lelu ------ --- 12
3. Mean monthly and annual air temperatures at Lelu ------ ----- 13
4. List of surface-water stations ------------------------------- 15
5. Average monthly mean discharge in cubic feet per second
and in percent of annual total ----- ------------------- 20
6. List of available annual rainfall totals since 1972 --- ----- 21
7. Runoff/rainfall comparisons ---------------------------------- 23
8. Correlation between discharges at low-flow partial-
record and continuous-record stations ------------------- 36
9. List of locations where chemical analyses of streamflow
were made ------- -------------------------------------- 40
10. World Health Organization drinking-water standards ----------- 43
11. German rainfall records -------------------------------------- 49
12. National Weather Service rainfall records at Lelu ------------ 50
13. Daily and cumulative rainfall readings at Mutunte River ------ 51
14. Cumulative rainfall readings at Okat River --- -------------- 56
15. Cumulative rainfall readings at Melo River ------------------- 58
16. Cumulative rainfall readings at Palusrik River --------------- 60
17. Daily and cumulative rainfall readings at Malem River - - 61
18. Cumulative rainfall readings at Tofol River ------------ -- 67
19» Daily rainfall readings at Sansruk ------------------------- 70
20. Daily rainfall at continuous-record rain gage at Srono ------- 73
21. Streamflow records for Mutunte River
A. Annual maximum discharge and peak
discharges above base -------------------------- 77
B. Annual minimum discharge ---------------------------- 78
C. Discharge measurements made at upstream diversion dam 78
D. Monthly and annual discharges --------------- ------ 79
VI
TABLES
Table Page
22. Streamflow records for Okat River
A. Discharge measurements made outside the
period of continuous discharge record 81
B. Annual maximum discharge and peakdischarges above base - -- ------ -- 83
C. Annual minimum discharge --- - ----- -- 84
D. Monthly and annual discharges -- -- -- - 85
23. Streamflow records for Melo River
A. Discharge measurements made outside the periodsof continuous discharge record ------ ------- 87
B. Annual maximum discharge and peakdischarges above base 88
C. Annual minimum discharge ---- ----- ------ -- 89
D. Monthly and annual discharges --- --- --- -- 90
24. Streamflow records for Palusrik River
A. Discharge measurements made outside the period ofcontinuous discharge record - - -- - --- 92
B. Annual maximum discharge and peakdischarges above base - - 94
C. Annual minimum discharge ---- ------------ - -- 94
D. Monthly and annual discharges 95
25. Streamflow records for Malem River
A. Discharge measurements made outside the periods ofcontinuous discharge record - 96
B. Annual maximum discharge and peakdischarges above base -- --- ---------- - 98
C. Annual minimum discharge -- --- -- - - - 100
D. Discharge measurements made above diversion dam 100 E. Monthly and annual discharges -- ------- ----- ioi
VI I
TABLES
Table Page
26. Streamflow records for Tofol River
A. Discharge measurements made outside the periods of
continuous discharge record - -------- ----- 103
B. Annual maximum discharge and peakdischarges above base ------------------- --- 105
C. Annual minimum discharge ----------------- --------- 107
D. Discharge measurements made at diversion dam ------ 108
E. Monthly and annual discharges --------------------- 109
27.-32. Discharge measurements:
27. Of Mwot River 111
28. Of Tafuyat River 112
29. Of Innem River -- 113
30. Of Pukusruk River 115
31. Of Yekula River 116
32. At miscellaneous sites - - - 117
33. Seepage investigation of Finkol River on March 6, 1983 118
34.-43. Water and air temperatures and instantaneous discharges at:
34. Mutunte River 119
35. Okat River 122
36. Melo River 124
37. Mwot and Walung Rivers 124
38. Palusrik River 125
39. Malem River 126
40. Tafuyat River 128
41. Tofol River 129
42. Innem River ----------------------- - ------- - 131
43. Pukusruk River 132
44. Water temperatures and instantaneous discharges at
Yekula River 132
VI I I
TABLES
Table Page
^5.-53. Chemical analyses of water from:^5. Mutunte River 133
^6. Okat River 13 2*
kl . Melo River 135
^8. Palusrik and Finkol Rivers 136
^9. Malem River 137
50. Tofol River 138
51. Low-flow partial-record stations --------------- -- 139
52. Mwot and Walung Rivers ----- -
53. Miscellaneous sources -
IX
CONVERSION TABLE
The following table may be used to convert measurements in the inch-pound
system to the International System of Units (SI).
Multiply By To obtain
Lengthinch (in) -- ---- 25.4 - millimeter (mm)
foot (ft) 0.3048 meter (m)
mile, statute (mi) - -- 1.609 - kilometer (km)
Area2 acre ---- -----__----__----__-- 4,047 -- square meter (m )
2 2 square foot (ft ) - 0.0929 square meter (m )
2 2 square mile (mi ) -- - 2.590 -- square kilometer (km )
Volume
acre-foot (acre-ft) -- 1,233 cubic meter (m )
cubic foot (ft 3 ) 0.02832 cubic meter (m3 )
gallon (gal) 3.785 liter (L)
million gallons (Mgal) 3,785 cubic meter (m )
Volume Per Unit Time (includes Flow)
3 3 cubic foot per second (ft /s) 0.02832 - cubic meter per second (m /s) 3
gallon per minute (gal/min) -- 0.06309 -- cubic decimeter per second (dm /s)
gallon per day (gal/d) -- --- 90.85 ---- cubic decimeter per second (dm /s)
million gallons per day (Mgal/d) 0.04381 -- cubic meter per second (m /s)
Miscellaneous
cubic foot per second per3 2 square mile [(ft /s)/mi ].
micromho per centimeter at
25° Celsius (ymho/cm at 25°C).
0.01093 - - cubic meter per second pero 2
square kilometer [(m /s)/km ].
1.000 ---- microsiemens per centimeter at
25° Celsius (viS/cm at 25°C).
DEFINITION OF TERMS
Water Resources
Acre-foot (acre-ft) is the quantity of water required to cover one acre to a depth of one foot and is equivalent to 43,560 cubic feet or 325,851 gallons.
Control designates a feature downstream from the gage that determines the stage- discharge relation at the gage. This feature may be a natural constriction of the channel, an artificial structure, or a uniform cross section over a long reach of the channel.
Cubic foot per second (ft^/s) is the rate of discharge representing a volume of one cubic foot passing a given point during one second and is equivalent to 7-48 gallons per second or 448.8 gallons per minute.
Cubic feet per second-day (ft /s-d) is the volume of water represented by a flow of one cubic foot per second for 24 hours. It is equivalent to 86,400 cubic feet, 1.9835 acre-feet, or 646,317 gallons.
Discharge is the volume of water that passes a given point within a given period of time.
Mean discharge (mean) is the arithmetic average of individual daily mean discharges during a specified period.
Instantaneous discharge is the discharge at a particular instant of time. If this discharge is reported instead of the daily mean, the heading of the discharge column in the table is "Discharge".
Pi ssolved is that material in a representative water sample which passes through a 0.45-ym membrane filter.
Drainage area of a stream at a specific location is that area, measured in a horizontal plane, enclosed by a topographic divide from which direct surface runoff from precipitation normally drains by gravity into the river above the specified point.
Gage height is the water-surface elevation referred to some arbitrary gage datum.
Gaging station is a particular site on a stream where systematic observations of hydrologic data are obtained.
Hardness of water is a physical-chemical characteristic that is commonly recognized by the increased quantity of soap required to produce lather, due to the presence of alkaline earths (principally calcium and magnesium) and is expressed as equivalent calcium carbonate (CaCO^)«
Hicrograms per liter (yg/L) is a unit expressing the concentration of chemical constituents in solution as mass (micrograms) of solute per unit volume (liter) of water. One thousand micrograms per liter is equivalent to one mi 11igram per 1i ter.
xi
Milligrams per 1i ter (mg/L) is a unit expressing the concentration of chemical constituents in solution as mass (milligrams) of solute per unit volume (1i ter) of water.
Partial-record station is a particular site where limited streamflow and/or water-quality data are collected systematically over a period of years for use in hydrologic analyses.
Recurrence interval is the average interval of time within which an event will be equaled or exceeded once.
Runoff in inches shows the depth to which the drainage area would be covered if all the runoff for a given time period were uniformly distributed on it.
Sediment is solid material that originates mostly from disintegrated rocks and is transported by, suspended in, or deposited from water; it includes chemical and biochemical precipitates and decomposed organic material, such as humus. The quantity, characteristics, and cause of the occurrence of sediment in streams are influenced by environmental factors. Some major factors are degree of slope, length of slope, soil characteristics, land usage, and quantity and intensity of precipitation.
Specific conductance is a measure of the ability of water to conduct an electrical current. It is expressed in micromhos per centimeter at 25 C. Specific conductance is related to the type and concentration of ions in solution and can be used for approximating the dissolved-solids content of the water. Commonly, the concentration of dissolved solids (in milligrams per liter) is about 65 percent of the specific conductance (in micromhos). This relation is not constant from stream to stream, and it may vary in the same source with changes in the composition of the water.
Stage is the water-surface altitude referred to some arbitrary gage datum (gage he ight).
Stage-discharge relation is the relation between gage height (stage) and volume of water per unit of time, flowing in a channel.
Streamf1ow is the discharge that occurs in a natural channel. Although the term "discharge" can be applied to the flow of a canal, the word "streamflow" uniquely describes the discharge in a surface stream course. The term "streamflow" is more general than "runoff" as streamflow may be applied to discharge whether or not it is affected by diversion or regulation.
XI I
WATER RESOURCES OF KOSRAE, CAROLINE ISLANDS
By Otto van der Brug
ABSTRACT
Kosrae is a volcanic island about 42 square miles in area and is the
easternmost of the Caroline Islands. Mount Finkol (Mt. Crozer), at 2,065 feet,
is the highest point on the island. Mountainous ridges descend sharply to narrow
coastal strips that support a population of 5,500 people. Many streams, some
quite large relative to the size of the island, drain radially from the interior.
The average discharge of surface water amounts to 7 million gallons per square
mi 1e per day.
Annual rainfall for coastal areas on Kosrae averages about 200 inches and is
similar to the rainfall for coastal areas on the island of Ponape, about 3^0
statute miles to the northwest. Rainfall in the interior was estimated at 225
inches per year, of which about two thirds runs off as streamflow.
Surface-water quality is very good as shown by 42 chemical analyses of water
from 12 streams.
This report summarizes in one volume the hydrologic data collected and
provides interpretations that can be used by planning and public works officials
as a basis for making decisions on the development and management of their water
resources.
INTRODUCTION
Cooperat ion
In 1968, the Water Resources Division of the U.S. Geological Survey and the
Trust Territory of the Pacific Islands signed a joint-funding agreement to syste
matically collect water-resources data throughout most of the Trust Territory.
Under this program, the Trust Territory agreed to provide labor, equipment,
services, and funds to be matched on an equal-value basis by the Geological
Survey. The Survey assumed responsibility for supervision, data compilation and
analyses, and publication. The program was expanded in 1979 with the collection
of streamflow samples for chemical analyses.
In 1981, after the formation of the Federated States of Micronesia, the
responsibility for the matching funds and services was transferred from the Trust
Territory Government to the separate states.
Purpose and Scope
Since 1968, the Geological Survey has systematically collected water-
resources information on the major islands in the Trust Territory of the Pacific
Islands. Initially, these data consisted of records of discharge and stage of
the major streams, but were gradually expanded to include rainfall records,
water-quality data, and, on some of the islands, ground-water information.
This report has two purposes: first, to provide a summary of available
water-resources information for Kosrae, and second, to analyze this information
so that the data will be usable for future planning, development, and management
of the surface-water resources.
The continuous record of gaging stations is used to derive flow-duration
curves and frequency analyses. Low-flow measurements are used to estimate the
potential yield of basins, rainfal1-runoff relationships serve as indicators of
surface-water supply, and the quality of the water is assessed.
Geographic Setting
Kosrae, the easternmost of the Caroline Islands, is located between lat 5°16
and 5°23' N. and long 162°55' and 163°03' E., almost at equal air distances, in
statute miles, from Honolulu (2,^80 mi), Sydney (2,500 mi), and Manila
(2,550 mi), and about 2,230 miles southeast of Tokyo (fig. 1).fy
The island is k2 mi (square miles) in area, nearly circular in shape, and
covered with lush, tropical vegetation (fig. 2). The mountainous interior has
one of the highest peaks in the western Pacific, Mount Finkol, which is 2,065
feet high. The mountains have sharp ridges and steep slopes with ridge flanks
descending sharply into a narrow coastal strip. Mangrove swamps border much of
the coast 1ine.
Rainfall averages about 200 inches per year on the coast and is higher in
the interior. The climate is uniformly warm and humid.
Rivers, some quite large in relation to the size of the island, radiate out
from the interior in all directions and are perennial.
Residents of the island live principally on the narrow coastal strip and on
the small island of Lelu on the eastern coast, which is connected to Kosrae by a
causeway. About one-third of the total population of 5,500 lives on Lelu, which
is the administrative and commercial center of the island.
Historical Development
The first Westerner to sight Kosrae was the Spanish explorer Saavedra on
September 1^4, 1529, and the first person known to have landed on the island was
the French explorer, Duperry, who stayed in Kosrae from June 5 to 15? 182^4. He
estimated the population to be about 2,000 (Wilson, 1970).
Visits by whaling ships became significant in the 1830's and peaked during
1852-56, when 75 whaling ships stopped at Kosrae. Sometime in 1852, Protestant
missionaries arrived from Honolulu (Wilson, 1970).
Although generally considered to be in the Spanish sphere of interest, Spain
showed little interest in the Caroline Islands until Germany tried to claim these
islands in 1885 by raising its flag on several islands including Kosrae. The
following year, Pope Leo XIII settled the dispute between Germany and Spain in
favor of Spain which ruled the island from 1886-1899. No attempt was made by
Spain to govern internal affairs (Wilson, 1970).
120* 15O° 180° 150° 120°
0 WOO 2^000 3,000 KILOMETERS SCALE AT EQUATOR
Note: All distances are in statute mi les (one statute mile is 0868 nautical mile).
Figure 1. Location of Kosrae.
Figure 2. The island of Kosrae (viewed from the north)
All of the Caroline Islands were purchased by Germany in 1899 The German
Administration lasted until 1914 when the Japanese occupied the islands after the
outbreak of World War I. In 1920, Japan was given a mandate to administer the
islands by the League of Nations. After withdrawing from the League in 1935,
Japan annexed the islands as part of its empire. The United States became the
administrator of Kosrae following the end of World War II in 1945- Under terms
of the United Nations' charter, the island remains under American Administration
until its impending independence as one of the Federated States of Micronesia.
Populat ion
Kosrae has a population of 5,522, according to the 1980 U.S. census (The New
Pacific Magazine, July, August 1981). This total is an increase of 38 percent
since 1973- Since 1967, tne annual rate of growth has been almost 4 percent. The
population is young with 62 percent of the population under the age of 20 (Kosrae
census, 1973). The population density in 1980 was 131 inhabitants per square
mile, which is low compared to the total Micronesian density of 180 per square
mi 1e.
The only town is Lelu on the small island of the same name, where a third of
the population resides. This percentage of the total is the same as reported by
Snow in i860 (Hawaii Architects and Engineers, 1968). The remaining two-thirds
live in scattered villages along the coast. The only employment of any conse
quence is with the Government and many youths have difficulty finding jobs.
Kosrae is the only large island in the western Pacific with a Protestant popula
tion and the church plays an important role in the community.
Estimates and census results show a decrease in population during the 19th
century and an increase in the 20th. The following data compiled from several
sources show the historical population trends.
1824 About 2,000, estimate by Duperry (Wilson, 1970)
1859 748, count by missionary, B. G. Snow, the first fully reliable
figure (Hawaii Architects and Engineers, 1968)
1891 125 (Yanaihara, 1940)
1913 643 (Hawaii Architects and Engineers, 1968)
1933 1,103 (U.S. Navy, Hydrographic Office, 1938)
1945-46 1,555, U.S. Military Government census (Bryan, 1946)
1967 3,260, Trust Territory census (U.S. Department of State, 1967)
1980 5,522, U.S. census (The New Pacific Magazine, July, August 1981).
Previous Investigations
With the exception of rainfall records, no information on water resources
could be located from the Spanish, German, and Japanese Administrations.
Prior to the construction of gaging stations by the Geological Survey in
1971) only one investigation had been made. Piper (19^6-47) visited the island
for 6 hours and made a few observations. He estimated the flow of the Innem River
to be 5 ft /s (cubic feet per second) and noticed that the people obtained water
from rain catchments.
Acknowledgments
Throughout the years, assistance from Headquarters Staff of the Trust
Territory of the Pacific Islands in Saipan and officials on Kosrae has been
outstanding. Special acknowledgments are made to Koichi L. Wong and Louis F.
Irving, who were involved in the program on Kosrae, beginning with the reconnais
sance for gaging-station locations.
Local personnel who conducted almost all the field investigations were:
Sukuo Langu 1972-76
Ichiro Tosie 1971-72, 1976-83.
CLIMATE
General
Kosrae lies near the Equator in an immense ocean and the climate is thus
invariably warm and humid. The island has one of the wettest coastal regions in
the world and has an annual rainfall of about 200 inches at Lelu.
Air temperatures are uniform with less than one-half degree Celsius varia
tion in monthly means (27.2° to 27.6°C). No relative humidity data have been
published but it is safe to assume that they are similar to those for Ponape
where the average is 84.5 percent.
There have been no typhoons on Kosrae in recent years. Sometime between
1837 and 1852, a typhoon referred to as the "dark" typhoon struck Kosrae, and the
typhoon of March 3-4, 1891, destroyed six houses (Wilson, 1970).
Rainfal1
Rainfall records have been collected at various locations on Kosrae since
1895; however, the records are incomplete except for short periods during the
German, Japanese, and United States Administration (table 1). During the German
Administration, rainfall records were collected (1895, 1899-1904) at the
American Mission at Mwot on the western side of the island and at Lelu (1903-12)
on the eastern side. The Japanese recorded the rainfall at Lelu only during
1932-34, and these records were not available. Under United States
Administration, the National Oceanic and Atmospheric Administration published
rainfall records at Lelu for most of the months during 1954-1978. Since 1971,
the U.S. Geological Survey has collected records at various locations on the
island. Daily readings were made by observers for a few years at some of the
locations but most were cumulative totals read once or twice monthly (fig. 3).
In June 1982, the U.S. Geological Survey established a continuous-record rain
gage in the center of the island at an altitude of 330 ft.
Rainfall records have been collected at Lelu since 1903 but only 14 years
have complete records. The average annual rainfall at this site for the 14 years
is 206 inches. Comparison of 16 months of concurrent records collected on the
western and eastern side of the island during the German Administration, indicate
that rainfall at Mwot was 50 percent higher than at Lelu.
8
Tabl
e 1.
Rain
fall
re
cord
s of
Kosrae
Location
Mwot
Lelu
Lelu
Lelu
Mutunte
Rive
r
Okat Ri
ver
Melo
Riv
er
Palu
srik
Ri
ver
Male
m Ri
ver
Tofo
l Ri
ver
Sans
ruk
Srono
Lat
i tud
e north
5°19'
5°20'
5°20'
5°20'
5°21
'5*»
"
5019
'18"
5°20'32"
5°16
'36"
5017
'13"
5°19
'09n
5°19'10"
5°19'*»3"
Long! tu
de
east
162°59'
163°05'
163°02'
163°OT
1620
59'15"
162°58'1V'
1620
58'33"
162°59'08"
163°01'28"
1630
00'22"
163°
OT31
"
162059'33"
Altitude
(ft) -- 7 20 5 20 10 10 100 5
330
Peri
od of
record
1895-190**
1903
-13
1932-3**
195*»-78
1971
-72,
19
7*»
1977-81
1972
-76
197^-81
1971-73
1971-7**
1978
-81
1971-81
Sept
. 19
71-
Dec. 19
73.
June 1982-
May
1983.
Source
German
do.
Japanese
U.S.
We
athe
rService.
U.S. Geological
Surv
ey.
do.
do.
do.
do.
do.
do.
do.
do.
do.
Frequency
of re
adin
g (most
mont
hs)
-- -- --
Hour
ly
Dai ly
Twice
mont
hly
Monthly
Monthly
Twice
monthly
Dai ly
Twice
monthly
Twice
monthly
Daily
Cont
inuo
us
Diameter
can
(in) -- -- 8 6 6 6 6 6 6 6 6 6 8
N.
162°
55'
162°
57'
30"
163°
00'
KO
SRA
ECA
ROLIN
E IS
LAND
S
Pt.
F
inau
np
es
2 M
iles
2 K
ilom
eter
s
E
D
EX
PL
AN
AT
ION
Ger
man
ra
in
gag
e
Jap
anes
e ra
in g
age
Nat
ion
al
We
ath
er
Se
rvic
e
rain
g
age
U.S
. G
eo
log
ica
l S
urv
ey
rain
g
age
Pt.
S
ao
ksa
5°
20'
5°
17'
30
"
162°
55'
162
57'3
0"
163°
OO
Bas
e fr
om
T
rus
t T
err
ito
ry
of
the
Pacif
ic
Isla
nd
s.
Ko
sra
e,
19
76
, S
ca
le
1:1
0,0
00
.Fi
gure
3.
Location of
rain
gage
s
Table 2 lists the mean of all the recorded monthly totals at Lelu along with
the maximum and minimum monthly rainfall. The total of the monthly means is
200.59 inches. Rainfall is distributed fairly uniformly throughout the year,
ranging from 6.3 percent of the normal rainfall in October to 10.8 percent in
April. April is clearly the wettest month of the year with the highest minimum
total (10.59 inches) and the highest maximum total (53-19 inches).
All available rainfall records are listed in the Hydrologic Data section
(tables 11-20).
Air Temperatures
The monthly and annual mean temperatures available at Lelu for 1956-78 are
listed in table 3. Averages of the monthly means have very small variations
(1/2 C) but the means for a same month can vary as much as 4 C. The highest
temperature reported was 36 C on September ^4, 1968, and lowest was 11 C on
November 3, 1971. The lowest temperature is believed to be incorrect because
temperatures on nearby islands were reported to be 2k C or higher on that day.
Readings of air temperatures have been made at times during measurements of
stream discharges, and are listed in conjunction with water temperatures in the
Hydrologic Data section.
Evaporation
No pan-evaporation data have been collected on Kosrae. The nearest island
for which evaporation data are available is Guam where the mean of 21 annual
totals during 1956-81 is 76.76 inches. Because rainfall on Kosrae is twice that
of Guam, the Guam evaporation rate should be too high for Kosrae, where the rate
should resemble more closely that of another exceedingly wet coastal area--Hilo,
Hawaii. Here, the mean of 11 annual totals (1956-60, 1962-67) is 66.22 inches
(U.S. National Oceanic and Atmospheric Administration, 1956-67, v. 1-12).
11
Tabl
e 2.
Mo
nthl
y mean,
minimum
and
maxi
mum
rainfall.in
inches,
at Le
lu
[190
3-12
, 1954-78]
Numb
er
of years
Mean
Perc
ent
Mini
mum
Year
Maximum
Year
Jan. 27
14.3
9 7.2
3.51
1973
37.5
1 19
62
Feb. 29
16.3
5 8.
1
3.97
19
70
38.6
7 1959
Mar. 30
18.67
9.3
3.93
1970
3^.3
8 1959
Apr. 26
21.6
6 10.8
10.5
9 1978
53.19
1960
May 26
18.80
9.4
7.71
19
70
43.95
1958
June 27
17.86
8.9
8.08
1973
37-75
1958
July 28
16.0
3 8.0
8.62
19
60
38.04
1957
Aug. 32
15.00
7.5
5.08
1969
34.37
1963
Sept.
29
14.39
7.2
5.22
1969
33.65
1957
Oct. 26
12.7
3 6.3
6.26
1969
20.46
1958
Nov. 29
14.8
3 7.
4
7.10
1975
26.38
1957
Dec. 29
19.88
9.9
5.28
1904
40.8
8 19
59
Annual
200.
59
100 3-
51
1973
53.1
9 19
60
Table 3. Mean monthly and annual air temperatures at Lelu
[Publ ished by National Oceanic and Atmospheric Administration
converted to degrees Celsius]
in degrees Fahrenheit;
Annual
Year
1956
1957
1958
1959
I960
1961
1962
1963
196*1
1965
1966
1967
1968
1969
1970
19711972
1973
1974
1975
1976
1977
1978
Mean
Number
Jan.
27.6
27. 4
27.2
27.2
26.8
26.3
26.6
26.7
28.5
27.8
28.7
28.1
27-5
30.1
26.2
26.9
27.6
28.2
28. 4
27.4
27.6
20
Feb.
27.9
27.1
26.7
26.9
26.6
26. 4
26.5--
29.1
27.6
28.1
27.8
27.4
27.6
26.1
27.8
28.0
28.1
27.6
27.4
18
Mar.
28.3
26.7
26.8
26.8
26.4
26.5
26.6
26.8
28.2
27.7
28.0
27.9
27.9
26.9
26.7
27.1
27.3
27.4
27.6
27.3
19
Apr.
27-9
27.0
27.4
26.9
26.6
26.6
26.5
26.7
26.5
28.1
26.9
28.0
27.8
27.5
29.927.2
26.8
27.4
27.8
27.3
26.9
27.3
21
May
27.9
27.3
26.8
26.8
26.5
26.8
26.6
26.7
26.7
26.728.6
27.7
28.2
28.2
27.4
27.9
27.3
27.6
26.8
27.6
27.3
20
June
27.2
27.6
27.1
27.1
26.7
26.8
26.7
26.6
26.7
26.8
28.8
27.7
27.6
27.7
27.1
27.8
28.0
27.3
27.7
26.1
27.4
27.6
27.3
22
July
27.7
27.3
27.4
27.0
26.8
27.0
26.4
26.6
26.7
26.7
28.2
27.9
28.1
27.3
27.9
27.7
26.9
27.4
26.4
27.2
19
Aug.
27-4
27-3
27.4
27.1
26.9
26.9
26.6
26.5
26.6
28.5
27.7
28.4
27.7
27.9
27.727.8
27.1
27.2
27.1
27.5
28.2
27.4
21
Sept.
27.6
27.2
27.4
27.0
26.7
27.0
26.4
26.7
26.4
28.4
28.1
28.4
27.7
27.8
26.7
26.9
27.4
27.6
27.318
Oct.
27.3
27.4
27.4
27-0
26.9
26.9
26.6
26.7
28.0
28.6
27.9
28.8
27.9
28.3
25.7~
26.8
27.4
27.3
28.2
28.2
27.5
20
Nov.
27.3
27.2
27.1
26.7
26.8
26.3
26.7
26.6
27.9
28.6
28.4
28.4
28.1
28.4
25.6
27-5
27.7
27.5
28.0
27.7
27.4
20
Dec.
27.2
27.2
27.3
26.5
26.7
26.5
26.4
26.7
27.2
28.1
28.9
28.6
27.1
30.1
26.9
26.0
27.5
27.2
27.9
27.6
27.4
20
Mean
27.2
26.9
26.8
26.7
26.6
26.6
27.2
28.5
27.8
28.3
27.8
27.4
27.4
Max.
33
32
3332--
31
31
31
34
34
36
34
33
34
33
Min.
21
21
23
23
21
21
23
22
21
22
21
18
11
17
18
16
21
16--
of years.
13
WATER RESOURCES
General
Water-resources records collected on Kosrae include data on surface water
and water quality. Surface-water data consist of daily discharges from conti
nuous-record stream-gaging stations, systematic measurements of discharge at
partial-record stations, and measurements of discharge at miscellaneous sites.
Data collection by the Geological Survey began in May 1971 with the construction
of five gaging stations and the establishment of two partial-record stations. As
a means of identification, station numbers have been assigned to each gaging
station, partial-record station, and location where water samples have been
collected. On Kosrae, station numbers were assigned in counterclockwise
sequence beginning in the center of north Kosrae.
Water-quality data include water-temperature readings and results of
chemical analyses from samples collected from 16 water sources.
No ground-water data have been collected on Kosrae.
Surface Water
General
Table 4 lists the continuous-record gaging stations and the low-flow
partial-record stations which have been operated by the Geological Survey since
1971 (fig. 4). In May and June of that year, five gaging stations were
established to collect streamflow information at existing and anticipated
sources of water supply. Low-flow partial-record stations were established to
augment data collected at gaging stations.
The gaging station on the Palusrik River was discontinued in September 1972.
Streamflow collection was no longer feasible after a dam had been built a few
feet downstream of the station to supply water for Utwa village (fig. 24,
Hydrologic Data section). In October 197^*> a gagi n9 station was established on
the Melo River, a possible source of water for the planned airport and dock area.
Tabl
eList of su
rfac
e-wa
ter
stations
Station
No.
16899500
16899600
16899620
16899670
16899680
16899690
16899700
16899750
16899780
16899800
16899830
1689
9850
16899900
Dra inage
area o
Stat
ion
name
(mi
)
Mutu
nte
River
Okat Ri
ver
Mel o
Rive
r
Mwot Ri
ver
Walung Ri
ver
Finkol Ri
ver
Palusrik River
Mal em R
iver
Tafuyat
Rive
r
Tofo
l Ri
ver
Inne
m Ri
ver
Pukusruk Ri
ver
Yeku
la Ri
ver
0.52
1.94 .68
79
.03
1.70 .45
.76
.27
.53
1.82 .27
.15
Lat
i tud
e
north
5°21
'45"
5°19'11"
5°20'30"
5°18
'26"
5°18'25"
5°17
'10"
5°16'32"
5°17
'35"
5°18'38"
5°19'09"
5°19
'49"
5°21'01"
5-21 »
Locat ion
Long
! tude
east
162°59'20"
162°58'19"
162°58'33"
162°
55'2
5"
162°55'01"
162°59'04"
162°59'13"
163°00'54"
163°
00'*
»7"
163°
00'2
2"
163°
00'2
7"
163°00'37"
163°00'16"
Altitude
(ft) <«6 13 20 50 65 25 100 95 95 98 10 175 15
Peri
od of re
cord
(water years)
May
1971-Septe
mber
19
82
July
19
71-S
epte
mber
19
82
Octo
ber
1974
-Sep
temb
er 1979,
June 19
80 to June 19
83.
1980-81
1980-81
1981
June 19
71-S
epte
mber
1972
July 1971-March 19
81,
Marc
h to
De
cemb
er 19
82.
1974
-75,
1977-81
June
19
71-S
epte
mber
19
79,
Marc
h 19
80 to
June 19
83.
1971-74, 19
78-8
1
1974-75, 1980-81
1971-74
Rema
rks
Cont
inuo
us record.
Do.
Do.
Low-
flow
partial
record
Mi seel
1 aneous.
Do.
Cont
inuo
us record.
Do.
Low-
flow
partial
record
Cont
inuo
us record.
Low-
flow
partial
record
Do.
Do.
Note:
Drai
nage
ar
eas
and
loca
tion
s (latitude, longitude, an
d al
titu
de)
diff
er fr
om th
ose
used in
"W
ater
Re
sour
ces
Data
for
Hawaii and
othe
r Pacific
Areas" 19
71-8
0.
These
had
been ba
sed
on the
I960 Army Ma
p Se
rvic
e 1:
50,0
00-s
cale
ma
p (International spheroid)
wher
eas
revised
figu
res
are
base
d on th
e 1974 Tr
ust
Territory
of th
e Pa
cifi
c Islands
1:10,000-scale m
ap (Clarke
spheroid of 18
66).
E.
16
2°5
7'3
O"
163°
00
'
N.
KO
SRA
ECA
ROLIN
E IS
LAND
S
Pt.
F
inau
np
es
2 M
iles
.899750
*899780
2 K
ilom
eter
s
EX
PL
AN
AT
ION
Co
nti
nu
ou
s-r
eco
rd
sta
tio
n
and
n
um
ber
(ab
bre
via
ted
)
Lo
w-f
low
p
art
ial-
rec
ord
sta
tio
n
and
n
um
be
r (a
bb
revia
ted
)A
899690
A
Mis
cellan
eo
us
sit
e
and
n
um
ber
(a
bb
revia
ted
)
Sta
tio
n
nu
mb
ers
ab
bre
via
ted
- fi
rst
two
d
igit
s
(16)
om
itte
d.
Pt.
S
ao
ks
a
s8 20'
58
17'
30"
162°
55
'162° 57'3
0"
163°
00'
Base
fro
m
Tru
st
Te
rrit
ory
o
f th
e
Pacif
ic
Isla
nd
s,
Ko
sra
e.
1976,
Sc
ale
1:1
0,0
00.
Figu
re 4
. Locations
of surface-water
stat
ions
an
d mi
scel
lane
ous
meas
urem
ent
site
s.
Data collected at gaging stations consist of records of stage and measure
ments of discharge. Records of stage are obtained from a water-stage recorder,
which produces a continuous graph of the fluctuations of the stream (figs. 5 and
6). Stream discharge measurements are made with a current meter and, together
with the stage records, are used to develop a stage-discharge relation. The
relation is used to compute daily mean discharges from which the monthly and
yearly mean discharges are determined.
Daily discharge values are not given in this report but are published in the
annual U.S. Geological Survey report "Water Resources Data for Hawaii and other
Pacific areas" for water years 1971-82, or may be obtained from the Geological
Survey District Office in Honolulu and the Subdistrict Office on Guam.
Tables with monthly and annual discharge totals, maximums, minimums, and
annual means are presented in the Hydrologic Data section. Also, peak
discharges, their times of occurrence, and corresponding stage, which are listed
for all peaks above a selected base discharge, are given in tables 21-26 in the
Hydrologic Data section. The base discharge is selected so that an average of
about three peaks a year can be presented. Time is expressed in 2^-hour local
standard time.
Partial-record stations are sites where discharge measurements are made on
a systematic basis over a period of years, usually during a period of base flow
when streamflow is primarily from ground-water storage. When these measurements
are correlated with the simultaneous discharge of a nearby station for which
continuous record is available, the low-flow potential of the stream can be
estimated. Discharge measurements made at sites not included in the partial-
record program are called measurements at miscellaneous sites. In the Hydrologic
Data section, the results of discharge measurements made at low-flow partial-
record and miscellaneous sites are listed (tables 27-32).
All records were collected in the inch-pound system of length, area, and
volume and are published as such. The data are published by water year, which
begins on October 1 and ends on September 30. The water year is designated by the
calendar year in which most of the water year falls.
17
CD
Wat
er s
tage
re
cord
er
Flo
at-t
ape
Sti
llin
g w
ell
Figure 5.
Gaging station
on M
alem
River
(destroyed by f
lood
in 1981).
Figu
re 6
. Se
ctio
n of a
typical
gaging station.
The average monthly discharges, in cubic feet per second and in percent of
annual total, are given in table 5« The data show that October is the month with
the lowest mean discharge and that April and May are the months with the highest
mean discharges. For comparison, the monthly rainfall at Lelu in percent of the
total rainfall is given in table 5- The rainfall means were computed from 25-29
years of record and the streamflow means from a maximum of 11 years (no complete
rainfall record is available for the period of streamflow record).
Table 5 also shows that the mean annual runoff per square mile is fairly
uniform throughout the island.
Streamflow characteristics
Runoff/rainfal1 comparison. A comparison between runoff and rainfall on
Kosrae cannot be made as rainfall records for the island are incomplete and the
available rainfall data were collected in coastal areas, while the heaviest
rainfall occurs at higher elevations. Complete daily rainfall data since 1972
are available only for the National Oceanic and Atmospheric Administration rain
gage at Lelu (197*0 and the Geological Survey rain gages at Sansruk (1972-73) and
Malem (1972). Cumulative rainfall readings are available for more years at
several sites. These, however, tend to be less accurate due to some evaporation
and because the period of about one year is not identical to the calendar year.
Table 6 lists the complete annual rainfall totals available since 1972 with, as
comparison, the annual totals for Kolonia on the island of Ponape.
Although there are substantial differences in daily rainfall in different
parts of the island, table 6 shows that yearly totals are quite similar. This is
also shown by a comparison of rainfall totals for August 1971 to May 1973 (21
months), the only concurrent period for which complete rainfall totals are
available.
Okat River (west coast) 317.7 in., cumulative readings
Palusrik River (south coast) 299.7 in., cumulative readings
Malem River (east coast) 287.3 in., daily readings
Tofol River (east coast) 30^.0 in., cumulative readings
Sansruk (east coast) 300.6 in., daily readings.
19
Tabl
e 5«
Aver
age
monthly
mean
discharge
in cubic
feet pe
r se
cond
ro o
Numb
er of ye
ars 2
( Drainage ar
ea (m
i [
October
Nove
mber
December
Janu
ary
February
Marc
hAp
r i 1
May
June
July
August
September
Total -
Annual mean
Mean
annual runoff
Mutu
r
) - Mean
4.44
5.61
6.93
4.45
4.70
6.53
6.58
6.80
5.75
5.59
5.45
5.92
68.75
5.73
11.0
ite
River
11-1
2
0.52 Pe
rcent 6.4
8.2
10.1 6.5
6.8
9.5
9.6
9.9
8.4
8.1
7.9
8.6
100
Okat
11 1
Mean
16.6
19.0
24.1
16.4
16.0
25.6
27.5
27.7
22.4
24.6
23.0
25.5
268.4
22.4
11.5
and
in
River
-12
.94 Pe
rcent 6.2
7.1
9.0
6.1
6.0
9.5
10.2
10.3 8.3
9.2
8.6
9.5
100
percent
of an
nual
total
Melo
River
7-8
0
Mean
4.19
6.11
8.76
5.61
5.57
9.03
9.62
8.36
8.58
7.01
6.67
5.34
84.85
7.07
10.4
.68
Per
cent 4.9
7.2
10.3 6.6
6.6
10.6
11.3 9.9
10.1 8.3
7.9
6.3
100
Male
m River
10-11
0
Mean
5.07
4.93
8.55
5.04
4.75
9.12
9.27
9.55
7.45
7.90
7.04
7.31
85.98
7.16
9.4
.76 Pe
rce
nt 5.9
5.7
9.9
5.9
5.5
10.6
10.8
11.1 8.7
9.2
8.2
8.5
100
Tofol 10 0
Mean
4.42
4.74
7.06
4.90
4.05
7.60
8.45
8.22
7.48
6.42
5.52
5.84
74.7
0
6.22
11.7
River
-12
.53 Pe
rce
nt 5.9
6.3
9.5
6.6
5.4
10.2
11.3
11.0
10.0 8.6
7.4
7.8
100
1 sland
aver
age
Per
cent 5.9
6.9
9.8
6.3
6.1
10.1
10.6
10.4 9.1
8.7
8.0
8.1
100 10.8
Lelu
ra i nf
al 1
Per
cent 6.3
7.4
9.9
7.2
8.1
9.3
10.8 9.4
8.9
8.0
7.5
7.2
100
per
squa
re mi
I e.
Table
6.
List of
av
aila
ble
annual rainfall to
tals
, in
in
ches
, si
nce
1972
[USGS, U.
S. Ge
olog
ical
Su
rvey
; NWS, National We
ather
Serv
ice.
Totals of
cumulative readings made for
the
year
in parentheses.
Years
almost identical
to ca
lend
ar ye
ars.
1972-81:
Average
of Island means,
l8l
inches;
of Po
nape
an
nual to
tals
, 19
0 inches]
Coas
t
North
West
Sout
h
East
Stat i on
Mutu
nte
River.
Okat Ri
ver
Melo
River
Palu
sr ik
River.
Male
m Ri
ver
Sans
ruk
Lelu
Tofol
Rive
r
1 si an
d me
an
Pona
pe(Kol
onia
).
By USGS do.
do.
do.
do.
do.
NWS
USGS
NWS
Alti
tude 20 5 20 10 10 5 7
100
125
1972
(213
.6)
(183
.5)
185.
919
8.2
(207
.2)
198
202
1973
19
74
(153
.5)
(177.5)
..
^153.5
-14
8.8
181.
7(156.4)
153
180
174
206'
1975
1976
(201.3)
(189.0)
.. -_
__
(238.7)
210
-2/2
40
192
236
1977
1978
1979
1980
-7(1
45.0
) -
155.4
_.(1
80.1
)
(154.5)
(161.5)
V-j /
1 1 n
ito
-'' i
in
\}\i
lo^
i yy
IP/
163
159
196
194
1981
(183.8)
__ -- __ -- (175.2)
1 Qn
IOU
182
Dece
mber
to
tal
from
Mal
em ra
in ga
ge.
June and
August to
tals
fr
om Sa
nsru
k rain ga
ge.
Esti
mate
fr
om table
7.
Although rainfall is heaviest at higher altitudes and all rainfall informa
tion was collected at low altitudes, the ratio between runoff at the gaging
stations and coastal rainfall can be used to estimate the annual rainfall for
1976-77 and 1979 for which years no total rainfall figures are available
(table 7). Using the estimated values, the mean annual rainfall for 1972-81 for
coastal areas on Kosrae is l8l inches. This is somewhat less than the 201-inch
total of the monthly rainfall means at Lelu (table 2). The difference is caused
by the unusually high rainfall during 1957-63, when the mean of the annual totals
of the 5 years for which complete rainfall data were reported by the U.S.
National Oceanic and Atmospheric Administration, was 286 inches.
The physical features and climatic conditions of Kosrae are very similar to
those on the island of Ponape, 3^0 statute miles to the northwest. On Ponape,
the long-term (55-57 years) mean annual rainfall at Kolonia on the north coast is
191 inches and the mean annual rainfall for 1972-81 is 190 inches (U.S. National
Oceanic and Atmospheric Administration, 1981). The mean annual rainfall on
Kosrae for 1972-81 was 181 inches, from incomplete rainfall data at several
locations and estimates of rainfall based on the runoff/rainfall ratios of table
7. Thus, rainfall at coastal areas on the two islands can be considered to be
about equal. Although no comparison between runoff and rainfall on Kosrae can be
made, it can be assumed to be similar to Ponape, where about 65 percent of the
total rainfall runs off into the ocean (Van der Brug, 1984).
The average of the mean discharges of Mutunte, Okat, Malem, and Tofol Rivers
was 1^3 inches for 1972-80, and H6 inches for the period 1972-7^. Prior to
197^> the only diversion was the small amount diverted from Mutunte River. Using
the 65-percent runoff figure, the average annual rainfall in the interior of
Kosrae is estimated to be 225 inches.
22
Table 7» Runoff/rainfal1 comparisons
Mutunte River Okat River
Drainage area -
Calendaryear
1972197319741975197619771978197919801981
Mean
Note:
Averageannualra i nfal 1(in)
198153180210(240)(130)160
(199)157180
181
Est imate
0.52 mi 2 1.94
Runoff
Run- in Runoff per- off( in) cent ( in)
177.2 89 179.1138.4 90 118.9153.8 87 137.1169.4 81 135.0201.3 186.1110.4 101.5104.4 65 132.2148.3 190.3117.2 75 152.5132.3 74 176.3
145 80 151
of 1976-77, 1979 rainfall
mi 2
Runoffin
percent
90777764-- 83 9798
84
.Average runoff in inches
Average mean runoff in
1976
1977
1979
183*** x 100 = 240
inn _ .i o «
^j-2- x 100 = 199
Malem River
0.
Runoff(in)
152.110.132.143.170.86.97.133.115.
127
for thepercent
76 mi 2
Runoffin
percent
2 774 725 752 68412 6127 74
71
year <AA2 x 100
Tofol
0.53
Runoff(in)
167.0128.3153.2156.5200.0113.2119.9
159.6
150
Rivermi 2
Runoffin
percent
84838775 75 89
82
23
Flow-duration curves. A flow-duration curve is a cumulative frequency
curve that shows the percentage of time that a specified daily discharge was
equaled or exceeded within the total period of record. This curve combines in
one curve the flow characteristics of a stream throughout the range of discharge
without regard to the sequence of occurrence. The general shape of such a curve
is influenced by many factors, such as basin slope and cover, ground-water
contributions, precipitation, and diversion.
The curve shows the distribution of daily discharges in different class
limits in increasing order of magnitudes for a period of record. Discharges in
cubic feet per second are plotted on the ordinate and percent-of-time equaled or
exceeded is plotted on the abscissa. The information is essential for the
planning of stream diversions for water supply or for assessing hydro-electric
potent ial.
For comparison of curves for different streams, data covering the same
period are preferred to avoid including an extremely dry or wet year in one set
and not in the other.
Figure 7 shows the flow-duration curves for the locations where 8 to 9 years
of streamflow record have been obtained. The shape of the curves indicate a
similarity of the geology of the four drainage basins. However, the flattening
out of the lower end of the curve for Tofol River indicates the stream receives a
greater amount of ground water during low flow periods.
High-flow frequency curves.--High-flow frequency curves show the maximum
mean discharge for certain periods of consecutive days and its likelihood of
occurrence. These curves can also be used to show the frequency of instantaneous
annual peak discharge. Figures 8-11 show the high-flow frequency curves for 1,
3, 7> 15» 30, 60, and 90 consecutive days at the gaging stations with 8 or 9 years
of record. Figure 12 shows the frequency curves of annual and instantaneous peak
flows for the same four gaging stations: Mutunte, Okat, Malem, and Tofol Rivers.
High-flow frequency curves provide information needed to determine the size of
reservoirs and diversion structures. Frequency curves for annual peak flows are
needed to size and design storm drainage systems, culverts and bridge openings.
Low-flow frequency curves.--Low-flow frequency curves show the lowest mean
discharge for certain periods of consecutive days. Figures 13-16 show these
curves for a number of consecutive days varying from 1 to 120 days for the four
continuous-record gaging stations.
24
1000
o oUJ 00
UJ
oI I COZD O
UJts01
o00
TOO
10
0.1
T~n nr~ii i i i i i i i i i i TT~I rrEXPLANATION
Mutunte River, 1972-80 Okat River, 1972-80
-Malem River, 1972-80--Tofol River, 1972-79
\
p uno o o o o o o o Oi oo LT> o o o o
oo o o
ooooooo o o oooooOOOOOOO O O O O LT> CO CX>
ooooooo LT> CO O"i O"i <T> O"i O~> Ot CTi CTi O~> CT>
cr>CTi CTi
PERCENTAGE OR TIME INDICATED DISCHARGE WAS EQUALED OR EXCEEDED
Figure 7. Flow-duration curves of four continuous-record stations.
25
300 1 I I I I I I
100 1 day
o oUJ 00
UJ Q_
O i i OQ 2D O
CD CfL<C 31 O 00
10
Drainage area, 0.52 square mile
Period 1972-80
i I I I I I I1.01 1.1 1.3 1.5 2 5
RECURRENCE INTERVAL, IN YEARS10 25
Figure 8. Magnitude and frequency of highest mean discharges for duration indicated, Mutunte River.
26
600
Q Z. O
UJ GO
UJ 0.
B 100
CO
CD
GO I I Q
Drainage area, 1.94 square miles
1day
3 day
7 day
15 day30 day 60 day 90day
101.01 1.1 1.3 1.5 2 5
RECURRENCE INTERVAL, IN YEARS10 25
Figure 9. Magnitude and frequency of highest mean discharges forduration indicated, Okat River.
27
DISCHARGE, IN
CUBIC
FEET PER
SECO
ND
ro CO
O>
EU CO O 3"
cu
-s
to
o
oC
O o
oo
CO c: O
o
cu Id c: Q.
Q.
O>G
-S
EU
QJ r
srl
r Q
.
o'
-h
rs
-s
o p
QJ
<<
rt
-O>
O
Q
. -h
CU
CQ
H
-I IT
- -z
.3
co
-<
CO ro
o CO
ro
en
o> -s o Q.
ro i oo
o
300
100 1 day
o z. oUJGO
UJ D_
UJ UJ U_
0 i icar> o
UJcu Di<c
CO i i O
10
15 day30 day 60 day 90 day
Drainage area, 0.53 square mile
Period 1972-79
1.01 1.1 1.3 1.5 2 5RECURRENCE INTERVAL, IN YEARS
10 25
Figure 11. Magnitude and frequency of highest mean discharges forduration indicated, Tofol River.
29
10,000
EXPLANATION
Q2T O
LU I/O
LU Q_
LU UJ
COZD o
LU O
oI/O
Malem River Mutunte River Tofol River Okat River
1000
1001.1 1.31.5 2 5
"RECURRENCE INTERVAL, IN YEARS10 25
Figure 12. Magnitudes, and frequencies of annual and instantaneous peak flows for four continuous-record stations.
30
10
Q Z O
ooo; D_
COZD O
CD
o oo
0.1 1.01
Drainage area, 0.52 square mile
Period 1972-80
1.1 1.3 1.5 2 5 RECURRENCE INTERVAL, IN YEARS
1 day
10 20
Figure 13. Magnitude and frequency of lowest mean discharges forduration indicated, Mutunte River.
31
60
Q 2:O
UJco
UJ D_
0I i COZ3 O
UJ
1C 0oo
10
Drainage area, 1.94 square miles
Period 1972-80
11.01 1.1 1.3 1.5 2 5
RECURRENCE INTERVAL, IN YEARS10 20
Figure 14. Magnitude and frequency of lowest mean discharges forduration indicated, Okat River.
32
20
10
Qz:oLUco
LU
COID 0 1
CD
OcoQ
Drainage area, 0.76 square mile
Period 1972-80
0.11.01 1.1 1.3 1.5 2 5
RECURRENCE INTERVAL, IN YEARS10 20
Figure 15. Magnitude and frequency of lowest mean discharges forduration indicated, Ma!em River.
33
10
o oUJ (S)
CXL UJa.I
ot I CQ
05 CHL
O C/0
Drainage area, 0.53 square mile
Period 1972-79
0.11.01 1.1 1.3 1.5 2 5
RECURRENCE INTERVAL, IN YEARS
10 20
Figure 16. Magnitude and frequency of lowest mean discharges forduration indicated, Tofol River.
34
Correlation of partial record with continuous record
The purpose in operating a low-flow partial-record station is to determine
the low-flow characteristics of the stream through correlation with concurrent
discharges at continuous-record gaging stations.
Discharge measurements made at three partial-record stations were
correlated with discharges at nearby continuous-record stations. Table 8 lists
the correlations made and figures 17-19 show the regression lines. These regres
sion lines can be used to obtain a reliable estimate of low flows at the partial-
record stations for a number of consecutive days during a certain period.
For example, figure 17 indicates how the low-flow 14-day Q~ (lowest mean
flow of 14 consecutive days with a 2-year recurrence interval) for the Tafuyat
partial-record station is derived from the 14-day Q2 flow for the corresponding
continuous-record station, a value obtained from the low-flow frequency curve
for that station (fig. 16).
Water Quali ty
General
The locations where the Geological Survey collected water samples for
chemical analyses are listed in table 9 and shown on figure 20.
Results of these analyses are given in the Hydrologic Data section, tables
^5-53- These analyses show the water to be of excellent quality, uniformly soft,
and very low in dissolved elements and solids.
All water samples were analyzed by the Geological Survey Central Laboratory
in Denver, Colorado. Discharge, water temperature, specific conductance, pH,
and dissolved oxygen were determined at the site.
During many of the discharge measurements made on Kosrae, water tempera
tures were obtained. These temperatures are listed in the Hydrologic Data
section, tables 3^-^.
Surface-water quality
Water-quality data were collected by the Geological Survey at 12 streams in
1971 and 1979-82 to determine the baseline chemical and physical characteristics
of surface water. Toxic chemicals and bacteriological determinations were not
part of this basic inventory.
35
Table 8. Correlation between discharges at low-flow partial-recordand continuous-record stations
[X, discharge for continuous-record station; Y, discharge for partial-record station]
Dra in-Partial- age Continuous- record area record
station ( m j 2 ) station
Drain age area
(mi 2 )
Number of Corre-obser- lationva- coeffi-tions cient
Regress ion equat ion
Tafuyat 0.27 River.
I nnem River.
1.82
Pukusruk .27 River.
Tofol River 0.53
do.
13
.53
Malem River .76
0.93 Y = 0.40X 1 *
.87 Y = 3.05X0.916
.90 Y = 0.07X2.123
36
100
o ZL
O Di C_) UJ UJ >OO i i
C£UJ I O. ef
*-* oCQ I I ID h- O <
I ^ OO
LU oC3 O Qi UJ
oo «a; i i i i o h-01
Q < LU Qu
oo
10
0.5
0.1
I I
0.5
O
I I I I I I II1 5 10
DISCHARGE, IN CUBIC FEET PER SECOND, AT CONTINUOUS-RECORD STATION TOFOL RIVER
I I50
Arrows show how discharge at partial-record station is obtained from discharge at continuous-record station. Q2 is the mean flow with a 2-year recurrence interval.
Figure 17. Correlation between discharges at Tafuyat and Tofol Rivers
37
MEAS
URED
DISCHARGE, IN
CUBIC
FEET
PE
R SECOND,
AT PA
RTIA
L-RE
CORD
STATION
INNE
M RIVER
GO co
en
cr -s fD CO
O
O -s -S CU
I.
o Z5 cr CD (D
(T)
Z5 Q.
to
O -s CQ
(T
)
(T)
3 QJ Z5
Q.
I
O -h
O (T) -s
to
O
cn
OC
D o
oO
i i
O
CO
:z o
I r
n
<= o
O
noo m o
o
O <
=?
O
CO
o i i
o
CO I -
nD>
n
O ^ -
a
n I
73
o -n c
oo n
i c
~> o73 Z
i
i O
O on o
TT
0
©
CO
-5
05 O
O -s
~s O> a> cr
o> O>
O> o
^r
a> -s
to CD OJ o.
12 QJ 05
MEAS
URED
DISCHARGE, IN CU
BIC
FEET
PER
SECO
ND,
AT PA
RTIA
L-RE
CORD
ST
ATIO
N PU
KUSR
UK R
IVER
OO o
oO
H
-l
O C
Ozr
o
o m
CO i o o
o c
:TO
oo
O
H-l c~>
CO I -
n 3=
> m
I m
I
COm
m3
o o^3
Z
i
O
o
I I
I
Table 9« List of locations where chemical analyses of streamflow were made
Stat ionNo. Station name Date sample collected
16899500 Mutunte River 5-2-71 9-19-79 5-14-80 -- -^Q-30-81 10-20-82
16899600 Okat River 8-9-71 9-21-79 5-15-80 11-2-81 10-19-82
16899620 Melo River 9-21-79 5-15-80 -- 11-2-81 10-20-82
16899670 Mwot River -- 4-2-81 -- 10-20-82
16899680 Walung River 4-2-81 -- 10-20-82
16899690 Finkol River -- 4-4-81 10-15-82
16899700 Palusrik River 10-19-71 5-16-80 4-4-81 10-15-82
16899750 Malem River 6-2-71 9-18-79 5-12-80 10-28-81 10-18-82
16899780 Tafuyat River 5-12-80 10-15-82
16899800 Tofol River 4-5-71 9-20-79 5-13-80 -- 10-29-81 10-16-82
16899830 Innem River 5-13-80 10-17-82
16899840 Siba raincatchment -- -- -- 4-6-81
16899850 Pukusruk River -- 5-13-80 4-1-81 10-31-81 10-21-82
16899851 Siba faucet(Pukusruk Riveruntreated water) -- -- -- 10-31-81
Spring at Tafunsak 5-2-71
At dam, 0.3 mile upstream from station.
40
E.
N.
162*
55'
I
162*
57'3
0"16
3*00
'
KO
SRA
ECA
ROLIN
E IS
LAND
S
Pt.
Fin
aun
pes
I 2
Kilo
met
ers
EX
PL
AN
AT
ION
2 M
iles
J
y»96
9o
wate
r-q
uality
s
tati
on
an
d
nu
mb
er
(ab
bre
via
ted
)
Sta
tio
n
nu
mb
ers
ab
bre
via
ted
; fi
rst
two
d
igit
s
(16
) o
mit
ted
.
Pt.
S
ao
ksa
5 ~
20'
5-1
7'
30
162°
55
'16
2 57
30
'16
3*00
'
Bas
e fr
om
Tru
st T
err
ito
ry
of
the
Pa
cif
ic I
sla
nd
s,
Ko
sra
e,
19
76
, S
ca
le
1:1
0,0
00
.F
igu
re
20.
Loca
tion of
wate
r-qualit
y sta
tions
Rainfall is the source of all surface water on Kosrae. The quality of the
surface water is excellent; the concentrations of all chemicals analyzed are well
within the maximum permissible level recommended for domestic use by the World
Health Organization (1971) (table 10). The dissolved-sol i.ds concentration of
the stream water ranged from 25 mg/L (milligrams per liter) to 125 mg/L with a
mean of 68. Silica concentrations ranged from 8.9 to 27 mg/L and 24-35 percent
of the dissolved solids. This is characteristic of rainwater flowing over
tropical volcanic terrain. Other constituents in decreasing order of concentra
tion were: alkalinity, calcium, sulfate, chloride, magnesium, sodium,
potassium, nitrite plus nitrate nitrogen, and fluoride.
The iron concentration of surface water ranged from 9-670 yg/L (micrograms
per liter) with a mean of 160 yg/L. Iron is a minor element in water but can
cause undesirable effects when the concentration exceeds 300 yg/L. It can cause
problems with taste, discoloration, turbidity, and growth of iron bacteria. The
World Health Organization recommends a desirable level of 100 yg/L and a maximum
permissible level of 1,000 yg/L.
The physical quality of streamflow is influenced by flow conditions. Runoff
from tropical storms is usually flashy and can cause turbidity problems in stream
water and shore waters. However, storm duration generally is short and streams
revert to base flow with clear water within a short time. Physical quality data,
in terms of specific conductance, pH, temperature, and turbidity, are included in
the chemical analyses as integral parts of the baseline information.
Specific conductance is expressed in micromhos per centimeter at 25 C. It
is a measure of the ability of water to transmit electrical current and is used
as an indicator of the amount of dissolved solids in water; for example, the more
dissolved solids, the greater the conductance. The specific conductance of
stream water on Kosrae did not exceed 148 ymho.
A measure of acidity or basicity is pH. In natural water, pH is a function
of chemical and biological processes. For streams on Kosrae, pH values ranged
from 6.2 to 8.2 and are within the recommended range for public water supply.
Stream temperatures do not vary much on Kosrae. They fluctuate somewhat
with ambient conditions and are normally highest in midafternoon. Temperature is
an important consideration because of its effect on chemical reactions and biolo
gical activities.
The turbidity of the stream samples analyzed reflects only base-flow condi
tions. Only one sample exceeded 5 NTU (Nephelometric Turbidity Unit).
Table 10. World Health Organization drinking-water standards
[Trust Territory standards are based on World Health Organization standards.NTU, nephelometric turbidity units; mg/L, milligrams per liter;
lig/L, micrograms per liter]
Const i tuent
r.H ____..-__-.-_-___--__ _____ _ .
Turbidity ---_----- ____ __.
Hardness as CaCO - -- - -
Calcium, dissolved (Ca) -- -
Magnesium, dissolved (Mg) --
Sulfate, dissolved (SO.)
Chloride, dissolved (Cl)
Fluoride, dissolved (F) - --
Solids, total dissolved Iron, dissolved (Fe) ---------
Manganese, dissolved (Mn) -
Unit
NTU
- mg/L
- mg/L
mg/L
mg/L- mg/L
mg/L
- mg/L
- pg/L
- yg/L
Highest desi rable
7.0-8.5
5
100
75
30
200
200
(*)
500
100
50
Maximum permi ssi ble
6.5-9.2
25
500
200
150
400
600
(*)
1,500
1,000
500
(*) 1.4-2.4 mg/L, depending on ambient temperature.
43
WATER-RESOURCES DEVELOPMENT
There is no central water system on Kosrae but most of the villages have
their own supply a pipeline from a small dam on a nearby stream to the village.
Thanks to abundant rainfall, there normally is sufficient water all year.
In 1969, a small concrete dam was built on the Mutunte River with a 3-inch
pipeline to Tafunsak. The Geological Survey gaging station is located at that
site. Dirt and rocks filled in behind the dam, and in 1972, a new dam was built
about 0.3 mile upstream at the mouth of a gorge. A 12-inch steel pipe connected
to an 8-inch pipe carries the water to Tafunsak.
In 1973, a small concrete dam was built on Pukusruk River, a half mile
upstream from the mouth, at an altitude of 180 feet. The dam is 10 feet high on
the downstream side and has a debris barrier at the upstream side. The reservoir
is 40 feet long and 24 feet wide. Water is diverted through an 8-inch pipe to
Lelu.
In 1975, a 5-foot high and 25-foot wide diversion dam was built on the Tofol
River about 500 feet upstream from the Geological Survey gaging station. From
here, water is diverted through an 8-inch pipe to the Tofol Administration area.
A concrete dam built during the Japanese Administration is located on the
Tafeyat River about a mile upstream from the mouth at an altitude of 100 feet.
This dam is 40 feet wide and 9 feet high with a 20-foot wide, 2-foot deep
spillway. A concrete wall extends 30 feet upstream along the left bank. The dam
is no longer used.
In 1974, a small dam was built on the Malem River to supply the village of
Malem with water through 1,500 feet of 6-inch pipe.
A concrete dam was constructed in 1972 on the Palusrik River, 2 feet down
stream from the Geological Survey gaging station, 0.4 mile upstream from Finkol
River. This dam is 59 feet wide, 3 feet thick, and 6 feet high with a 4.25-foot
central notch in the spillway, which can be regulated with boards. Water is
piped to Utwa village for domestic use.
With the exception of the water for Lelu, the water for the villages is not
treated or distributed.
44
SUMMARY
Rainfall on Kosrae is plentiful and none of the streams on the island is
known to go dry. Rainfall data are available for most years during 1895-1912 and
since 1954. The data show an average annual rainfall.at Lelu of 184 inches
during 1903-12 and 208 inches during 1954-78, and an average of about 181 inches
for coastal areas during 1972-81. For the 5 years of complete rainfall during
the period 1957 to 1963? an average annual rainfall of 286 inches was reported.
Rainfall for these years increased the annual rainfall average for Lelu from 183
to 201 inches. Rainfall in the interior was estimated at 225 inches per year on
the basis of a mean annual runoff per square mile of 10.8 ft /s or 147 inches. No
rainfall/runoff comparison can be made for Kosrae due to the lack of rainfall
data for the interior, but is assumed to be similar to that of Ponape where 65
percent of the rainfall runs off into the ocean. The quality of the surface
water is excellent as shown by 42 chemical analyses of water from 12 streams.
There has been no ground-water exploration because of the abundance of
surface water. There is no central water distribution system on the island
outside Lelu but each village diverts water from a nearby stream for village use.
HYDROLOGIC DATA
Rainfall Records Page
German rainfall records:
Monthly and annual rainfall totals at:Mwot, 1895-1904 49
Lelu, 1903-1912 49
U.S. National Weather Service rainfall records, Lelu, 1954-78:
Monthly and annual rainfall totals 50
U.S. Geological Survey rainfall records:
Cumulative or daily rainfall readings at:Mutunte River, 1971-72, 1974, 1977-81 51
Okat River, 1972-76 56
Melo River, 1974-81 58
Palusrik River, 1971-73 60
Malem River, 1971-74, 1978-81 61
Tofol River, 1971-81 67
Sansruk, 1971-73 70
Srono, 1982-83 73
Streamflow Records
Gaging stations
Peak discharges, annual minimum discharges, and monthly
and annual discharges for the following stations: Mutunte River - - 75
Okat River 81
Melo River 87
Palusrik River 92
Malem River - -- - 96
Tofol River - - - - ---- --- 103
46
HYDROLOGIC DATA
Page
Low-flow partial-record stations
Discharge measurements made at low-flow partial-record
stations: Mwot River - ------- _____ ______________________ ___ 111
Tafuyat River --------------------------------------------- 112
Innem River ------------------- __ ________ ________ __ 113
Pukusruk River --- -------------------------- __________ 115
Yekula River 116
Miscellaneous sites
Discharge measurements made at miscellaneous sites --------- -- 117Seepage study of Finkol River - 118
Water and Air Temperatures and Instantaneous Discharges
Water temperatures, instantaneous discharges and, where available,
concurrent air temperatures at: Mutunte River -- 119
Okat River -- 122
Melo River 124
Mwot River 124
Walung River - -- ----- -_-_-______ ____ ____ __ __________ ]2k
Palusrik River 125
Malem River ------------------------- __ _______ ____________ 126
Tafuyat River ------------ ____ __ ____ ______ ____________ 128
Tofol River 129
Innem River ------- _________________________________________ 131
Pukusruk River 132
Yekula River 132
Water Quali ty
Page
Chemical analyses of water from:Mutunte River -- --- ---- -- 133
Okat River ------ ---- ---- -- -- 134
Melo River ---- ---- -------------- -- ------- -- - --- 135
Palusrik River ------------------------- -------- ____ _-_.__ 135
Finkol River -------------------------------- _-____--_-__ _- 135
Malem River --------------- ------------------------------------- 137
Tofol River --- ------------------------------------------------- 138
Tafuyat River -- -- -- ----- -- ---- -- 139
Innem River -------- ---------- _ - --------- -_._ - 139
Pukusruk River ---------------------- --------------------------- 139
Mwot River --------- __._- __
Walung River -- -- ----
Miscellaneous sources -------------------------------------------- 141
Rainfal1 Records
Table 11. German rainfall records
Monthly and annual rainfall totals, in inches, for 1895-1912
[Sources: "Strategic Bulletins of Oceania" No. 7, publication of Institute of Human Relations, 1943,
and "Mitteilungen von Forschungreisenden und Gelehrten aus den deutschen Schutzgebieten," 1905, 1913]
Year
1895
1899
1902
1903
1904
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
Years
Mean
Jan.
27.99
20.28
17.24
9.21
20.32
15.35
3.90..
13.86
17.40
9.96
20.79
14.92
15.04
8
13-90
Feb.
19-02
23.78
13. 5**
6.81
13.23
8.03
30.12
6.93
19.13
20.12
15.28
7.68
10.87
5.85
913.78
Mar.
32.99
25-39
38.70
19.80
19.37
16.89--
12.36
21.69
10.32
20.83
23-90
20.35
8.78
816.89
Apr .
22.01
26.61
25.71
17.64
14.76
--
2*4.05
14.96
21.30
24.33
28.11..
13-71
6
21.08
May
30.98
21.26
39.33
19.80
32.32
25.71
--
15.4718.7816.1818. 5**24.41
19.06
719. 74
June
At
25.00
10.55
30.12
24.37
22.72
At
14.57--
18.35
20.75
14.92
22.16
28.62
--
12.03
718.77
July
Mwot
15.98
24.41
25.91
29.80
23.58
Lelu
9.53--
13.54
9.21
10.12
16.06
13.98--
14.46
712.41
Aug.
20.98
21.77
29.33
12.36
16.50
8.42
8.66..
7.28
10.08
15.24
8.90
23.07
13.58
14.54
912.20
Sept.
20.00
27.13
37.44
13.15
26.69
8.23
18.15
12.28
11.1817.4811.2615.1211.02
11.82
912.95
Oct.
22.01
15.55
13.54
11.89
14.88
9-29
7.64--
10.75
8.62
10.67
7.83
8.98
13.94
15.50
910.36
Nov.
25.00
20.04
12.56
14.25
24.92
8.78
14.09--
22.24
8.03
19.72
14.41
16.54
11.10
13.39
914.26
Dec.
24.02
17.56
8.03
25.08
8.82
22.48
5.28--
22.09
22.28
21.02
15.79
24.37
4.1718.42
917.32
Annual
285.98
254.33
291.45
204.16
238.11
--
..
178.57194.49185.35235.57
--
162.60
1X 183.66
Total of 12 monthly means.
Table 12. National Weather Service rainfall records at Lelu
Monthly and
[Sources:
and
Year
1954
19551956
19571958
1959I9601961
1962
1963
19641965
1966
196?
1968
1969
1970
1971
1972
1973197 1*
19751976
19771978
Years
Mean
Jan.
16.37
14.57
18.7924.23
5-32
17.27
37.51
23.628.45
9.18
6.69
24.5216.42
5.02
11.90
3-511/9.41
14.39
9.95
19
14.58
Feb.
13.35
14.40
25-40
25.97
38.6722.35
32.05
32.31
12.41
5-77
28.5512.46
13.85
3.9718.00
14.97
8.447.48
13.85
5.97
20
17.51
Mar.
22.39
16.95
14.72
32.65
34.3820.64
24.76
29.9914.09
13.67
21.87
15.5128.884.69
3.93
17.40
23.88
7.3517.61
29.83
17.9311.85
22
19.32
Apr.
34.97
12.50
27.6317.36
28.1353.19
16.02
21.58
13.73
25.34
17.58
24.50
16.3116.22
29.57
18.97
18.04
18.00
16.60
10.59
20
21.84
annual rainfall totals, in inches, for 1954-78
U.S. Weather Bureau, 1968, and U.S. National Oceanic
Atmospheric Administration, 1956-72 and 1973-78]
May
19-36
21.34
16.36
21.19
43.9530.10
31.83
14.3119.14
11.18
14.48
19.4711.48
15.3315.02
--
7.71
--
19.46
10.37--
13.31
19
18.70
June
13.63
20.11
15.35
16.39
37.7530.31 --
14.95
26.24
17.28
18.70
13.51
14.3315-80
9.5418.06
15.21
8.08
16.62
17.70
11.06
20
17.53
July
14.91
15.60--
38.0416.30
32.378.62
9.8524.30
20.07
14.92
19.65
16.55
12.20
16.3110.318.74
19.9221.24
9.96
18.08
14.08 --
21
17.24
Aug.
10.44
19.16
23.80
27.86
26.43
10.93
7.3319.92
11.96
34.3720.70
6.19
6.08
10.91
19.595.08
22.95
13.15--
19.84
14.81
17.46
10.7710.68
23
16.10
Sept.
15.92
16.54
19.3933.65
15.02
19.70
11.1811.4515-9316.1821.67
9.81
4.24
8.59
13.185.22
15.97--
19.84--
15.14--
12.10--
20
15.04
Oct.
11.47
15.35--
18.04
20.46
12.13
12.181/14.24
14.72
20.45
11.66
11.69
8.48
6.26
14.25
14.61
19.1412.70
17
13.99
Nov.
11.50
15.43
26.38
18.34
11.2921.30
17.7820.34
22.3811.97
20.03
8.58
13.08
12.05
17.70
15.74
11.64
8.90
7.10--
10.08
20
15.08
Dec.
15-43--
27.58
18.94
23.68
40.88
31.02
16.9424.7135.6421.70
17.9516.08
9.82
10.21
15.56
10.26
11.84--
30.68
26.5115-22
20
21.03
Annual
--
--
--
287.03
302.14
294.21--
--
1/255.91
288.28
140.09
189.03
184.71--
--
--
1/181.71
--
-- --
-/207.96
A few days estimated.
Total of 12 monthly means.
50
Table 13. Daily and cumulative rainfall readings, in inches, at Mutunte River
[Rain gage established May 4, 1971 at lat 5°2r54" N., long 162°59 I 15" E., in yard of Tafunsak Elementary School, 500 ft downstream from Mutunte River
gaging station; altitude, 20 ft (from topographic map)] *
1971
Day
12345678910111213141516171819202122232425262728293031
Total
May
****************************
June
****
24.5*************************
July
******
10.2************************
Aug.
*13.5
****************************
19.5
Sept.
*************
6.5**************
17.6*
- (24.1)
Oct.
***************************
10.5.3
1.2.2
(12.2)
Nov.
0.21.2.5
3.7.4.2.1.7.1.1
1.01.51.12.41.0.2.3.5.6.2
1.10.5.1.2.2.4
3.1.1
0
?1 7t-\ I
Dec.
00.3.2.3.1.3.2.1.2.3.1.4
0000000
1.2.3.6.4.5.3
2.12.32.0.7
10 Q"
* Included in following total. Total May 4 to December 31, 1971: 138.6 inches.
51
Table 13. Daily and cumulative rainfall readings, in inches, at Hutunte River Cont i nued
1972
Day
12345678910111213141516171819202122232425262728293031
Total
Jan.
0.9.9
2.7.3.3
00.3.7
0.1
2.0.6.4
0.2.3
00.4.6.1
000000000
10.8
Feb.
000000.2.1
1.2.3
0.9.8
00.2.3.1.2.5.6
1.91.41.81.7.4
1.31.31.1
16.3
Mar.
1.1.2
1.0.9.9
1.1.7.3
2.4.9.9
3.32.1.3
2.40.7
1.50002.000001.902.13-91.2
31.8
Apr. May
1.41.64.5.8.6.1.2.3.1
01.41.60.8
003.11.0t.2.5.9
1.01.01.0000000
--
(23.1) -
June July
*****
4.5**
* ** ** A
* *
* *
* *
* *
* *
* 2.8j. j-j. j.* ** *
8.0 ** *j- j.j- j-j- j-* ** *»> "k
* *
*
~ ~ ~ "
Aug. Sept.
* 0.4* 1.2
5.0 1.5.5
1.01.0.4.2
1.51.22.02.0.4
00000.2
00.2.2
0.2
0.1
04.0.2
--
18.4
Oct.
0.5
2.000.3.4.4
000000000000000001.11.21.02.000
8.9
Nov. Dec.
000001.02.000000000000000000.8 -.2.8 --
2.8 --.9 -.3 --
--
8.8
* Included in following .total.
52
Table 13. Daily and cumulative rainfall readings, in inches,at Mutunte River Continued
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan. Feb.
1.5 *2.2 *3.0 *0 0.62.0 .73.5 *0 *0 *0 *0 *0 5.51.8 *0 *0 *0 *0 *1.3 *.4 *
0 *0 *.4 *. j.4 ** 4.2
0 00 00 .20 .301.00
18.0 11.5
- 1974
Mar.
00*1.61.3*.5
2.4.2.2.3
02.10.5
00 .1
0.2.2*
02.30.1.5 ~
--
Apr.
0.3.8.5
00**
2.0.5
1.81.12.1**
2.9*.1
0.3
000.7*
2.200*
2.01.7
19.0
May
00.5*A**1.601.1.2
00.2.5.7.4
000.2***1.0.3.1 h
*
1.0
0
7.8
No record available, June to December.* Included in following total.
53
Table 13- Daily and cumulative rainfall readings, in inches, at Mutunte River Continued
Per iod Rainfal1 Period Rainfal1
1977
Mar. 16 to Apr. 29 Apr. 29 to May 17 -----May 17-23 May 23 to June 11 June 11 to July 30July 30 to Aug. 27 -
Jan. 3-17 Jan. 17 to Feb. 1 ---Feb. 1-16 Feb. 16 to Mar. 13 Mar. 13-27 Mar. 27 to Apr. 11 -Apr. 11-24 Apr. 24 to May 23 May 23 to June 5 -June 5-19 June 19 to July 3 - July 3-17
Jan. 3-17 ---- -----Jan. 17-31 ----------Jan. 31 to Feb. 12 -Feb. 12-26 Feb. 26 to Mar. 13 Mar. 13-27 Mar. 27 to Apr. 11 Apr. 11-23 Apr. 23 to May 7 ------
28.728.51.86.514.88.3
11.95.04.07.3.1
10.63.512.66.96.83.82.4
Tota
3.33.2
12.111.713.011.93.35.9
Aug. 27 to Sept. 24 13-0
1978
Sept. 2k to Oct. 28 Oct. 28 to Nov. 22 Nov. 22 to Dec. 8 Dec. 8-21 Dec. 21 to Jan. 3 ------
July 17 to Aug. 1 ------Aug. 1-14 Aug. 14-28 Aug. 28 to Sept. 13 - Sept. 13-26 Sept. 26 to Oct. 12 Oct. 12-23 Oct. 23 to Nov. 6 ------Nov. 6-22 Nov. 22 to Dec. 4 ------(Dec. 4-31
145.0 inches
1979
May 7 to June 12 - June 12-23 June 23 to July 9 July 9-23 July 23 to Aug. 6 Aug. 6-20 Aug. 20 to Sept. 6 Sept. 6-19 Sept. 19 to Oct. 2
7.0 8.5 1.5 8.0 .9
3.8 5.4 1.2 6.413.0 3.2 1.9 2.8 7.8 5.218.5)
7.27.36.5.4
7.1 4.21.3.9
3.4
54
Table 13- Daily and cumulative rainfall readings, in inches,
Per iod
Jan. 1-23 Jan. 23 to Feb. 7 Feb. 7 to Mar. 4 -Mar 4-18 ______1 lO 1 ~ 1 W
Mar. 18 to Apr. IkApr. 14 to May 2 - Mav 2-14 _______F to y £. I "Mav 14-77 ---- 1 la J I Tr £. /
May 27 to June 10June 10-23 June 23 to July 8
at Mutunte
Rainfal 1
----- (9.0) ----- 4.9 3.5 2.3 - 4.9 15.7 16.1_____ 7 Q/ ?_____ 7.3- (15.0) ----- 6.9
River Continued
Per iod
1980
July 8-21 July 21 to Aug. 4 - Aug. 4-18 - Aug. 18 to Sept. 2 Sept. 2-29 Sept. 29 to Oct. 28 Oct. 28 to Nov. 10 -Nov. 10 to Dec. 1 - Dec. 1-15 Dec. 15-29
Rainfal 1
/, Q^ 3- 4.6- 5.7- 3.7
6 0.0 5.7 ----- 6.7 - 5.0----- 12.3 ----- 6.5
Total Jan. 1 to Dec. 29, 1980: 155-4 inches
1981
May 13-27 May 27 to June 23 June 23 to Aug. 13 Aug. 13 to Sept. 2 Sept. 2-22 Sept. 22 to Oct. 21 -- Oct. 21 to Dec. 8 Dec. 8-31
Total Dec. 29, 1980 to Dec. 31, 1981: 183.8 inches
Note: Data in parentheses are estimates based on rainfall at other Kosrae rain gages.
Dec. Jan.Jan.r CD .
Feb. Mar1 lO 1
Mar1 IO 1 .
r\|J 1 .
Apr.
29 to22-27 27 to 11-2424 to 10-2424 to2-29
29 to
Jan.
Feb.
Mar.
r\|J I .
May
22
11
10
2
13
5.11.5 6.1 4 0*t U
.83.3
(5.0)25.2 8.7
1511,2810,5
11,27.(15.0)
55
Table Ik. Cumulative rainfall readings, in inches, at Okat River
[Lat 50 19'18" N., long 162°58'14" E., on left bank of river, a quarter of a mile downstream from Okat River gaging station;
altitude, about 5 ft]
Per iod Rainfall Per iod Rainfal
(Dec. 29-31, 1971 Jan. 25 to Feb. 9 Feb. 9-15 Feb. 15-24 - Feb. 2k to Mar. 9 Mar. 9-21 - Mar. 21 to Apr. 6 Apr. 6-20 Apr. 20 to May 4 May 4-16 -
Jan, Jan, Jan, Feb, Feb. Mar, Mar, Apr. Apr.
8-2828 to Feb.12-20 20 to Mar.6-2727 to Apr.17-24 24 to May 6
12
17
1972
Dec. 29 to Jan. 25 23.44.0) 4.0 5.0 5.011.5 9.019.110.06.05.8
May 16 to June 17 ------June 17 to July 19 -- July 19-26 July 26 to Aug. 14 -- Aug. 14-30 Aug. 30 to Sept. 21 ----Sept. 21 to Oct. 5 Oct. 5 to Nov. 2 Nov. 2-21 Nov. 21 to Dec. 28 (Dec. 28-31
Total for 1972: 213.6 inches
1973
jan. i-i/ -------------Jan. 17-31 Jan. 13 to Feb. 21 Feb. 21 to Mar. 16 Mar. 16 to Apr. 6 -----Apr. 6 to May 1 May 1 to June 12 -Inno 19 tr. lulw Q -_---
*O
5.8 5.0
14.7 1.5
23.0 10.0
(. n
July 9-30 July 30 to Sept. 11 Sept. 11-26 Sept. 26 to Oct. 18 Oct. 18 to Nov. 13 Nov. 13-29 Nov. 29 to Jan. 8 Nov. 29 to Dec. 31 -
Total for 1973: 153.5 inches
1974
(7.5)1.57.8.4
8.011.016.03.06.7
May 6 to June 26 -- 21.7 June 26 to July 9 -- 12.5
July 9 to Aug. 6 -- Aug. 6 to Sept. 5 - Sept. 5-19 Sept. 19-24 Sept. 24 to Oct. 23 Oct. 23 to Nov. 12 Nov. 12-19 Nov. 19 to Dec. 3 Dec. 3 to Jan. 7 ---- (Jan. 1-7, 1975
21.017.8 4.811.0 6.0
20.7 7.3 6.6 3.2
20.4 0)
7.8 18.5 12.09.5 16.73.2
25.0 (17.5)
14.512.7 5.7 3.511.0 5.5 1.0 5.5
25.0 3.0)
Total for 1974: 177-5 inches
56
Table 14. Cumulative rainfall readings, in inches, at Okat River--Continued
Per iod Rainfal1 Period Rainfal1
1975
Jan. 1-7 Jan. 7-28 Jan. 28 to Mar. 10 - Mar. 10 to Apr. 8 Apr. 8-15 Apr. 15-21 Apr. 21-30 Apr. 30 to May 28 May 28 to June 3 June 3-17
3.0 8.619.514.52.42.55.5
21.02.8
11.1
June 17 to July 23 - July 23 to Aug. 12 Aug. 12-28 Aug. 28 to Sept. 25 Sept. 25 to Oct. 7 Oct. 7-18 Oct. 18 to Nov. 24 Nov. 24 to Dec. 2 Dec. 2 to Jan. 8 -- (Jan. 1-8, 1976
Total for 1975: 201.3 inches
1976
22.512.24.011.515.010.516.01.5
22.5 5.3)
Jan. 14 to Feb. 4 ---Feb. 4-18 Feb. 18 to Mar. 2 Mar. 2-16
*- 2.2
- 4.5 q 4j . t
- 11.3
Mar. 23 to Apr. 6 --- Apr. 6 to May 19 -----May 19 to June 3 June 3 to July 14 -
--- -y.t. 3 03.0
o£ n
3.7 50 Q
Note: Data in parentheses are estimates based on rainfall at other Kosrae rain gages.
57
Table 15. Cumulative rainfall readings, in inches, at Helo River
[Lat 5020'32" N., long 162°58'33" E., about 200 ft downstreamfrom Melo River gaging station and 1.3 mi west of Mount Mutunte;
altitude, 20 ft (from topographic map)]
Period Rainfall Period Rainfall
Sept. 15-24 3.0 Nov. 19 to Dec. 3 5-5Sept. 24 to Oct. 15 7-0 Dec. 3 to Jan. 7 20.0Oct. 15 to Nov. 19 8.0
1975
Jan. 1-7 (3-0) July 24 to Aug. 6 10.3Jan. 7 to Feb. 10 9.0 Aug. 6-12 2.5Feb. 10 to Mar. 10 20.5 Aug. 12-28 (4.0)Mar. 10 to Apr. 8 14.0 Aug. 28 to Sept. 25 13-5Apr. 8-15 6.4 Sept. 25 to Oct. 18 14.5Apr. 15 to May 20 18.5 Oct. 18 to Nov. 24 21.5May 20 to June 11 12.0 Nov. 24 to Jan. 6 22.0June 11 to July 24 22.5 (Jan. 1-6, 1976 5.2)
Total for 1975: 189.0 inches
1976
Jan. 6 to Feb. 4 8.3 Mar. 30 to May 5 28.5Feb. 4-12 0 May 5 to June 3 17-3Feb. 12-24 11.5 June 3 to Aug. 3 25-5Feb. 24 to Mar. 9 13-7 Aug. 3-31 17.9Mar. 9-30 25.0
1977
May 19-20 1.4 Sept. 24 to Nov. 22 20.0May 20 to June 18 11.0 Nov. 22 to Dec. 6 1.9June 18 to July 16 16.8 Dec. 6-20 9.3July 16 to Aug. 20 - 13.0 Dec. 20 to Jan. 4 -- 2.0Aug. 20 to Sept. 24 12.0
58
Table 15. Cumulative rainfall readings, in inches, at Melo River Continued
Per iod Rainfal1 Per iod Rainfal1
1978
Jan. 4-19 Jan. 19 to Feb. 3 Feb. 3-15 Feb. 15 to Mar. 15 Mar. 15-31 Mar. 31 to Apr. 13 Apr. 13 to May 24 ~ May 24 to June 21 -----
13.9 3.0 4.6 7.8 3.1
101716.9
June 21 to July 18 10.7July 18 to Aug. 3 6.5Aug. 3-17 6.5Aug. 17 to Sept. 12 8.6Sept. 12 to Oct. 11 18.3Oct. 11 to Nov. 8 9.1Nov. 8 to Dec. 6 21.6Dec. 6 to Jan. 8 21.4
Total Jan. 4, 1978 to Jan. 8, 1979: 180.1 inches
Jan Jan Mar Mar
8-18 18 to Feb. 2 ----- 16-29 29 to Apr. 26 --
Apr. 26 to May 8
Jan. Jan. Feb. Feb. Feb.
5-20 ----- 20 to Feb. 4-10 -----10-26 ---- 26 to Mar. 26 -
1.65.511.426.912.0
July 22 to Sept. 11 20.0Sept. 11 to Oct. 7 4.4Oct. 7-29 5.1
7.3 7.5 2.5 5.7 7.9
1979
1980
1981
May 8 to June 15 -------June 15 to July 17 --- July 17 to Aug. 24 Aug. 24 to Sept. 21 -
Oct. 29 to Dec. 3 Dec. 3 to Jan. 5
Mar. 26 to Apr. 3 Apr. 3-30 Apr. 30 to June 5 June 5-23
16.219.722.19.2
11.016.1
3.73021.322.2
Note: Data in parentheses are estimates based on rainfall at other Kosrae rain gages.
59
Table 16. Cumulative rainfall readings, in inches, at Palusrik River
[Lat 5°16'36" N., long 162°59'08" E., on right bank of Palusrik Riverabout 0.25 mi downstream of waterfall and at beginning of foot trail
to Palusrik Dam; altitude, about 15 ft]
Per iod Rainfal 1
May 6-17 May 17 to June 16 June 16 to July 7 -July 7 to Aug. 3 Aug. 3 to Sept. 1 Sept. 1-15
Jan. 1-4 --------------Jan. 4-26 Jan. 26 to Feb. 10Feb. 10-22 Feb. 22 to Mar. 6 Mar. 6-20 Mar. 20 to Apr. 5 -----Apr. 5-19 -Apr. 19 to May 3 -May 3-17 May 17 to June 16 -----June 16-28 June 28 to July 10 July 10-28
Jan. 4-25 Jan. 25 to Feb. 12 Feb. 12-28 Feb. 28 to Mar. 19 Mar. 19-29 -----------Mar. 29 to Apr. 13
1971
8.526.014.524.816.58.5
1972
(.1)4.83.53.89.48.017.07.86.97.517.32.312.07.9
Total for 1972:
1973
2.5.6
6.32.31.67.1
Per iod Rainfal 1
Sept. 15-28 Sept. 28 to Oct. 19 Oct. 19 to Nov. 18 Nov. 18 to Dec. 6 ------Dec. 6-20 Dec. 20 to Jan. 4 ------
July 28 to Aug. 7 ------Aug. 7-23 Aug. 23 to Sept. 6 -----Sept. 6-19 -------------Sept. 19-30 Sept. 30 to Oct. 3 -----Oct. 3-16 Oct. 16-30 Oct. 30 to Nov. 14 Nov. 14-28 -------------Nov. 28 to Dec. 5 ------Dec. 5-26 Dec. 26-31
183.5 inches
Apr. 13-18 Apr. 18 to May 3 -June 1 1 to July 2 ------July 2-18 July 18 to Aug. 9 ------
15.310.527. 54.32.512.0
14.21.48.116.97.51.5.1
4.52.52.36.88.9(.5)
4.110.55.55.55.0
Note: Data in parentheses are estimates based on rainfall at other Kosrae rain gages.
60
Table 17. Daily and cumulative rainfall readings, in inches,at Malem River
[Rain qage established June 16, 1971 at lat 5°17'13" N.,long 163 01'28" E., in front yard of faculty housing at Malem
Elementary School; altitude, about 10 ft. T, trace]
1971
Day June
12345678910111213141516 *17 *18 *19 *20 *21 *22 *23 *2k *25 *26 *27 *28 *29 *30 *31
Total
July
*****
11.8*JL
*
*
*
*
*
JL
*
*
*
*
*
*
*
*
*
*
*
*
*
*JL
*
*
Aug.
**
17.8***********JL
*
JL
*
*
*
*
*
*
JL
*
*
*
*
JL
*
4.5
Sept.
JL
*
JL
0.4TTT
1.8.7
00*
3.33.5.6
1.6TT
2.83.7.6
0.1
1.3.5T.7
1.6.4.7
24.3
Oct.
0.51.0*.5T.4.3
001.72.2T.2.5.3.3
01.000T.1
0.1
0.4.2T**JL
(9.7)
Nov.
*JL
0.94.1.5.8
0.9
000.2
2.7.8
1.0.1T.3.2.2
01.50.3
0.1.3
1.1T
0
(16.0)
Dec.
0T.8
00T.2.2
0.3.2
000T
0T
0T
00.4.9.3
1.0.1.5.8
2.32.6.5
11.1
* Included in following total. Total June 16 to December 31, 1971: 95.2 inches.
61
Table 17. Daily and cumulative rainfall readings, in inches, at Ma I em River Cont i nued
1972
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan.
0T.7
0.5
000.3
0T
4.91.7.4
0T.9.2T.1.2.2.1
00TT
00.1.3
10.6
Feb.
00T
00TT.3
1.50.1.5.6
00T.3
00.6
1.2.9.4.4
1.2.5
2.9.5.5
12.4
Mar.
0.11.1.6
0.3.8TT
02.8.3
0.3.5.6
2.11.2T.6.1.4
1.6T.3
1.2.5T
05.0.6
1.5
22.5
Apr.
0.7.8
2.0.1.7
0001.1.9.5T
01.30.6
1.2.2
0T
3.2.9
1.3T
00000T
15.5
May
1.01.0T1.8.4T.1.2.5
1.1.2T.1.3.2
1.11.2.2.7.1
3.3.1T.1
1.7.5.2
3.8.5
3.62.0
26.0
June
0.7T.2
0T
0.5
00.5
00T.1.8T
0.1
1.1000T.3
1.8T
0.3
1.1.6
8.1
July
1.81.7.4.4
4.31.8TT
0.3
0T.9.2
00.2
1.0.9
1.6.5
1.2T.5.9.3
1.12.1.5
1.3.2
24.1
Aug.
T02.0T
6.51.42.6.4.8.9.2
0T
0TT
00001.3.1
01.401.2TT
0.4T
19.2
Sept.
3.4**
2.41.1.2.4.5.9T
7.0.1
1.4.1.1
00000001.80.2.4
004.70
24.7
Oct.
T.1T
0.7.2
00000000T
0T
000.5.4.1.5.4.6T1.9.4T
0
5.8
Nov.
T0.1
0.1
1.7.1
0T
0000T
0000000000.3.4
1.01.0.7.6
6.0
Dec.
0.9*
3.50.2
0T
0.1
000000.1TT1.01.60.5.1.4
2.1.5TT
0T
0
11.0
* Included in following total. Total for 1972: 185.9 inches.
62
Table 17. Daily and cumulative rainfall readings, in inches,at Malem River Cont
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan.
0.1000T.3
000T
00.5T
0.6
0000.3
01.0.1
0.9
0T
00T
3.8
Feb.
0TT
00.1T
0T
00.2T
0T
00T
000.1
1.22.51.2.8T.7
6.8
Mar.
0.2TT
000.2.1
00.4
00.6
1.7.1
000T
0.3
1.2.1.1.3T.5
000
5.8
Apr.
T00TT
02.2T
2.80.5
2.01.1.6
0.8.8
1.52.7T1.00.1.4T.1
1.5T.9.5
19.5
1973
May June
4.4T
0JL __
*
2.4.4
0.3
1.12.42.60.1
1.7.5T.6.3T
0*
1.1.2JL __
JL __
*
.50.4
0* /
19.0 -9.1
inued
July Aug.
0
0
00
0
1
0
000
0
0
10
.5
.4
.8
.2
.8
.6
.7
.3
.5
.0
.6
.9
.1
.3
.4
.3
.6
.2
.4
.3
.1
* /.0 -21.4
Sept.
0.501.02.50.8.4
1.00T.3
00.8
3.3.3
002.800.2
0.2.1
03.0.2
00
17.4
Oct.
000.2.5
1.50.3.2
6.0.2.1.4
1.100.3
0000.4
00.8
1.2.2
0.1
00
13.5
Nov.
000.2
2.0.2.8.9.5
1.0.5.3.1
0001.00.3.3
1.5.2
000.2
0000
10.0
Dec.
0001.0.8
1.2.1.5.3
1.00.8
1.2.5
0.2.5.4.7
1.80.5.4
1.0.5.3.5.7.3.5
1.5
17.2
MIncluded in following total.
Rainfall totals from Sansruk rain gage. Total for 1973: 153-5 inches.
63
Table 17. Daily and cumulative rainfall readings, in inches,at Malem River--Cont inued
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan.
2.001.502.5001.50000000001.500.1
1.0.1
00000000
10.2
\j
Feb.
00.2.4
0001.1.5.1
0.3.2
000000.4
1.15.500.5
001.1
11.4
'1974
Mar.
002.5.9
1.6.6
0.3
001.5.1
1.200.6
01.0.1
000.5.7
0000.1
1.52.0
15.2
Apr.
1.0.1.7.2.2.1.2.6.3
1.01.51.7.9.4
1.20.2.1
00.7
0.4
1.201.0001.91.3
16.9
Total January to April 1974: 53.7 inches
No record available, May to December.
64
Table 17. Daily and cumulative rainfall readings, in inches, at Malem River Continued
Per iod Rainfal 1 Per iod Rainfall
1978
Dec. 20 to Jan. 5 -- Jan. 5"l6 -------------Jan. 16-30 Jan. 30 to Feb. 2 Feb. 2-14 Feb. 14-27 Feb. 27 to Mar. 13 Mar. 13-27 Mar. 27 to Apr. 10 Apr. 10-24 Apr. 24 to May 22 -- May 22 to June 5 June 5-19
2.414.95.2.1
2.0 6.3 7.7.4
8.6 3.9
11 8 3.4 6.1
June 19 to July 3 July 3-17 July 17-31 July 31 to Aug. 14Aug. 14-28 Aug.SeptSeptOct.Oct.Nov.Nov.
28 to Sept. 11 , 11-26 , 26 to Oct. 10 10-23 23 to Nov. 6 - 6-20 20 to Dec. 4 - 4 to Jan. 2 --
Total Jan. 5, 1978 to Jan. 2, 1979: 154.0 inches
1979
Jan. Jan, Jan. Feb, Feb, Mar,
2-15 ---- ---15-31 ----------31 to Feb. 12 12-26 26 to Mar. 12 27 to Apr. 9
Apr. 9-23
Dec. 27 to Jan. 23 Jan. 23 to Feb. 4 ----- Feb. 4-20 Feb. 20 to Mar. 3 Mar. 3-17 Mar. 17 to Apr. 14 Apr. 14 to May 12 May 12-27 May 27 to June 9 June 9-24 June 24 to July 7 July 7-14
.9 4.13-7 8.312.3 7.311.7
10.22.53.46.58.813.310.711.510.312.83.23.2
Apr. 23 to May 7 May 7 to June 11 June 11-25 June 25 to July 9 July 9-23 July 23 to Aug. 6
1980
July 14-21 July 21 to Aug. 4 - Aug. 4-18
18 to Sept. 4 4-16 .16-29 29 to Oct. 27
27 to Nov. 10 10-12 12 to Dec. 1 - 1-15 - -----
Aug. Sept Sept Sept Oct. Nov. Nov. Dec.Dec. 15-29
6.8 2.1 4.8 6.2 3.5 6.3 6.54.54.6 4.8 7.5 6.6 19.4
8.219.18.55.62.811.6
1.1 5.8 2.9 3.9 3.9 5.24.96.9.4
4.510.97.7
Total Dec. 27, 1979 to Dec. 29, 1980: 154.5 inches
65
Table 17. Daily and cumulative rainfall readings,at Malem River Continued
in inches,
Per iod Rainfal1 Per iod Rainfal1
Dec. Jan.Jan. Feb.MarI la i .
MarI la i .
Mar.
29 to19-27 27 to 24 to10-2323-31 31 to
Jan.
Feb. Mar.
Apr.
19
11 10
29
---- 7.3 2.05.3 1.0 4.3 6.7
23.6
1981
Apr. 29 to May 12 6.3May 12-26 12.8May 26 to June 23 12.1June 23 to Aug. 12 >30.0Aug. 12 to Sept. 1 9.2Sept. 1-23 7.2Sept. 23 to Oct. 28 10.0
66
Table 18. Cumulative rainfall readings, in inches, at Tofol River
[Lat 5°19'09" N., long 163 O00'22" E., on left bank 100 ft west ofTofol River gaging station (16899800) and 1.2 mi northeast of Mount Finkol;altitude, 100 ft (estimate from stadia survey to nearby gaging station)]
Per iod Rainfal1 Per iod Rainfal1
1971
Apr. 26 to May 16 May 16 to July 8 ------July 8 to Aug. 2 ------Aug. 2-31 Aug. 31 to Sept. 14 Sept. 1**-27
Jan. 1-6 - --- -- Jan. 6-17 --- - - Jan. 17 to Feb. 7 -----Feb. 7-28 Feb. 28 to Mar. 13 Mar. 13-27 Mar. 27 to Apr. 10 Apr. 10-25 Apr. 25 to May 9 ------May 9 to June 8 -- -----June 8-22 June 22 to July 6 -----July 6-17
Jan. 1, 2 Jan. 2-16 -------------Jan. 16 to Feb. 1 -----Feb. 1-27 Feb. 27 to Mar. 14 -Mar. 14 to Apr. 2 -----Apr. 2 to May 2 -May 2 to June 13 ------June 13 to July 3 -----July 3 to Aug. 7 ------
17.826.812.213.58.512.0
1972
(3.0)8.1.4
15.28.49.014.912.24.8
21.52.8
14.34.0
Total for 1972:
1973
.31.41.38.71.63.8
20.517.512.017.5
Sept. 27 to Oct. 20 12.320 to Nov.Oct,
Nov. Nov. Dec. Dec. 27 to Jan. 6
26 to Dec. 15-27
15
207.2 inches
Aug. 7-22 Aug. 22 to Sept. 20 Sept. 20 to Oct. 3 ----- Oct. 3-30 -- Oct. 30 to Nov. 12 ----- Nov. 12-26 Nov. 26 to Dec. 10 ~ Dec. 10 to Jan. 14 ----- (Dec. 10-31
12.5 8.5 1.9 5.2 9.6
July 17-22 July 22 to Aug. 3 ------Aug. 3-15 Aug. 15-29 -------------Aug. 29 to Sept. 13 Sept. 13-26 -Sept. 26 to Oct. 10 -Oct. 10-22 Oct. 22 to Nov. 13 -----Nov. 13-27 Nov. 27 to Dec. 12 -----Dec. 12 to Jan. 2 (Jan. 1, 2, 1973
(3.5)16.58.51.4
18.33.68.95.54.12.08.28.4.3)
9.518.53.114.58.02.05.0
22.011.2)
Total for 1973: 156.4 inches
67
Table 18. Cumulative rainfall readings, in inches, at Tofol River Continued
Period Rainfal1 Period Rainfal1
Jdii . i - in Jan. 14-31
Feb. 11-19Feb. 19 to Mar. 8-19
Mar. 19 toApr. 2-9 --Apr. 9-17 -Apr. 17-23Apr. 23 to
Jan. 1-6 Jan. 6-29 -
Jan. 29 to Feb. 11-18
Feb. 18 to Mar. 12-18Mar. 18-31
Mar. 31 tor"Vp 1 . 1 ~ t«J
Anr 9fl * «
ij _ _ OMar. o ---
Apr. 2
May 6
Feb. 11
Mar. 12
Apr. 14 -
Mav/ 97 ___
1974
May 6-20 May 20 to July 1 - July 1 to Aug. 13 Sept. 6-18 Sept. 18 to Oct. 8 Nov. 14-29 Nov. 29 to Dec. 12 Dec. 12-27
27 to Jan. 6
1975
(10.8) 2.85.7 9.0 5.4 8.0 2.49.3 1.0 7.6
(2.5) 8.8 .2
8.3 8.5 5.5 2.6 6.0 7.519.5
Total for 1975: 238.7 inches
1976
Dec. 30 to Jan. 13 13-5JdH .
Jan. Jan. Feb. Feb. Feb.Mar
\ }~ £.\J
20-31 31 to5-10 - 10-25 25 toft-31 .
Feb.
Mar.
5
5 5
0 12-- 11
97
. U
.4
.8
.5
.8c
Mar. 31 to Apr. 13 Apr. 13-29 Apr. 29 to May 13 May 13 to June 18 June 18-28 June 28 to July 26 July 26 to Aug. 10
1978
Jan. 6-17 13.7Jan. 17-31 4.6Jan. 31 to Feb. 16 2.3Mar. 14-28 .5Mar. 28 to Apr. 12 7.9Apr. 12-25 4.0Apr. 25 to May 22 12.3May 22 to June 6 4.4June 6-20 6.1
68
June 20 to July 5 - July 5-20 July 20 to Aug. 1 - Aug. 1-15 Aug. 15-29 Aug. 29 to Sept. 14 Sept. 14-27 Sept. 27 to Oct. 12 Oct. 12-25
25.026.216.011.54.512.020.03.0
ridy £.1 to «JUMC ID ------June 16-30 -------------June 30 to July 29 -----July 29 to Aug. 8 Aug. 8-21 Aug. 21 to Sept. 16 - - Sept. 16 to Oct. 17 Oct. 17 to Nov. 17 -----Nov. 17 to Dec. 22 ----- n of- 99_7n ___ __ _
l^O
9.5 21.0 9.5 16.5 21.0 17.5 21.525.5 ic n
5161218.67.910.68.8
8.2 3.8 2.4 4.1 1.6 6.6 6.2 4.6 5.8
Table 18. Cumulative rainfall readings, in inches,at Tofol River Continued
Period Rainfall
Feb. 1-13 Feb. 13 to Mar. 2 Mar. 2-12 ------------M-, r 1?-?7 ----- ---I Id 1 1 £. *- /
Mar. 27 to Apr. 12 -Apr. 12-25 Apr. 25 to May 9 May 9 to June 12
Jan. 1 to Feb. 28 Feb. 28 to Mar. 20 - Mar. 20 to Apr. 15 Apr. 15 to May 1 ------May 1-13 May 13-28 May 28 to June 10 -June 10-25 June 25 to July 9 -Inlw Q-9/1 _----.-_-._--
Jan. 2-22 _ o o o OJan. 22-2o - - Jan. 28 to Feb. 13 F*ah 17-9b ------- _ _--
Feb. 24 to Mar. 12 - Mar. 12-25 Mar. 25-31 Mar. 31 to May 1 Mav 1-12 ------------i id Y I i «-
1979
3.1 14.2 4.2 14.8 9.5 9.0 8.2 13.0
1980
(18.0) 10.18.9 10.113.1 10.0 13.0 14.1 2.9 5.1
Total for 1980:
1981
6.5 4.5 4.4 3.2 1.1 7.0.5
23.0 5.0
Total for 1981:
Period Rainfall
June 12-26 -------------June 26 to July 10 -----July 10-25 July 25 to Aug. 13 Aug. 13-23 Aug. 23 to Sept. 6 Sept. 6-21 Sept. 21 to Oct. 2
July 24 to Aug. 5 ------Ann C-91 --------------
Aug. 21 to Sept. 5 -----Sept. 5-30 -------------Sept. 30 to Oct. 28 Oct. 28 to Nov. 13 Nov. 13 to Dec. 5 ----- -Dec. 5-16 Dec. 16 to Jan. 2 ------
161.5 inches
May 12-28 May 28 to June 24 June 24 to Aug. 12 -----Aug. 12 to Sept. 3 C on f 7-97 -------------oept . .5-0 Sept. 23 to Oct. 21 f\r+ 91-9Q -------------UCt. £. 1 Lj -- ---
Oct. 29 to Dec. 9 ------ Dec 9-31 - ----lx Cl* J J 1
175.2 inches
8.9 5.2 6.5 10.5 6.7 .6
7.5 2.5
5-7 2.23.3 1.5 7.1 10.3 6.8 12.0 7-3
17.0 8.5
27.9 9.6 8.7 5.1 3.2
20.0 (18.0)
Note: Data in parentheses are estimates based on rainfall at other Kosrae rain gages.
69
Table 19. Daily rainfall readings, in inches, at Sansruk
[Rain gage established Sept. 1, 1971 at lat 5°19'10" N., long 163°01'31" E., at grounds of Agriculture Department
at Sansruk; altitude, 5 ft. T, trace]
-7 1971
Day Sept. Oct. Nov. Dec.
12345678910111213141516171819202122232425262728293031
Total
T.2T.2.3.2.1
3-9.1.2
0T
3-3T1.41.6TT
05.1.7T.3
1.0.2T.9
2.3T.1
22.1
1.0 5.1
1.5T.2
00T1.93.6.5T.2.2TT1.9000T
0TT1.2T.2T.5
1.2
14.7
0.304.03.6.8.2.1.2
000TT
2.61.3T.3.1
0.7
1.03.1T.1T.4.8.9
1.20
21.7
T.2TT
0.1T
0.1
0.2
00000000000.2
1.1.5
01.7.4
1.32.21.9
9.9
No record available, January to August. Total September to December 1971: 68.4 inches
70
Table 19. Daily rainfall readings^ in inches, at Sansruk--Continued
1972
Day
123456789
10111213141516171819202122232k25262728293031
Total
Jan.
2.02.52.6TT
00.3
0.1.2
5.51.1.2.3.2.4.2
0.1.1.3.3
0000000.4
16.8
Feb.
00.2
000.4.1
1.01.70T.6.5
0T.3
0000.3.8
2.4.9.4
1.4T
3.4
14.4
Mar.
0.3.4.2
000.4.1.1
1.73.3T
1.2.5.4
1.11.30T1.20.6
1.901.6T.4T
2.32.8.3
22.1
Apr.
1.31.03.51.7.1T.8T.5
1.02.91.0.1
0.4
01.7.9.3TT
2.41.41.0.2.2.7
000
23.1
May
01.21.202.2.5.1
0.2.3.3
0T.4.1
0.2.1.3
1.5.1
3.3.1.1.3.4.7.2
4.5.6
4.4
23.3
June
1.90.4T
000.3T
0.5.7
0T
01.4.2
01.9.2
00.2.6.2.1
0.5.8.5
10.4
July
2.01.0T.3.2
4.21.7.2
000.2
1.0.2
00.5.7.2
2.5.2.6.1.3
1.0.1.9
2.3.2
1.2.6
22.4
Aug.
0.1.1
2.1.1
1.41.03.1.1.4
1.6.1
0.1
000.1
00.1.4
001.40.9
00000
13.1
Sept.
0.12.4.4
1.5.7
1.0.2.3
1.2T
06.5.2.9.1
00T
000.1
2.20.2.2
0.3
4.90
23.4
Oct.
0.1.2
1.400.7.5
00000000T
0.1T
00T
0.6.2.7
1.9.1
2.01.0.1
9.6
Nov.
00.2
0001.2.5
0.1
0000.7
00000000.1T.6.9
1.51.3.1
7.2
Dec.
0.41.71.80000T
01.2.1
000000.1.7
1.32.00.1T.5
2.2.3
0T
0T
12.4
Total for 1972: 198.2 inches.
71
Table 19. Daily rainfall readings, in inches, at Sansruk--Continued
[Rain gage relocated to Lelu, Nov. 1, 1973; discontinued, Dec. 31> 1973]
1973
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan.
T.3
00TT.3
000.1
00.5
00.4
00.3.2
0.2T
0.5T
0000
2.B
Feb.
000000.1.2
000.5
000000000T.7.1
2.12.01.20
6.9
Mar.
0.2.2T.6
000.2.1
00.7
00.5
1.4.2
00000.2
1.4.2.4.5.3
000
7.1
Apr.
0000.2.3
02.5.1.8.1
1.5.8
1.1001.3.6
i.o3.40.9
0.3
1.0001.300
17.2
May
1.41.41.5.2.9.1.2.3
0.4
1.11.72.3.1.7
2.3.2.2.7
0.4
00.7
1.000.1
000
17.9
June
0.90T1.01.8.1
0.3
00.3
1.1.1
1.6T
00.2T
0A.1T.5
0.2.2.3
00
9.1
July
0.7.4
1.5.3
00.1
0.5.6.9.9JU
**
3.20000.2T
002.5000.2
0.5
12.5
Aug.
T.2.6.7.9.1
1.2.4
001.10002.0T.1
1.33.3.4
1.5T
2.82.80000002.0
21.4
Sept.
0001.5002.21.2.1.1.2
0002.83.0003.6.1
0T
0.1
00002.60
17.5
Oct.
00.1
003.00.2.3
3.000.9.1T.3.2.4
000.6.5
0.8.9TTT1.50
12.8
Nov.
00001.01.5.3
0.4
1.0.7
1.5000.2.3
0.8.2.3.4
000.3
0000
8.9
Dec.
0002.5.5
0.3.2
0.2
0.6.5.2.2
01.0.9
1.41.5.7
000.5.3
01.01.201.0
14.7
Total for 1973: 148.8 inches.
72
Table 20. Daily rainfall, in inches, at continuous-recordrain gage at Srono
[Station establishedlong 162°
al ti
Day June
123456789
10111213141516171819202122 023 024 1.0625 1.0626 027 .0428 029 .2330 031
Total
59'33" E.,tude, 330
July
0.641.25.16
1.300.70.23
0.24.68.70.83
1.34.06
1.37.58
1.50.77
2.342.03.80.34.04
0.47.37.89
1.50***JL
June 22,1 . 1 mi
ft (from
Aug.
**
4.12.04.17.01.38.10.02.32.22.07.14.64
3.01.01.70
6.912.980.50.20****JL
*
*
*
10.4
(52.07)
1982 atsouth of
lat 5°19'43" N,Mount Mutunte;
topographic map)]
1982
Sept.
IV 54.48
1.001.782.12.85.58.07.07.10.01
000001.55.18
1.680.32.07.86.76.04
1.151.92.91.06
0
17.10
Oct. Nov.
0.13 0.02.26 0
0 01.87 0.11 .14.02 .30.64 .25.23 1.07.11 .13.06 .71.02 1.32.14 .36
1.19 3.732.89 .131.63 .06.17 .01
0 *0 *.12 *.19 *.44 *.11 .97
0 0.55 0.02 .14
0 00 .23.01 0.04 0
0 00
10.95 9.57
Dec.
0.04.52
0.64.46.06.14.37.41.02.05.32
1.19.22.59.42.48.24
0.22.06.20.31
0.22.70.25
00.06.16
6.35
* Included in following total.
- Rainfall for Sept. 1, 0000-1100, included in August total
73
Table 20. Daily rainfall, in inches, at continuos-record
rain gage at Srono--Conti nued
1983
Day
123456789
10111213141516171819202122232425262728293031
Total
Jan.
0.01.22
0.86.04.10
0.06
00000.01.01.01
0000000.34
0000.08
00
1.74
Feb.
0000.67.04
00000000000.38.08.07
0000000.08
1.32
Mar.
0.42.37
0000000000.16.07
00000000000000000
1.02
Apr.
0000000000000.56.17
00000.01
1.921.68.01.08
00000
4.43
May
0000.37
1.031.57.02
1.32.36
1.18.76.89
3.18******
1.681.26.12.07
0 " "
* Included in following total.
74
Streamflow Records
Gaging stations
Table 21. Streamflow records for Mutunte River (16899500)
[Figure 21]
Location; Lat 5°21'^5" N., long l62°59'20" E., on left bank at dam,
0.6 mi upstream from mouth, and 1.2 mi north of Mount Mutunte.o
Drainage area; 0.52 mi .
Period of record; May 1971 to September 1982 (discontinued).
Gage; Water-stage recorder and concrete control. Altitude of gage is
^6 ft from stadia survey.
Remarks; Records fair. Until 1972, water was diverted from diversion
dam at station through a ^-in pipe for domestic use in Tafunsak.
Since 1972, water has been diverted from dam 0.3 mi upstream from
station through an 12-in pipe for use in Tafunsak. Water-quality
analyses and periodic determination of water temperature are published
elsewhere in this report.
Average discharge; 11 years, 5.63 ft^/s (^,080 acre-ft/yr).
Extremes for period of record; Maximum discharge, 1,^30 ft /s July 16,
1976 (gage height, 2.9^ ft), from rating curve extended above 1^03 3 ft /s; minimum, 0.15 ft /s Feb. 15, 1980, during short regulation
of flow.
Discharge measurement made after the end of continuous discharge record;
Oct. 20, 1982 1.2 ft3/s.
75
Figure 21. Mutunte River gaging station (upstream view during medium flow).
76
Table 21. Streamflow records for Mutunte River Continued
A. Annual maximum discharge (*) and peak discharges
above base (600 ftVs)
(Discharge in cubic feet per second, gage height in feet)
Date
July 6, 1971 Aug. 6, 1971
Feb. 27, 1972Mar. 31, 1972 -Mav 31 1Q7? ------i lay j i , tj/f.
July 5, 1972 -Sept. 11, 1972
Ann 14 137^ -----r\uy . n , ij/j
Sept. 26, 1974 -
May 6, 1975 -
Feb. 22, 1976 Mar. 11, 1976 -Mar 17 1Q76 -----i la i 4.4. ^ i_7/^
July 16, 1976 -Aug. 2, 1976 -Sept. 8, 1976 -
Nov. 18, 1976 -
Dec. 16, 1977 -
ou i y £.1 , ij/j
Ort 6 1Q7Q ---.VJt, U . O, 'J/J
May 9, 1980 -
Nov. 3, 1980 -Apr. 27, 1981 -June 28, 1981 -
Nov. 10, 1981 -Nov. 15, 1981 -Jan. 30, 1982 -Mar 17 1Qft9 __.
Time
--- 1300--- 1300
2200 2300 0530 1700 1730
0730
0330
1 ~l 1 C1/15
0045 1615 1130 1145 1615 0800
1530
0045
1100
1730 0115
2000--- 1100 -- 2100
1700 1630 2100.__ 9?nn
Di scharge
*1,110 740
607 770 620 755
*1,290
* 770
* 581
* 380
914 770 740
* 1,430 806
1,070
* 607
* 594
* 529
695 * 932
788 896
* 970
607 *1,030
695R-i£
Gage height
2.78 2.58
2.49 2.60 2.50 2.59 2.87
2.60
2.47
2.30
2.68 2.60 2.58 2.94 2.62 2.76
2.49
2.48
2.43
2.55 2.67
2.59 2.67 2.69
2.49 2.74 2.55«> ££
77
Table 21. Streamflow records for Mutunte River Continued
Water year
1971-7
1972
1973 1974
1975
19761977
19781979
1980
1981
1982
B.
June
Feb.
Apr.
Feb. Ma
Nov.
May
Aug.
Oct.
Feb.
Mar.
Apr.
Apr.
Annual minimum discharge in cubic feet per second
Without regulat ion
Date D
3, Aug. 3, 1971 -8, 9, 1972
2_r 1Q77 _______
6, 7, 16-20, r. 22-28, 1974
20, 21, 1974
29-31, 1976
5, 1977 lli 1Q77 ________ ^ , i Ji 1
5 1Q7Q __ ______, ly/y - ----
1 2 1<}81 - ---1 , f. , 1 JU 1
12, 1982
ischarge
3.3
1.7
2.0
2.0
2.0
1.2
.88
.64
.35
.64
.24
During short regulat ion
of flow at dam
Date
Aug. 24, 1975
Mar. 17, 1976
July 10, 1978
Jan. 10, 1979
Feb. 15, 1980
Discharge
0.96
.60
.68
.40
.15
May to September 1971-
C. Discharge measurements, in cubic feet per second, made at upstream diversion dam
[Lat 5021'31" N., long 162059'27" E., at altitude 180 ft (from topographic map)]
*«|-'
Oct.kj _.Mar .
**\j 1 .
MPV /i ia y t
1 1 mo
1,
30, 1 pIB,
14IH >
m
Date
1981
1981
1982 (raining) 1982
1Qfi9 _________ __
Upstream from dam
1.7
2.7
8 c
3-3 3 Qj.O
? n
DischargeDownstream from dam
11.6
1.7
1 L
78
Tabl
e 21
. St
ream
flow
re
cord
s for
Mutunte
Rive
r--C
onti
nued
D.
Mon
thly
an
d an
nual
dis
char
ges
, in
cu
bic
fe
et
per
seco
nd
1971
Tot
al
Mea
nM
ax.
Min
.
1972
To
tal
Mea
nM
ax.
Min
.
1973
To
tal
Mea
nM
ax.
Min
.
1974
Tot
al
Mea
nM
ax.
Min
.
1975
Tot
al
Mea
nM
ax.
Min
.
1976
To
tal
Mea
nM
ax.
Min
.
1977
Tot
al
Mea
nM
ax.
Min
.
Cal
enda
r y
ear
-- -- --
2,48
5.7
6.79
831.
8
1,93
*. 6
5.30
431.
4
2,1*
9.5
5.89
49 2.2
2,36
7.*
6.49
50 2.3
2,8
20
.3 7.71
150 2.
0
1,54
4.04
4.23
65.9
8
Jan.
158.
9
5.1
322 2.
5
63.5 2.05
2.5
1.7
136.
0
*.39
19 2.3
165.
0
5.32
25 2.6
1*5.
9
4.71
32 2.3
77.1 2.49
11 1.8
Feb.
190.
1
6.56
33 1.9
96.2 3.**
18 1.5
128.
1
*.58
37 2.2
20*4
.5
7.30
*2 2.6
246.
2
8.4
979 2.
3
68.6 2.45
6.5
1.7
Mar
.
309.
7
9.99
35 3.0
85.2 2.75
7.6
1.5
186.
0
6.00
35 2.3
197.
*
6.37
28 2.8
327.
*
10.6
51 2.4
179.
1
5.78
261.
3
Apr
.
256.
2
8.5*
23 3-0
187.
8
6.26
251.
*
208.
3
6.9*
25 2.5
151.
6
5.05
16 2.5
258.
8
8.63
35 2.8
25*.
7
3-*9
65 2.6
May
306.
2
9.8
833 3-
5
278.
7
8.99
50 3.2
22
2.*
7-17
3* 2.2
156.
0
5-03
21 2.6
198.
8
6.*1
50 2.5
167.
5
5.40
20 2.0
236.
9
7.6*
591.
9
June
216.
5
7.22
19 3-3
125.
*
4.18
17 2.6
101.
4
3.38
11 1.8
170.
0
5.67
21 2.6
198.
3
6.61
16 2.7
240.
1
8.00
503.
1
83.8 2.79
7.3
1.8
July
277.
5
8.95
36 3.8
297.
5
9.60
42 2.7
106.
9
3.45
12 2.0
168.
7
5.**
21 2.5
236.
3
7.62
** 2.6
181.
4
5.85
65 2.3
94.4 3.05
10 1.5
Aug
.
226.
7
7.31
48 3.3
165.
4
5-34
24 2.8
255.
8
8.25
43 2.3
162.
3
5.2
415 2.
3
210.
2
6.7
821 2
.6
232.
0
7.4
854 2
.6
113.
7
3-67
16 1.3
Sep
t.
272.
3
9.08
34 3.7
301.
2
10.0
83 2.6
229.
4
7.65
42 2.3
198.
2
6.61
27 2.5
115.
1
3.84
24 2.4
329.
7
11.0
150 2
.8
157.
5
5.25
601.
6
Oct
.
196.
86.
3520 3
.2
134.
44.
3416 2.
3
197.
36.
3641 2.
5
150.
94.
8716 2.
4
207.
26.
6835 2.
3
190.
56.
1515 3.
7
60.8
61.
9614
.98
Nov
.
267.
08
.90
43 3-5
111.
13
.70
18 1.8
165.
25.
5124 2
.6
126.
84.
2317 2
.3
155.
45.1
843 2
.4
249.
18.
3038 3
.9
90
.78
3.03
17
0 9
8
Dec
.
176.
65
.70
33 2.9
157.
15.
0717 2.
3
223.
57.
2131 3
.0
358.
211
.649 2
.8
327.
610
.634 2
.8
251.
78
.12
35 3.5
126.
64.
0857
1.0
Wat
er
yea
r __ -- --
2,7
23
.5 7.4
483
1.9
1,7
51.2
4.80
431.
4
2,0
99.6
5.75
41 2.2
2,3
13
.1 6.34
502.3
2,8
19
.2
7.70
150 2
.0
1,95
7.1
5.36
651.
3
Table
21.
Streamflow records
for
Mutunte
River--Continued
00 o
D.
Month
ly
and
1978
T
ota
l
Mea
nM
ax.
Min
.
1979
Tota
l
Mea
nM
ax.
Min
.
1980
Tota
l
Mea
nM
ax.
Min
.
1981
Tota
l
Mea
nM
ax.
Min
.
1982
Tota
l
Mea
nM
ax.
Min
.
Ca
len
da
r ye
ar
1,4
60
.28
4.0
040
.98
2,0
72.
445.
6856
.78
1,64
2.11
4.49
78.3
5
1,85
1.63
5.07
81.6
**
__
Jan.
16
6.0
5-3
522
1.3
61.6
5
1.99
11.9
5
96.2 3.10
11 1.2
94.6
2
3.05
13.7
8
354.
6
11.4
47 2.1
Fe
b.
79.4 2.84
12 1.5
137.
89
4.92
36.7
8
120.
28
4.15
42.4
9
67.5
8
2.41
13.7
8
12
8.2
4.58
461.
6
Mar
.
103.
0
3.32
221.
3
338.
2
10.9
491.
5
146.
06
4.71
26.3
5
58.2
8
1.88
17.7
8
284.
4
9.17
341.
4
Ap
r.
142.
1
4.7
435
1.8
264.
6
8.82
29 2.7
102.
79
3.43
25.7
1
223.
81
7.46
70.6
4
120.
24
4.01
14.6
4
an
nu
al
dis
ch
arg
es
May
14
8,6
4.7
922
1.9
222.9
7.19
34 3.0
245.
3
7.91
781.
4
231.
2
7.46
351.
0
114.
1
3.68
11 1.4
June
103.6
3.45
9.0
2.1
237.
6
7.92
31 2.5
278.
2
9.27
47 2.1
207.
4
6.91
471.
6
106.
66
3.56
21.7
1
, in
cubic
fe
et
pe
r se
con
d C
on
tinu
ed
Ju
ly
91.2
2.9
420
1.1
128.6
4.1
515 1.
8
125.
4
4.05
10 1.5
160.
25
5.17
33.7
1
212.
0
6.84
21 2.1
Aug.
64.4
2.0
810 1.
1
152.7
4.9
315 2
.0
97
.1
3.1
3171.5
12
8.3
4.1
038
1.3
218.
4
7-05
301.
6
Sep
t.
135.
6
4.52
341.2
95.4
3.18
18 1.2
81.3
5
2.71
10.9
5
99.0
0
3.19
15 1.4
12
2.2
4.07
14 1.3
Oct
.
54.5
81.
7612
.98
178.
95.
7756
1.6
60.2 1.94
7.2
1.2
80.3
42.
5911
.86
__
Nov
.
155.
35.
1828
1.3
129.
804.
3320
90
119.
743.
9933
.86
267.
28.
9181
1.0
__
Dec
.
21
6.5
6.9
840
1.8
12
4.2
4.0
120
1.3
16
9.4
95.4
734
.71
229.8
7.4
126
1.4
._ --
Wate
r ye
ar
1,3
12.1
4
3-5
957
.98
2,0
65
.92
5.6
649
.78
1,7
25
.58
4.7
178
.35
1,6
19.8
7
4.4
470
.64
2,2
38
.14
6.1
381
.64
Table 22. Streamflow records for Okat River (16899600)
[Figure 22]
Locationi Lat S0^ 1 !! 11 N., long 162°58 I 19 11 E., on left bank 0.6 mi upstream
from mouth and 1.9 mi northwest of Mount Crozer.2 Drainage area; 1.9** mi .
Per iod of record: July 1971 to September 1982 (discontinued).
Gage; Water-stage recorder. Altitude of gage is 13 ft, from topographic
map.
Remarks; Records fair. No diversion above station. Water-quality
analyses and periodic determinations of water temperature are published
elsewhere in this report.
Average discharge; 11 years, 22.2 ftvs (16,080 acre-ft/yr).
Extremes for period of record; Maximum discharge, 1,060 ft /s Aug. 2, 1976
(gage height, 8.22 ft), from rating curve extended above 230 ft /s;
minimum, 1.4 ft^/s Mar. 11, 1977.
A. Discharge measurements, in cubic feet per second, made outside the period of continuous discharge record
Date Discharge
May 25, 1971 37June 9, 1971 15Oct. 19, 1982 9.3Mar. 9, 1983 .74
81
Figure 22. Okat River at gaging station (view upstream)
82
Table 22. Streamflow records for Okat River Continued
B. Annual maximum discharge (*) and peak discharges
above base (700 ft^/s)
(Discharge in cubic feet per second, gage height in feet)
Date
July 6, 1971
May 22, 1972 -
Sept. 15, 1973
Apr. 11, 1974
r\or i iQ7/i ______uec. /, iy/*T ---
Mar. 22, 1976 Apr. 21, 1976 -June 18, 1976 Aug. 2, 1976
Sept. 8, 1977 -
July 4, 1978 Sept. 10, 1978 -Sept. 21, 1978
Mar. 1, 1979 Mar 1^ 1379 ---1 Idl . >Jj J / JJulv Ik 1Q79 ouiy * «, i j 1 j
Oct. 6, 1979 May 9, 1980 June 8, 1980 June 12, 1980 -
Nov. 3, 1980 Apr. 27, 1981 June 25, 1981 July 3, 1981 Aug. 30, 1981
Nov. 10, 1981 -Nov. 15, 1981 Mar. 13, 1982 -Mar. 15, 1982 Aug. 18, 1982 -Ann 9li 1Qtt? .
Time
1300
0600
1900
1330
1400
1230 1200 2330 1615
0500
1530 0230 0300
1430 0930 1100
1800 0130 0230 2130
2000 1000 -- 2100 0400 0600
1700 1600 2300 0630 0100
nAnn
Discharge
* 680
* 775
* 559
* 601
* 560
878 720 728
*1,060
* 680
* 768 754 742
705 730
* 734
788 * 805
754 701
820 * 930
792 772 895
908 *1,040
766 728 79079A
Gage height
7.14
7.70
6.36
6.64
6.37
7.35 6.90 6.84 8.22
6.45
6.29 6.22 6.16
6.62 6.75 6.77
7.04 7.12 6.95 6.68
7.18 8.00 7.16 7.06 7.42
7.53 8.02 6.93 6.74 7.05A 7?
83
Table 22. Streamflow records for Okat River Continued
C. Annual minimum discharge in cubic feet per second
Water year Date
1971 17 -
1972 -
1973 -
1974 -
1975 -
1976 -
1977 -
1978 -
1979 -
1980 -
1981 -
1982 -
Aug.
Dec.
Feb.
Apr.
Nov.
Feb.
Mar.
Dec.
Jan.
Nov.
Oct.
Mar.
29
21
15
11
, 1971
, 1971
, 20, 21, 1973 , 1974
20-22, 1974
12
11
13
23
14
18
5,
, 13, 1976
f 1977
, 1977
, 1979 --
, 1979 -
, 1980
6, 1982
Di scharge
4.3
3.6 1.7
3.0
4.0
3.41 L1 . T
3.0
4.8
4.3 2.1
3.7
- July to September 1971.
84
Tabl
e 22
. St
ream
flow
records
for
Okat
Ri
ver
Cont
inue
d
oo
D.
Month
ly
and
annual
dis
charg
es,
in
cubic
fe
et
pe
r se
con
d
1971
T
ota
l
Mea
n M
ax.
Min
.
1972
T
ota
l
Mea
nM
ax.
Min
.
1973
Tota
l
Mea
nM
ax.
Min
.
1974
Tota
l
Mea
nM
ax.
Min
.
1975
Tota
l
Mea
nM
ax.
Min
.
1976
Tota
l
Mea
nM
ax.
Min
.
1977
Tota
l
Mea
nM
ax.
Min
.
Ca
len
da
r ye
ar
9,3
82
.125.6
22k 3.
1
6,2
15.1
17.0
125 1.
9
7,1
44.1
19.6
145 3.
5
7,0
35.2
19.3
123 4
.6
9,7
42.8
26
.633
0 3.7
5,2
98.1
1^.5
152 1.
7
Jan.
57
0.0
18.4
67 6.5
154.
8
4.9
97
.92
.8
42
3.3
13.7
523
.9
54
9.2
17.7
827
.0
50
6.2
16.3
98 4.4
208.
2
6.7
230 3
.4
Fe
b.
66
4.5
22.9
115 4
.5
24
2.2
8.6
563
1.9
355.
1
12.7
963
.5
58
3.2
20
.888 4
.6
57
5-7
19.9
96 3.7
117.
3
4.1
915 1.
9
Mar
.
1,2
09 39
.010
0 13
21
9.0
7.0
621 3.
3
67
9.4
21.9
121 7
.0
52
4.5
16.9
607
.2
1,38
5 44.7
205 12
52
5-7
17.0
901.
7
Ap
r.
1,0
46
.7
34
.910
3 8.7
56
2.4
18.7
973.
1
912 30
.411
8 13
459.
1
15.3
604
.7
1,11
3 37.1
156 10
733 24
.415
0 10
May
1,2
45
.6
40
.222
0 7.4
89
3.6
28
.810
6 9.6
38
3.4
12.4
35 5.8
60
0.9
19.4
77 7.5
87
3.0
28
.295 8
.2
897 28.9
133 10
June
45
4.3
15.1
644
.6
362.
8
12.1
38 5.0
60
2.0
20.1
73 9.0
68
9.4
23.0
547
.2
87
1.5
29.1
140 8
.8
329.
1
11.0
28 5.3
July
958.
5
30
.9
202 4
.3
1,29
6 41
.820
9 10
392.
4
12.7
55 5.0
709-
4
22.9
618
.4
62
6.5
20.2
123 7
.5
598 19
.389 10
44
1.6
14.2
38 6.8
Aug
.
77
0.8
24.9
16
6 4.3
703.
1
22.7
92 5.3
72
0.4
23
.212
1 5.3
560.
1
18.1
48 8.4
67
1.2
21.7
607
.8
1,0
16
.8
32
.814
9 9-8
40
6.9
13.1
576
.2
Se
pt.
1,13
8 37
.9
114 10
1,2
28
.3
40
.922
4 6.3
883.
7
29.5
125 9.
1
53
2.6
17.8
579
.0
36
6.0
12.2
734
.9
927.
1
30.9
330 7
.4
60
1.8
20
.115
2 6.8
Oct
.
723.1
23.3
95
8.3
312.
110
.140
3.6
613-
919
.810
4 8.0
553.
117
.868 6
.2
52
8.4
17.0
71 5.5
51
8.5
16.7
79 5.6
33
0.9
10.7
44 5.6
Nov
.
1,0
56
.7
35
.2
197 8
.7
171.
65.7
221
3.1
49
2.4
16.4
644.
1
24
2.4
8.0
824 4
.2
33
8.4
11.3
40 5.0
60
9.0
20
.370 7
.5
378.
712
.653
4.6
Dec
.
52
9-0
17
.1
124 4
.3
48
0.9
15.5
684
.3
677.
521
.911
5 3-7
1,1
91.3 3.84
145 5
.4
1,0
98
.43
5.4
83 5.5
749 24
.260 10
32
7.9
10.6
120 3-
3
Wate
r ye
ar
10,7
26.3
29.3
224 4
.3
5,3
95
.9
14.8
125 1.
9
6,9
41
.1
19-0
121 3.
5
7,0
56.8
19.3
145 4
.2
9,8
31
.5
26
.933
0 3.7
6,1
37
.1
16.8
152 1.
7
Table
22.
Streamflow records
for
Okat River--Continued
Co
1978
Total
Mean
Max.
Min.
1979
Tota
l
Mean
Max.
Min.
1980
Tota
l
Mean
Max.
Min.
1981
Tota
l
Mean
Max.
Min.
1982
Total
Mean
Max.
Min.
Calendar
year
6,880.9
18.9
17*» 3.7
9,943.3
27.2
265 4.
6
7,996.2
21.8
190 2.
3
9,212.4
25.2
308 3.
7
__
Jan.
650.6
21.0
57 4.3
313.
4
10.1
39 5-1
444.7
14.3
68 5.1
462.
7
14.9
54 5.7
1,26
2 40.7
202 11
D,
Feb.
343-
1
12.3
59 6.0
688.8
24.6
125 5.
3
540.
3
18.6
76 8.2
338.
1
12.1
36 5.4
570.
2
20.4
1*»4 5.
7
, Monthly
Mar.
353.1
11.4
47 3-9
1,95
8 63.2
265 13
580.
4
18.7
70 4.8
246.
9
7-96
56 3.7
1,04
6.4
33.8
213 4.
6
and
annual discharges,
in
Apr.
460.
3
15.3
55 3.7
1,258 41.9
129 13
775.
2
25.8
158 4.
8
1,09
6.7
36.6
308 5.
1
658.
2
21.9
69 5.4
May
713.4
23.0
83 8.0
911.
7
29.4
132 9-
7
1,164.4
37.6
190 8.
2
970.
2
31.3
126 4.
0
802 25.9
57 12
June
467.
8
15.6
43 8.8
854.0
28.5
176 6.
i»
1,319 t»4.0
190 14
752.
3
25.1
84 7.4
685.
3
22.8
66 9.3
cubic
feet per
second Continued
July
576.
6
18.6
85 8.4
674.
8
21.8
118 7.
1
629.
2
20.3
73 9.6
959.
7
31.0
147 7.
8
1,29
0 41.6
96 19
Aug.
366.
1
11.8
48 5.7
836.
7
27.0
81 9.7
487.
7
15-7
58 7.4
822.
9
26.5
192 8.
9
1,217.1
39.3
164 7.
4
Sept.
712.8
23.8
100 7.
2
511.2
17.0
72 5.7
409.
0
13.6
61 6.0
1,14
5 38.2
54 25 623.2
20.8
67 6.8
Oct.
507.
316.4
127 5.
7
908.6
29.3
122 8.
6
222.
07.16
29 2.3
408.
213.2
45 5.7
__
Nov.
601.
820
.187 7.
6
500.
216
.776 4.
6
633.
821
.111
4 5.4
1,251.3
41.7
209 6.
3
Dec.
1,128 36.4
174 12
527.9
17.0
81 5.7
790.5
25.5
99 5.1
758.4
24.5
89 6.3
-_ --
Wate
r year
5,68
1.3
15.6
120 3.
3
10,243-7
28.1
265 5.
1
8,286.6
22.6
190 4.
6
8,44
0.8
23.1
308 2.
3
10,5
72.3
29.0
213 4.
6
Table 23- Streamflow records for Melo River (16899620)
Location; Lat 5°20'30" N., long 162°58'33" E., on left bank 0.5 mi upstream
from mouth and 1.3 rni west of Mount Mutunte.9
Drainage area; 0.68 mi .
Period of record; October 197 4 to September 1979, June 1980 to June 1983.
Gage; Water-stage recorder and concrete control. Altitude of gage is
20 ft (from topographic map).
Remarks; Records fair. Water-quality analyses and periodic determination
of water temperatures are published elsewhere in this report.
Average discharge; 7 years (water years 1975-79, 1981-82), 7-13 ft3/s
(5,170 acre-ft/yr). 7
Extremes for period of record; Maximum discharge, 784 ft /s Mar. 22,
1976 (gage height, 5-78 ft), from rating curve extended above 17
ft /s; minimum, 0.11 ftVs Apr. 6, 7, 1983.
A. Discharge measurements, in cubic feet per second, made outside the periods of continuous discharge record
Date Discharge
Sept. 2k, 1974 11
May 15, 1980 8.6
Oct. 7, 1980 1.6
Oct. 29, 1980 .93
Dec. 3, 1980 1.4
Jan. 5, 1981 2.2
Jan. 20, 1981 3.1
87
Table 23. Streamflow records for Melo River Continued
B. Annual maximum discharge (*) and peak discharges
above base (400 ft^/s)
(Discharge in cubic feet per second, gage height in feet)
Date
July 21, 1975
Jan. 1, 1976 - Feb. 22, 1976 Mar. 22, 1976 Apr. 21, 1976 June 13, 1976 June 18, 1976 -Aug. 2, 1976 -Sept. 8, 1976
Dor Ik 1Q76 _ -----U CL. 1 ~ , 1 j 1 U
Sept. 21, 1978
Mar. 1, 1979
June 8, 1980 June 12, 1980 July 10, 1980 Sept. 5, 1980
Apr. 27, 1981 June 6, 1981 June 28, 1981 July 3, 1981 Aug. 30, 1981
Nov. 10, 1981 Nov. 15, 1981 Mar. 13, 1982 M_... oO i r»Q iMar. 2o, 19o2 - -- Aug. 25, 1982
Time
1900
1/ 0200
0100 1130 1330
I/ 1 * 30I/ 2 77Q1 /* > >"i / i£nn
0830
1500
0330
1330
0230 2030 1200 1800
1/ 1000
1200 1900 0230 0600
1700 1600 2330 0200 0300
Di scharge
*236
592 586
*784 550
1/ 55 ° '/ r nn
450 482
*301
*323
*378
476
3/678449
1 / jfcTcn"/pU
443 530 473 626
572 *706 560 482 430
Gage height
3.57
2/ 5 14j i ^ 5.12 5-78
1X5.00 l/ c n
J V
2V60
4.73
3.58
3.69
3.94
4.32 4.364.97 4.28
4.15 4.44 ,4.30
^/ I, 0 i
4.64 5.04 4.60 4.34 4.16
- About.2/ From floodmark in well.
Maximum for June to September 1980.
Table 23 Streamflow records at Melo River Continued
C. Annual minimum discharge in cubic feet per second
Water year
1975
1976
1Q77 ______iy// 1978 --1979
1980-7
1981
1982
1983
Date
Nov.
Feb.
Mar1 l«J 1 .
Jan.
Jan.
Sept
Mar.
Mar.
Apr.
^ « , I ;?/ t
12, 1976
10, 1977
2 1 O"7O, 197o
91 iq7q ___________f- j i ij/j
. 30, 1980
iq ?o iqfti -_- I 3 , t-\i , I ;?u i
6, 7, 1983
Di scharge
1.5
1.6
______ .65
*8°
.91
1.0
.11
- About.2/ June to September 1980.
89
Tabl
e 23.
Stre
amfl
ow records
for
Melo
Riv
er C
onti
nued
D.
Mont
hly
and
annu
al discharges,
in cu
bic
feet
per
second
1974
Total
Mean
Max.
Min.
1975
Total
Mean
Max.
Min.
1976
Total
Mean
Max.
Min.
1977
Total
Mean
Max.
Min.
1978
Tota
l
Mean
Max.
Min.
Cal en
dar
year
-- -
2,889.5
7.92
32 1.9
3,18
8.20
8.71
79 1.8
1,752.35
4.80
50.70
1,992.7
5.^6
531.1
Jan.
215.
7
6.96
25 3.2
192.4
6.21
30 2.7
75.3 2.43
10 1.6
189.0
6.10
16 1.1
Feb.
223.6
7.99
321-9
221.9
7.65
391.
8
52.0 1.86
5.0
1.2
104.0
3-71
14 1.6
Mar.
242.
2
7.81
26 3-2
441.
0
14.2
59 4.9
179.
55
5.79
30.7
0
113.6
3.66
16 1.2
Apr.
226. 5
7.55
25 2.5
335.9
11.2
41 4.0
270.0
9.00
50 4.0
165.
6
5.52
211.2
May
255.
4
8.24
30 3.6
297.7
9.60
27 3.3
266.6
8.60
37 3.5
199.9
6.45
18 3.0
June
277.3
9.24
19 3.6
322.9
10.8
50 3.5
127.
7
4.26
8.1
2.4
154.2
5.14
10 2.8
July
274.0
8.84
30 4.2
227.5
7.34
30 3.5
163.
6
5.28
12 2.6
149.6
4.83
201.9
Aug.
258.
7
8.35
22 2.7
306.
8
9.90
50 3.2
140.6
4.54
15 2.6
95.1 3-07
10 1.3
Sept
.
144.7
4.82
27 2.2
223.
6
7.45
79 2.0
166.
1
5.54
411.
9
160.6
5.35
201.5
Oct.
181.4
5.85
18 2.5
210.
46.79
20 2.2
162.9
5.25
15 1.8
95.5 3.08
12 1.5
108.
83.51
21 1.1
Nov.
102.8
3.43
10 1.7
158.
15.
2718 2.
5
207.8
6.93
22 2.4
117.7
3.92
21 1.5
188.6
6.29
31 1.2
Dec.
394.6
12.7
40 2.5
402.
913
.030 3.
5
247.8
7.99
20 3.3
97.7 3.15
27 1.2
363-7
11.7
53 3.8
Water
year -- --
2,79
6.9
7.66
401.7
3,344.1
9.13
79 1.8
2,05
9.95
5.64
50.7
0
1,64
2.50
4.50
27 1.1
Table
23.
Str
ea
mflo
w
record
s
for
Melo
R
iver-
-Continued
vxi
D.
Mont
hly
and
annu
al
1979
Tota
l
Mean
Max.
Mi
n.
1980
Total
Mean
Ma
x.
Min.
1981
Tota
l
Mean
Max.
Min.
1982
Tota
l
Mean
Max.
Min.
1983
Tota
l
Mean
Max.
Min.
Calendar
year
2,75
9.34
7.56
90.69
2,46
9.00
6.76
59.70
Jan.
94.0 3.03
13 1.0
134.8
4.35
14 1.7
370.5
12.0
53 3.3
20.8
0
.67
2.0 .50
Feb.
191.
9
6.85
30 1.5
120.9
4.32
15 1.7
183.
4
6.55
56 1.3
12.4
5
.44
1.0 .30
Mar.
491.
8
15.9
62 3.3
75.4
4
2.43
19.6
9
413.6
13.3
59 1.2
9.97 .32
.70
.20
Apr.
438.
1
14.6
40 4.9
399.
4
13.3
901.
6
184.
1
6.14
17 1.7
16.2
2
.54
5.5 .15
May
270.
2
8.72
30 3.1
346.
1
11.2
431.5
178.9
5.77
15 2.2
125.
76
4.06
26.2
4
disc
harg
es,
in cubic
feet
pe
r se
cond
Continued
June
280.
6
9.35
34 2.6
367.6
12.2
50 4.3
352.
9
11.8
48 4.3
167.
8
5-59
20 2.4
157.
9
5.26
16 1.9
July
174.
0
5.61
28 2.1
185.2
5.97
20 2.4
268.
1
8.65
401.8
307.
3
9.91
30 3.8
Aug.
233.
9
7.55
25 3.0
128.
3
4.14
11 2.1
201.5
6.50
43 2.2
293.
8
9.48
34 2.1
Sept.
135.
0
4.50
20 1.5
132.8
4.43
32 1.1
159.
0
5.30
20 1.7
169.2
5.64
20 1.7
Oct.
46.57
1.50
4.2 .80
127-8
4.12
11 1.5
79.15
2.55
18.90
Nov.
152.
9 5.10
25 1.5
356.
311
.984 2.
2
69.0
02.30
14.8
0
Dec.
200.
3 6.46
20 1.3
217.1
7.00
26 2.2
52.2
51.69
10.70
Water
year
2,97
0.6
8.14
62 1.0
2,45
7.91
6.73
90.69
2,969.80
8.14
841.
2
Table 24. Streamflow records for Palusrik River (16899700)
[Figures 23,
Location; Lat 5°l6 l 33" N., long 162059'13" E., on right bank 0.4 mi upstream
from Finkol River, 0.9 mi northeast of Utwa village, and 2.4 mi south
of Mount Finkol .2 Drainage area: 0.45 mi .
Period of record: June 1971 to September 1972 (discontinued).
Gage; Water-stage recorder. Altitude of gage is 100 ft (from topographic
map) .
Remarks; Records fair.
Extremes for period of record; Maximum discharge, 1,250 ft /s Sept. 11,
1972 (gage height, 7-70 ft), from rating curve extended above 12 ft /s;
minimum, 1.9 ftVs Feb. 7, 8, 1972.
A. Discharge measurements, in cubic feet per second, made outside the period of continuous discharge record
Date Discharge Date Discharge
MayOct.Oct.Oct.Nov.Nov.Dec.Dec.Jan.Jan.Feb.Feb.Mar.Mar.Apr.Apr.
17,3,16,30,1* >28,5,26,4,25,12,28,19,29,13,18,
1971 1972
, 1972 , 1972 , 1972 -, 1972 1972
, 1972 1973
, 1973 , 1973 , 1973 , 1973 , 1973 , 1973 , 1973
10 6 2 Ji 2 2 3 8 2 1
1 2 1 1 2
.8
.4
.7
.3
.8
.7
.4
.6
.7
.64
.3
.8
.1
.1
.3
MayJuneJulyJulyAug.Aug.SeptOct.Oct.Nov.Dec.Jan.MayApr.Oct.
3, 111,2,18,9,29,
. 1810,29,20,6,9,16,4,15,
973 1973
1973 1973
1973 1973
, 1973 1973 1973 1973
1973 1974 1980 1981 1982
14 3 3 3 3 3 3 11 3 4 2 5 16 Ji 5
.1
.5
.4
.3
.5
.1
.5
.7
.2
.6
.2
.8
Note: Discharge measurements were made below diversion dam.
92
Figure 23 Palusrik River at gaging station (1971) (view upstream).
Figure 24. Palusrik River dam at gaging station (1973)
93
Table 24. Streamflow records for Palusrik River Continued
B. Annual maximum discharge (*) and peak discharges
above base (550 ft^/s)
(Discharge in cubic feet per second, gage height in feet)
Date
July 2, 1971 -July 6, 1971 -Aug. 6, 1971 -Sept. 19, 1971 -
May 6, 1972 -May 22, 1972 -Maw ^1 1Q72 -i ioy j i , i j / f-
Sept. 11, 1972 -Sept. 29, 1972 -
Time
1330 1330 1030 2000
0500 0500 0530 1230 0300
Di scharge
592 692
* 776 664
960 640 559
*1,250 1,140
Gage height
6.03 6.28 6.49 6.21
6.95 6.65 6.93 7.70 7.38
C. Annual minimum discharge in cubic feet per second
Water year Date Discharge
1971-7
1972
Aug. 29, Sept. 7, 1971
Feb. 7, 8, 1972
3.4
1.9
June to September 1971.
94
Table
2*4.
Streamflow re
cord
s for
Palusrik Ri
ver
Cont
inue
d
V£>
Calendar
year
Jan.
Fe
b.
Mar.
1971
Total
Me
anMa
x.Mi
n.
1972
Total
127.
2 130.6
338.9
Mean
4.10
4.
50
10.9
Max.
11
22
47Mi
n.
~
2.3
2.0
3-9
D.
Mont
hly
and
Apr.
May
362.
1 491.2
12.1
15.8
30
964.
7 4.
5
annu
al June
304.5
10.2
27 5.1
142.6di
scharges,
July
355.2
11.5
57 4.9
405.1
4.75
13.1
17 3.2
74 3.9
in cubic
Aug.
298.1
9.62
74 3.7
285.
1
9.20
43 2.2
feet
pe
r
Sept
.
438.4
14.6
76 3.8
796.8
26.6
228 4.
8
second Oct.
Nov.
203.1
406.
06.
55
13.5
21
783.
5 4.
9
Water
Dec.
year
171.
45.53
41 2.3
3,860.1
10.5
228 2.
0
Table 25- Streamflow records for Malem River (16899750)
[Figure 25]
Location; Lat 5°17 I 35" N., long 163°00'5V' E., on left bank 0.9 mi upstream
from mouth and 2.0 mi southeast of Mount Finkol.2 Drainage area: 0.76 mi .
Period of record: July 1971 to March 1981, March to September 1982.
Gage; Water-stage recorder and concrete control. Altitude of gage is 95 ft
from stadia survey.
Remarks; Records fair. Since 1975, water has been diverted through a 6-in pipe
from dam above station for domestic use in village of Malem. Water-quality
analyses and periodic determinations of water temperature are published
elsewhere in this report.
Average discharge; 9 years (1972-80), 7.17 ft3/s (5,190 acre-ft/yr).
Extremes for period of record; Maximum discharge, 1,550 ft /s Mar. 22, 1976
(gage height, 6.20 ft), from rating curve extended above 110 ft /s;
minimum, 0.14 ft /s Nov. 20, 197^, during flushing at dam upstream.
A. Discharge measurements, in cubic feet per second, made outside the periods of continuous discharge record
Date
June 16, 1971 -Apr. 29, 1981 -May 12, 1981 -May 26, 1981 -June 23, 1981 -Aug. 12, 1981 -Sept. 1, 1981 -Sept. 23, 1981 -Oct. 28, 1981 -Jan. 13, 1983 -Jan. 26, 1983 -Feb. 8, 1983 -Mar. 3, 1983 -Mar. 16, 1983 Mar. 28, 1983 -Apr. 11, 1983 -May k, 1983 -May 2k, 1983 -June 20, 1983 -July 20, 1983 -
Discharge
. 6.01 9
3.3 17 2.4 , 3.3____________________ 5.4
. 3.0 .75-_-________-_-_-__ .34 .18 . .27 .06 .07
. .48 .08 .35... .50 4.2
. . 4.6
96
Figure 25. Malem River at gaging station (view upstream) (Station destroyed by flood April 27, 1981).
97
Table 25- Streamflow records for Ma I em River Continued
B. Annual maximum discharge (*) and peak discharges
above base (350 ftVs)
(Discharge in cubic feet per second, gage height in feet)
Date
July 6, 1971 Aug. 6, 1971 Aug. 12, 1971 Aug. 20, 1971 Sept. 19, 1971
Nov. 4, 1971 Nov. 5, 1971 Maw ?8 1Q7? - ioy £,\J j \ j § £»Mav 11 1Q7? ---.i ia y j \ , i ji £.
Sept. 11, 1972
Dec. 3, 1972 -Aug. 19, 1973 -
Oct. 10, 1973 Ann Q 1Q74 ------nuy . j , i ji *t
Dec 7 1974 - L/C*- . / , i ji n
July 16, 1975 -
Oct. 1, 1975 -Oct. 10, 1975 Dec. 21, 1975 -Jan. 1, 1976 -Mar. 11, 1976 -Mar. 22, 1976 -Mar. 24, 1976 -Apr. 21, 1976 -May 13, 1976 -June 19, 1976 -Sept. 8, 1976 -
Oct. 25, 1976 -
Dec. 16, 1977 -
May 1, 1979 - June 8, 1979 -Jiilv 9k 1Q7Q -«ju i y ^.t , ij/j Ann 90 1Q7Q ---
Time
1300 0930 0130 0530 2100
0800 1530 2300 0500 1730
0330 0800
0230 1300
1300 1600
1200 1300 0200 0330 1645 1145 0700 1300 2100 1800 1000
1600
0800
1230 0830 1100.-_ i9nn
Discharge
* 980 420 368 750 687
415 380 708 548
* 964
* 425 380
* 542 364
* 820 392
405 360 380 352
1,300 *1,550
360 980 500 465 638
* 360
* 304
415 384 614
* AA7
Gage height
5.60 4.74 4.62 5.30 5.21
4.73 4.65 5.24 4.98 5.58
^.75 4.65
^.97 4.61
5.40 4.68
4.71 4.60 4.65 4.58 5.95 6.20 4.60 5.60 4.90 4.83 5.13
4.60
4.96
I/' 73I/I. ££ H .DO
5.09a 17
98
Table 25. Streamflow records for Malem River Continued
B. Annual maximum discharge (*) and peak discharges
above base (350 ft^/s) Continued
(Discharge in cubic feet per second, gage height in feet)
Date
May 10, 1980 June 12, 1980 July 13, 1980
Nov. 3, 1980
Mar. 13, 1982 May 8, 1982 July 3, 1982 Aug. 18, 1982
Time
1500 2030 1700
1930
2300 1000 1930 0100
Discharge
368 *396 356
2/ 352jj*-
3/470415 392 372
Gage height
4.62 4.69 4.59
4.58
4.844.73 4.684.63
From floodmark in well.
- Maximum for October 1980 to March 1981.
Maximum for March to September 1982.
99
Table 25. Streamflow records for Malem River--Continued
C. Annual minimum discharge in cubic feet per second
Water year
1971
19721973 -
1974 ----
1975 -
1976 ----
1977
1978 ----
1979 -
1980 iofi 1 1'l^ol
1982^ --
Aug.
Feb.
Feb.
Feb.
Nov.
Feb.
Mar.
Dec.
Oct.
Feb.
Mar.
Mar.
Date
29,
19,
21,
20,
21,
12,
11,
10,
18-2
18,
21,
5, 6
Without regulat ion
During short regulat ion
of flow at damDischarge
1971
19721973 1974
1Q72i ______iy/*+ - ----
19761977 -----
1977 -----
0, 1978 1980
1981
, 10, 1982
3.2
1.6
.64
1.3
.89
.89
.26
.33
.88
1.0
.35
.84
Apr.
Feb.
Nov.
Aug.
Somet Mar.
Jan.
Nov.
Feb.
Date Discharge
7,
23,
20,
27,
ime 1-
4,
3,
20,
1973 - C
1974
1974 -----
1976 -----
during period 10, 1977 1978 -
19781980
1.26
.32
.14
.37
.15
.21
.19
.31
- October 1980 to March 1981. 2/- March to September 1982.
D. Discharge measurements, in cubic feet per second, made above diversion dam
[Lat 5°17'36" N., long l63°00'51" E., about 250 ft upstream, from gaging station at altitude 120 ft (from topographic map)]
Date Discharge
Mar. 15, 1982
Apr. 13, 1982
Mar. 3, 1983
May 24, 1983
10
1.8
.64
1.4
100
Table
25.
Streamflow records
for
Male
m Ri
ver-
-Con
tinu
ed
E.
Mont
hly
and
annu
al discharges,
in cubic
feet
pe
r second
1971
Tota
l
Mean
Max.
Min.
1972
Tota
l
Mean
Max.
Min.
1973
Total
Mean
Max.
Min.
Total
Mean
Max.
Min.
1975
Total
Mean
Max.
Min.
1976
Tota
l
Mean
Max.
Min.
1977
Total
Mean
Max.
Min.
Calendar
year
-- --
3,H7.l 8.52
901.7
2,255.0
6.18
841.1
2,70
9.0
7.42
681.2
2,927.3
8.02
631.6
3,49
3.20
9.54
165 1.
1
1,760.79
4.82
80.35
Jan.
168.
0
5.42
26 '2.
5
73.9 2.38
6.5
1.7
187.
2
6.04
35 1.8
247.8
7.99
49 2.3
177.6
5.73
47 1.5
63.0 2.03
10 1.0
Feb.
160.0
5.52
261.7
76.5 2.73
15 1.1
105.5
3.77
26 1.6
283.
7
10.1
451.
6
195.1
6.73
441.
1
39.7
5
1.42
5.0 .62
Mar.
338.
8
10.9
38 3.3
75.7 2.44
9.8
1.4
206.7
6.67
39 2.0
235.
5
7.60
35 2.6
763.1
24.6
154 3.
6
252.15
8.13
46.3
5
Apr.
379.
1
12.6
32 4.5
226.
2
7.54
36 1.2
324.
4
10.8
47 4.0
210.1
7.00
37 1.8
431.
1
14.4
82 3.7
316.7
10.6
80 4.1
May
414.
7
13.4
75 4.1
360.
7
11.6
61 3.0
130.
8
4.22
10 2.1
229.3
7.40
31 3.2
358.0
11-5
61 2.8
335.1
10.8
54 3.7
June
164.6
5.49
20 2.6
117.
6
3.92
19 1.8
212.
7
7.09
36 2.9
322.
4
10.7
25 2.7
330.
1
11.0
42 3.3
89.0 2.97
7.9
1.4
July
444.
3
14.3
77 5.4
433.
6
14.0
60 4.7
142.
3
4.59
17 1.8
258.4
8.34
23 2.7
260.
1
8.39
63 2.6
204.
6
6.60
23 2.4
125.
5
4.05
19 1.2
Aug.
283.3
9.14
49 3.3
262.4
8.46
37 2.9
249.5
8.05
48 1.8
298.0
9.61
31 3-2
256.
0
8.26
34 3.0
151.0
4.87
18 2.0
105.
2
3-39
10 1.5
Sept.
398.
4
13.3
60 3.7
377.
2
12.6
90 3.2
300.
6
10.0
39 3.3
158.
4
5.28
17 2.1
143.
7
4.79
36 1.9
323.
8
10.8
165 1.
9
180.
7
6.02
591.4
Oct.
206.
66.
6628 3.
3
132.3
4.27
14 2.2
249.
38.
0484 3.
0
190.
76.
1530 1.
9
227.4
7.34
42 2.3
156.
45.05
30 1.4
69.6 2.25
15 1.1
Nov.
287.
69.
5955 4.
0
79.4 2.65
7-9
1.7
151.5
5.05
25 1.9
93.1 3.10
17 1.2
98.6 3-29
9.6
1.8
186.6
6.22
25 1.7
98.5 3.28
15 1.1
Dec.
205.
56.
6351 1.
9
207.0
6.68
32 2.1
231.
27.
4630 1.
7
543.1
17.5
68 2.1
412.
713
.345 1.
7
215.
86.96
25 2.6
85-5
92.76
39.41
Water
year --
3,398.1
9.28
90 1.7
2,04
1.7
5.59
611.
1
2,514.1
6.89
841.
6
3,015.5
8.26
681.2
3,673.1
10.0
165 1.
1
2,06
5.90
5.66
80.3
5
Table
25.
Streamflow records
for
Malem River Continued
E.
Monthly
and
1978
Tota
l
Mean
Max.
Min.
1979
Total
Mean
Max.
Min.
1980
Total
Mean
Max.
Min.
1981
Total
Mean
Max.
Min.
1982
Total
Mean
Max.
Min.
Calendar
year
1,98
6.77
5.44
54.88
2,722.5
7.46
691.1
2,37
3.36
6.48
77.8
4
__ __
Jan.
273.38
8.82
29.88
97.3 3.14
18 1.1
128.9
4.16
221.6
145.
4
4.69
24 2.0
__
Feb.
127.0
4.54
541.5
177.
9
6.35
31 1.2
110.8
3.82
14 1.4
71.7 2.56
10 1.2 __
Mar.
135.
5
4.37
221.
1
427.5
13.8
60 4.0
230.
7
7.44
31 2.3
90.59
2.92
32.6
0
357.0
11.5
50 1.2
Apr.
174.24
5.81
31.94
309.6
10.3
35 3.8
227.
9
7.60
34 2.0
__ --
180.5
6.02
18 1.7
annu
al discharges
May
180.
8
5-83
30 1.4
318.
3
10.3
69 3-1
455.4
14.7
77 4.3
__
177.
1
5.71
21 2.1
June
146.1
4.87
22 1.9
289.
1
9.64
60 3.0
378.
1
12.6
38 3.9
__
187.
3
6.24
22 2.1
, in cubic
feet
per
second Con
tinu
ed
July
149.6
4.83
30 1.6
168.6
5.44
39 1.6
163.7
5.28
21 2.4
~ __
345.1
11.1
51 2.9
Aug.
120.3
3.88
15 1.3
279.
9
9.03
38 2.6
128.
2
4.14
14 1.6
__
266.
2
8.59
39 1.4
Sept
. Oct.
115-
366
.65
3.84
2.15
15
9.8
1.2
.95
94.2
208.
73.
14
6.73
10
381.
3 2.0
99.0
64.86
3.30
2.09
14
8.1
1.3
-84
-_
219.
8
7-33
21 2.3
Nov.
165.
35.
5126 1.
2
168.4
5.61
30 1.3
148.
84.
96271.
5
~ __
Dec.
332.
610.7
48 2.7
183.
05.90
39 1.9
237.0
7.65
30 1.4
Water
year
1,67
5.91
4.59
54.4
1
2,72
6.95
7.47
69.9
5
2,48
2.8
6.78
77 1.3
__ __ --
Table 26. Streamflow records for Tofol River (16899800)
[Figure 26]
Location: Lat 5O19'10" N., long 163 O00'2V E., on left bank 25 ft downstream
from right-bank tributary, 0.9 mi upstream from mouth, and 1.3 mi
northeast of Mount Finkol.2 Drainage area: 0.53 mi .
Period of record: June 1971 to September 1979, March 1980 to June 1983.
Gage; Water-stage recorder and concrete control. Altitude of gage is
98 ft from stadia survey.
Remarks; Records fair. Since 1975, water has been diverted through 8-in
pipe from dam above station for domestic use. Water-quality analyses
and periodic determinations of water temperatures are published elsewhere
in this report.
Average discharge; 10 years (1971-79, 1981-82), 6.05 ft3/s (4,380 acre-ft/yr),
Extremes for period; Maximum discharge, 1,560 ft /s, Nov. 10, 1981 (gage
height, 5-97 ft), from rating curve extended above 79 ft /s; minimum,
0.01 ft3 /s Apr. 1, 1983.
A. Discharge measurements, in cubic feet per second, made outside the periods of continuous discharge record
Date Discharge
May 16, 1971 10
Oct. 2, 1979 1.9
Feb. 28, 1980 2.2
103
Figure 26. Tofol River at gaging station (view upstream)
IDA
Table 26. Streamflow records for Tofol River Continued
B. Annual maximum discharge (*) and peak discharges
above base (450 ft^/s)
(Discharge in cubic feet per second, gage height in feet)
Date
June 9, 1971 -July 6, 1971 - Aug. 20, 1971 Sept. 19, 1971
Oct. 10, 1971 May 28, 1972 -Sept. 11, 1972
Sept. 15, 1973
Apr. 11, 1974 July 11, 1974
Dpr 7 1974 -i/eu . / , 1 «7/*T
Dec. 30, 1975 Mar. 11, 1976 Mar. 22, 1976 Mar. 26, 1976 Apr. 21, 1976May 13, 1976 -Aug. 2, 1976 - Sept. 8, 1976
Oct. 28, 1976
Dec. 16, 1977
Mar. 1, 1979 -May 1, 1979 July 24, 1979 Aug. 20, 1979
May 9, 1980 June 8, 1980 -June 12, 1980
Nov. 3, 1980 -Nov. 22, 1980 Apr. 27, 1981.lulv 1 1Qftl -
Time
2300 1400 - 0730 2200
1930 2200 1800
1700
- 1330 1200
1300
- 1945 1745 1200 0230_______ ,345 2115 1715 1015
- 1115
0100
1200 1300 1130 1130
1/0130 0200 2100
- - 1930 0900 0900----___ ncnn
Di scharge
548 *1,050
484 810
650 720
*745
*398
536 *660
*488
590755
*1,270 532 710 500 770 576
*1,030
*390
564 572 670
*715
1 2/Qnn ODD
770 548
710 645
*1,260 73C
Gage height
4.32 5.24 4.16 4.85
4.54 4.68 4.73
3.94
4.29 4.56
4.17
4.42 4.75 5.56 4.28 4.66 4.20 4.78 4.39
5.21
3.92
4.36 4.38 4.58 4.67
4.78 4.32
3/4 66 *4 . DO
4.53 5.54L -71
105
Table 26. Streamflow records for Tofol River Continued
B. Annual maximum discharge (*) and peak discharges
above base (450 ft /s) Continued
(Discharge in cubic feet per second, gage height in feet)
Date
Nov. 10,Nov. 15,
Mar 7ft,I IGI I Z.U *
Aug. 18,
- About.
1981 1981 1982 1982 1 f\Q 11 yo L
Time
1600 1530 2330 0100 0100
Discharge
*1,5601,170 472556564
Gage height
5.97 5.414 11^ . i j 4 344.36
2/ Maximum for March to September 1980.
From floodmark in well.
106
Table 26. Streamflow records for Tofol River Continued
Water year
1971 -
1972
1973 1974 1975
1976 ----
1Q77 ____I.?// ---- -
1978 1979 ----
1980 2/
1981
1982
1983 ----
C. Annual minimum discharge in
Without regulat ion
Date
Aug.
Dec.
Feb.
Feb.
Nov.
Feb.
Dec.
Feb.
Sept,
Oct.
Mar.
Apr.
29,
21,
21,
3,
20,
10,
11,
9,
5,
. 19
16,
5,1,
30, 1971
19711973 -----
6, 7, 20, 1974
21, 1974
1976 -
1977 - -
10, 13, 1977 -
Sept. 23,
, 1980 -----
1980
1982 1983 - -
cubic feet per second
During short regulation
of flow at dam
Discharge Date Discharge
2.1
1.2
.82
1.5
1.3
1.1
1.0
1.2
1.1
.58
1.1
.01
Nov. 27, 1974, Sept. 30, 1975 0.86
Feb. 11, 1976 .78
Aug. 21, 22, 1977 ~ .70
Dec. 12, 1977 .70
About.I/
2/- March to September 1980.
107
Table 26. Streamflow records for Tofol River Continued
D. Discharge measurements, in cubic feet per second, made at diversion dam
[Lat 5°19'OV' N., long 163°00'19" E., about 900 ft upstreamfrom gaging station]
_______Discharge___
Date100 ft
upstream60 ft
downstream
Apr. 6, 1981
Jan. 21, 1982
Mar. 16, 1982
Apr. 13, 1982
May 20, 1982
Mar. 3, 1983
Mar. 29, 1983
Apr. 26, 1983
May 24, 1983
June 21, 1983
July 21, 1983
6.1
7.3
6.4
1.9
3.0
.29
.15
.28
.94
3.0
2.2
5.1
4.9
.05
1.8
108
Tabl
e 26.
Streamflow records
for
Tofo
l River Continued
E.
Monthly
and
annual di
scha
rges
, in cu
bic
feet pe
r se
cond
1971
Total
Mean
Max.
Min.
1972
Total
Mean
Max.
Min.
1973
Total
Mean
Max.
Min.
1974
Tota
l
Mean
Max.
Min.
1975
Tota
l
Mean
Max.
Min.
1976
Tota
l
Mean
Max.
Min.
1977
Tota
l
Mean
Max.
Min.
Calendar
year
2,38
4.8
6.52
581.
2
1,83
0.24
5.01
45.82
2,18
2.1
5.98
451.
4
2,22
9.6
6.11
38 1.7
2,85
9.40
7.81
122 1.
2
1,61
4.15
4.42
49.7
5
Jan.
142.
2
4.59
20 2.2
59.3 1.91
3.3
1.2
147.2
4.75
16 1.8
188.
3
6.07
29 2.5
149.5
4.82
31 1.4
70.3 2.27
10 1.2
Feb.
140.
7
4.85
211.5
62.1
4
2.22
13.8
2
90.3 3.23
23 1.6
189.
1
6.75
25 1.7
137.
6
4.74
28 1.2
42.70
1.53
5.0 .80
Mar.
273.
1
8.81
25 3.8
69.6
'
2.25
7.2
1.3
172.
2
5.55
28 2.1
177.4
5.72
21 2.8
508.4
16.4
74 3.1
242.
55
7.82
40.75
Apr.
283.9
9.46
23 3.9
170.
1
5.67
241.
3
265.
0
8.83
39 3-8
149.
0
4.97
23 1.9
339.
3
11-3
68 3.2
303.
3
10.1
49 4.3
May
299-
9
9.67
50 3.2
275.8
8.90
34 3.1
110.
0
3.55
7.1
2.0
194.0
6.26
21 3.2
313-6
10.1
44 2.4
257.
5
8.31
41 3.4
June
226.
2
7.54
21 3.4
122.6
4.09
15 1-9
101.2
3-37
9.3
1.9
164.5
5.48
20 2.7
247.9
8.26
18 2.7
240.
0
8.00
28 2.6
88.9 2.96
10 1.6
July
280.
0
9.03
55 3.6
325-
3
10.5
46 3.4
101.5
3.27
9-9
1.8
226.4
7-30
25 2.8
205.
4
6.63
38 2.8
162.3
5.24
21 2.5
97.2 3-14
10 1.7
Aug.
149.
1
4.81
25 2.2
200.
8
6.48
25 1.9
188.
5
6.08
37 1.8
218.
1
7.04
22 3.0
184.5
5.95
17 1.9
171.
1
5-52
37 2.0
79.1 2.55
8.4
1.1
Sept.
262.
8
8.76
29 2.6
281.4
9.38
58 2.8
263.
0
8.77
31 3.8
132.5
4.42
17 2.1
127.5
4.25
24 2.1
262.7
8.76
122 1.
9
143.8
4-79
40 1.8
Oct.
199-9
6.45
37 2.5
100.3
3.24
9.7
1.5
202.
06.52
45 2.8
158.8
5.12
21 2.2
161.
95.22
241.9
174.
15.
62471.
9
95-9 3.09
14 1.8
Nov.
223.
37.
4433 2.
8
62.3 2.08
5.0
1.2
137.4
4.58
15 2.0
84.5 2.82
9.4
1.4
85.0 2.83
7.1
1.7
179.4
5.98
21 2.1
106.
93.
5614 1.
5
Dec.
130.8
4.22
241.
3
152.3
4.91
231.
6
199-
76.44
201.
8
412.6
13.3
452.
5
319.6
10.3
25 1.9
221.4
7.14
23 2.9
86.0 2.77
301.0
Water
year
-- -- --
2,623.9
7-17
58 1.3
1,60
6.04
4.40
37.8
2
2,06
5.3
5.66
451.
6
2,31
9.0
6.35
451.
4
2,851.0
7-79
122 1.
2
1,90
0.25
5.21
49.75
Tabl
e 26.
Stre
amfl
ow re
cord
s fo
r To
fol
River Continued
E.
Mont
hly
and
1978
Total
Mean
Max.
Min.
1979
Total
Mean
Max.
Min.
1980
Total
Mean
Max.
Min.
1981
Tota
l
Mean
Max.
Min.
1982
Total
Mean
Max.
Min.
1983
Tota
l
Mean
Max.
Min.
Cale
ndar
ye
ar
1,70
8.0
4.68
381.
2
2,273.86
6.23
95.8
2
2,24
9.72
6.16
46.7
4
Jan.
217.9
7.03
201.2
89.1 2.87
121.
4
--
153.
3
4.36
16 2.6
298.
9
9.64
40 2.5
14.9
4
.48
1.8 .24
Feb.
107.9
3.85
20 1.8
161.1
5.75
221.
4
86.0 3.07
8.7
1.3
127.4
4.55
301.5
4.80 .17
.58
.09
Mar.
125.0
4.03
18 1.5
431.1
13.9
57 4.0
214.
4
6.92
30 2.5
73.0
6
2.36
21.8
2
305.9
9-87
461.2
2.25 .073
.26
.02
Apr.
122.
3
4.08
191.
3
319.
2
10.6
35 4.5
243.
3
8.11
31 2.0
300.7
10.0
95 1.3
167.5
5.58
18 2.1
3.94 .13
2.6 .02
annual di
scha
rges
May
165.
6
5.34
20 2.1
237.
5
7.65
32 2.8
425.5
13.7
80 4.3
341.1
11.0
37 3.1
161.9
5.22
15 2.3
46.78
1.51
19.0
3
June
127.3
4.24
16 1-9
233-5
7.78
38 2.5
367.9
12.3
42 3.6
246.0
8.20
24 2.9
163.
5
5.45
17 2.1
65.38
2.18
8.8 .34
, in
cu
bic
feet per
second Continued
July
125.9
4.06
18 1.9
178.4
5.75
371.
9
161.
7
5.22
20 2.3
224.
1
7.23
33 1.6
298.5
9.63
28 3.2
Aug.
85.9 2.77
10 1.2
244.5
7.89
23 2.8
105.2
3.39
9.0
1.6
153.6
4.95
261.5
271.
2
8.75
341.
6
Sept
.
115.
4
3.85
14 1.4
94.9 3.16
10 1.3
83.6 2.79
9.2
1.2
131.4
4.38
12 2.5
204.
2
6.81
222.1
Oct.
104.2
3.36
15 1.5
__ -- 73.3
22.
3711
.70
98.4 3-17
14 1.3
112.
43.
63211.3
Nov.
134.
84.
49201.
6
__
187.
86.26
35 1.9
309.
110.3
841.
8
91.3
43.
0422
.94
Dec.
275.
88.90
38 2.9
__
202.
46.53
19 1.9
175.1
5.65
211.9
46.98
1.52
8.2 .74
Water
year
1,48
2.00
4.06
301.0
2,50
3-9
4.68
381.2
--
2,154.78
5-90
95.70
2,581.6
7.07
841.
2
Low-flow partial-record stations
Table 27. Discharge measurements, in cubic feet per second,
of Mwot River (16899670)
Location; Lat 5°l8'26" N., long l62°55'25" E., 300 ft upstream from
dam, 0.55 mi upstream from mouth, 0.4 mi east of Insief, and 1.1
mi northwest of Mount Wakap. Altitude is 50 ft (from topographic
map).o
Drainage area; 0.79 mi .
Period of record; 1980-82.
Date Discharge
May 17, 1980 9.7Oct. 30, 1980 26Dec. 30, 1980 2.4Jan. 21, 1981 2.1Apr. 2, 1981 .67Oct. 20, 1982 1.3
111
Table 28. Discharge measurements, in cubic feet per second,
of Tafuyat River (16899780)
Location: Lat 5°18 I 38" N., long 163 O00'47" E., 100 ft downstream from
former Japanese dam, 0.75 mi upstream from mouth, and 1.5 mi east
of Mount Finkol. Altitude is 95 ft (estimate from stadia survey
to base of old Japanese dam).2 Drainage area: 0.27 mi .
Period of record: 1974-75, 1977-83-
Date Discharge Date Di scharge
Feb. 22, 1974 Apr. 24, 1974 Apr. 2, 1975 June 4, 1977 Mar. 1, 1978 Mar. 28, 1978 Apr. 11, 1978 June 22, 1978 July 26, 1979 Jan. 28, 1980 Feb. 8, 1980 Feb. 20, 1980 Mar. 18, 1980 Apr. 17, 1980
Discharge
0.96 _____ 3 2
J L~
__ _____ 1.2
1.0
_______ 6.3 1.1 2.4 1.2
___ _- c hj . " - - 1.6_ ._ _ _ L 2
T . f-
_____ "3 CJ » J
measurements made above dam:
May 12, 1980 -June 26, 1980 -Aug. 21, 1980 -Oct. 2, 1980 -Oct. 27, 1980 -Jan. 2, 1981 -Apr. 4, 1981 -Mar 4, 1982 -Mar. 15, 1982 -Oct. 15, 1982 -Mar. 7, 1983 Mar. 31, 1983 -Aug. 30, 1983 -
Mar. 31, 1983 0.15. Aug. 30, 1983 1.5.
- 8.5 - 1.6 1.1 - .76 1.6 1.1 - 1.4 - .67 - 9.7 1.7' 1/' 08
' n ?"1 / ^ - 1 9l t-
112
Table 29. Discharge measurements, in cubic feet per second,
of Innem River (16899830)
Location; Lat 5°19'49" N., long 163 000'27" E., at concrete road bridge,
0.5 mi upstream from mouth and 1.4 mi southeast of Mount Mutunte.
Altitude is 10 ft (from topographic map).2 Drainage area; 1.82 mi .
Period of record; 1971-74, 1977-83.
A. At location of partial-record station
Date
Sept. 30, 1971 -Nov. 10, 1971 Aug. 15, 1972 Sept. 20, 1972 Oct. 13, 1972 Nov. 17, 1972 Dec. 11, 1972 Jan. 10, 1973 Feb. 16, 1973 Mar. 13, 1973 Apr. 3, 1973 -June 8, 1973 June 20, 1973 Aug. 1, 1973 -Sept. 24, 1973 -Oct. 17, 1973 Nov. 28, 1973Dec. 11, 1973 Mar. 25, 1974 Apr. 3, 1974 -Aug. 19, 1974 Oct. 29, 1977 Jan. 18, 1978 Mar. 1, 1978 -
Di scharge
21 12 12 9.9 6.2
2.1 7.5 4.5 3.8 3.6 - 6.0 8.4 6.7 4.2 6.6 6.6 6.7 8.8 7.7 6.5
8.0 - 4.1 12 6.3
Date
Apr. 12, 1978 June 9, 1978 July 18, 1978 Aug. 4, 1978 Aug. 31, 1978 July 25, 1979Jan. 29, 1980 Feb. 11, 1980 Feb. 20, 1980 Apr. 17, 1980 May 13, 1980 June 26, 1980 July 8, 1980 Aug. 7, 1980 Aug. 19, 1980 Oct. 2, 1980 Oct. 27, 1980 Jan. 2, 1981 Mar. 31, 1981 Mar. 16, 1982 Oct. 17, 1982 Mar. 8, 1983 Mar. 31, 1983
Di scharge
- - 16- 12..... 5.3..... 4.5- 12- - 17..... 4.7- 6.8. 9.5- 20..... 25- 12-- 7.3----- 8.1..... 5.9..... 3.2..... 9.4- 7.2..... 3.9- 22- 11.2- 2.7- .21
113
Table 29. Discharge measurements, in cubic feet per second, of Innem River Cont i nued
B. Seepage investigation on March 16, 1982
[No rain during the day]
Time
Lat i tude
north 5°
Long! tude
east 163°
Altitude
(ft)
Di scharge
(ft3/s) Location
1320 19'49" 00'28"
1600 19'39" 59'57"
1640 19'42" 59'41"
10
1400 19'45" 00'12" 20
1420 19'44" 00'03" 25
45
70
22 At low-flow partial-record
station.
19 0.35 mi upstream from station.
15 50 ft upstream from left-bank
tributary (discharge at 1440
4.8 ft3 /s) and 0.55 mi
upstream from station.
11 50 ft upstream from right-bank
tributary (discharge at 1530;
2.4 ft 3 /s) and 0.8 mi
upstream from station.
10 1.0 mi upstream from station.
114
Table 30. Discharge measurements, in cubic feet per second,
of Pukusruk River (16899850)
[Formerly published as Pakusrik River]
Location: Lat 5°21 l Or i N., long 163°00 I 37" E., 20 ft downstream from new
diversion dam, 0.7 mi upstream from mouth, and 1.2 mi east of Mount
Mutunte. Altitude is 175 ft (estimate from stadia survey to base of
diversion dam).2 Drainage areat 0.27 mi .
Period of record: 1974-75, 1980-83.
Date Discharge Remarks
80 ft downstream from diversion dam
Feb. 22, 1974 0.73 Dam not in use.Aug. 19, 1974 1.3 Do.Apr. 2, 1975 .62 Do.Jan. 28, 1980 .16 Dam in use.Feb. 13, 1980 .15 Do.Mar. 18, 1980 5-5 Do.Apr. 18, 1980 .69 Do.Oct. 21, 1982 .05 Do.Mar. 8, 1983 0 Do.
50 ft upstream from diversion dam
May 13, 1980 3.2Aug. 7, 1980 .75Aug. 19, 1980 .56Apr. 1, 1981 .40Oct. 31, 1981 1.0Oct. 21, 1982 .92Mar. 8, 1983 .07Mar. 31, 1983 .14
115
Table 31 Discharge measurements, in cubic feet per second,
of Yekula River (16899900)
Location: Lat 5°21'5V' N., long 163°00'16" E., 0.3 mi upstream from mouth
and 1.5 mi northeast of Mount Mutunte. Altitude is 15 ft (from topographic
map).2 Drainage area: 0.15 mi .
Period of record: 1971-73.
Date Discharge Date Di scharge
M -*w '
JuneSept Nov.Nov. Nov.Nov.lut _ ..Mar .A i in
> 1971 1.3- > i j i * * . j73 1Q71 ---- Q?*. j , i j 1 i » _?t.
30, 1971 1.24, 1971 184 1Q71 _ _____ 16 , 1 ./ / I 1 O
4, 1971 - 15k, 1971 13 1 1Q72 ---- £7.1 , 1 7/ * . « j1C 1Q79 -- 7Q
Sept. 15, 1972 0.83Dpr 11 1Q7? -------- lil\J Ct* * 1 1 j 1 ^ / t. " 1
Jan. 10, 1973 0Jan. 15, 1973 0Mar. 13, 1973 0Apr. 3, 1973 - - 0Anr ?k 1Q73 __-_--_- 1 ?npr . £.1 1 \j / j i . t.June 20, 1973 .50Ho/- 11 1Q77 _ _____ Cft
116
Miscellaneous si tes
Table 32. Discharge measurements, in cubic feet per second.
Loca-
t ion
Walung
River.
Tribu
tary to
Pacific
Ocean.
at miscellaneous sites
Drainage
area Measurement
Location
Lat 50 18'25" N., long 162O55'01",
below diversion dam , 0.2 mi
2 (mi ) Date Di
0.03 5-17-80 10-20-82
scharge
0.32
upstream from mouth and 1.7 mi
west of Mount Wakap. Altitude
is 65 ft, from topographic map.
Walung Pacific About the same location, above
River. Ocean. diversion dam.
.03
Finkol Pacific Lat 5°17 I H" N., long 162°59'04" E., 1.70
River. Ocean. 0.2 mi upstream from Menka River
and 1.7 mi south of Mount Finkol.
Altitude is 25 ft, from topographic
map.
Finkol Pacific Lat 5°17 I 05 11 N., long 162O5&*5(>" E.,
River. Ocean. at confluence with Menka River.
Altitude is 20 ft, from topographic
map.
4-2-81
10-20-82
4-4-81
I/
2/
Water is diverted from concrete diversion dam through a 3-inch pipe.
Est imated.
.02
.10
31
3-20-82 23
10-15-82 15
3-6-83 3.8
117
Time
Table 33- Seepage investigation of Finkol River on March 6, 1983
[No rain during the day; flow represents base flow conditions]
Latitude Longitude
north east Altitude Discharge163' (ft) (ft 3/s) Locat ion
1100 17'04"
1130 17'06" 58'55"
1205 17'08"
1250 59'13"
1330 17'33" 59'24"
1540 17'39" 59'28"
1500 17'49" 59'35"
1415 18'03" 59'33"
20
20
22
30
125
120
180
260
5.0 100 ft downstream fromconfluence with Menka River.
3.8 100 ft upstream from confluence with Menka River.
.17 At mouth of right-banktributary draining swampy area between Menka and Finkol Rivers.
2.11 200 ft upstream from right- bank tributary (dry) and 0.4 mi upstream from confluence with Menka River.
.01 At mouth of left-bank tributary entering Finkol River 0.7 mi upstream from confluence with Menka River.
2.2 100 ft downstream from right- bank tributary (discharge at 1530: 0.07 fWs) and 0.8 mi upstream from confluence with Menka River.
1.8 100 ft downstream from left- bank tributary (discharge at 1435: 0.10 ft 3 /s) and 1.0 mi upstream from confluence with Menka River.
1.5 0.95 mi south of Mt. Finkol and 1.25 mi upstream from confluence with Menka River.
118
Water and Air Temperatures and Instantaneous Discharges
Table 34. Water and air temperatures and instantaneous dischargesat Mutunte River
Date Time
Instan taneous
discharge
(ft 3 /s)
Water temper ature
Airtemper ature
June 5, 1971 1200July 7, 1971 - 0950Mar. 1, 1972 0920Mar. 13, 1972 1350Mar. 27, 1972 - 1530Apr. 10, 1972 1020Apr. 24, 1972 1030May 8, 1972 1050June 8, 1972 1010June 22, 1972 1010July 6, 1972 1010July 17, 1972 1020Aug. 3, 1972 1500Aug. 11, 1972 1040Sept. 12, 1972 1030Sept. 15, 1972 0940Sept. 26, 1972 1130Oct. 11, 1972 1050Oct. 27, 1972 0950Nov. 8, 1972 1010Nov. 20, 1972 1200Nov. 29, 1972 1110Dec. 6, 1972 0950Dec. 19, 1972 1030Jan. 3, 1973 1050Jan. 22, 1973 1240Feb. 6, 1973 1000Feb. 20, 1973 1000Mar. 5, 1973 1100Mar. 26, 1973 0950Apr. 10, 1973 0940Apr. 17, 1973 1000May 14, 1973 0950June 7, 1973 1010June 19, 1973 1000June 30, 1973 0920July 16, 1973 1000Sept. 27, 1973 0940Oct. 11, 1973 1040Oct. 26, 1973 1200Nov. 5, 1973 1100Nov. 21, 1973 1010
3.47.58.3123.13.49.23.73.32.59.12.96.44.6
104.92.62.63.85.7 2.0
152.1
132.11.81.51.72.72.24.2
154.02.9 2.5 1.87.1 3.0 4.8 3.4 4.5 7.5
252425242524242525252524252526252525242525262526252525242525252625262525252525252526
119
Table 34. Water and air temperatures and instantaneous dischargesat Mutunte River Continued
Date
Dec. 4, 1973 Dec. 18, 1973 Jan. 8, 1974 Jan. 22, 1974 Feb. 4, 1974 Feb. 12, 1974 Feb. 20, 197^ Mar. 13, 1974 Mar. 18, 1974 Mar. 26, 1974 Apr. 8, 197^ Apr. 15, 197^ Apr. 23, 197^ May 13, 1974 May 20, 1974 June 24, 1974 July 8, 1974 Aug. 12, 1974 Sept. 9, 1974 Sept. 25, 1974 Nov. 20, 1974 Dec. 4, 1974 Jan. 22, 1975 Feb. 4, 1975 Feb. 11, 1975 Mar. 4, 1975 Mar. 11, 1975 Mar. 19, 1975 Mar. 25, 1975 Mar. 31, 1975 Apr. 7, 1975 Apr. 14, 1975 Apr. 22, 1975 Apr. 28, 1975 July 29, 1975 Aug. 4, 1975 Aug. 11, 1975 Aug. 21, 1975 Sept. 10, 1975 Sept. 25, 1975 Oct. 6, 1975 Oct. 14, 1975 Oct. 28, 1975 Nov. 19, 1975
Time
0930 1210 1120 0950 1320 1630 1100 1040 1030 1550 1230 1050 0910 0950 0945 1120 1035 1050 1215 1325 1235 1005 1335 1220 1035 1350 1050 1405 1155 1120 1335 1035 1150 1105 1005 1020 1505 0920 1000 1500 1120 1120 1650 1020
1 nstan-taneous
di scharge
(ft 3 /s)
9.2237.83.22.63.52.2
145.25.54.34.14.91.93.66.53.13.92.39.52.32.62.92.72.73.42.84.93.22.92.22.43.03.15.73.95.03.56.42.7
144.43.65.4
Watertemperature(°0
24262525252525.526262525252525252625252626262526252525252525252525252526252628262626262525
Airtemperature(°0
_ _
-- --292928.5 32 32 3131 29 -- ---- -« 2830313232303029
120
Table 3^. Water and air temperatures and instantaneous dischargesat Mutunte River Continued
Date
Dec. 1, 1975 -Dec. 22, 1975 Dec. 30, 1975Jan. 1^4, 1976 Jan. 21, 1976 Feb. 3, 1976 -----Mar. 1, 1976 June 17, 1976 June 22, 1976 July 19, 1976 Aug. 9, 1976 -----Aug. 2k, 1976 Aug. 28, 1978 <;«nl- 1Q 1Q7Q -__
Time
1005 - 1035 - 1135---- 1635 - 1135 10^5 - 1345 1100 1120 1050 1250 - 1115 1^5 ____ imc
Instan taneous
di scharge
(ft3 /s)
3.4 5.4 4.9 2.7 3.0 3.06.4
124.2
3.2 3.4 2.6 1.11 L.
Water temper ature(°0
26 26 26 26 2624
27 26 26.5 26 26 2522.5 >c c
Air temper ature<°0
30
30 30
2831 32 30 30 32 28 25.579
121
Table 35. Water and air temperatures and instantaneous dischargesat Okat River
Date Time
Instan-taneous
di scharge
(ft 3 /s)
Water temper ature
Airtemper ature
May 25, 1971 1300June 9, 1971 1700July 8, 1971 1550Aug. 9, 1971 1640Mar. 21, 1972 0900Apr. 6, 1972 0950Apr. 20, 1972 0940May 4, 1972 0750May 16, 1972 1040June 17, 1972 0900July 19, 1972 1120July 26, 1972 1620Aug. 14, 1972 1050Aug. 30, 1972 1030Sept. 21, 1972 1420Oct. 5, 1972 1420Nov. 2, 1972 1220Nov. 21, 1972 1310Dec. 28, 1972 1230Jan. l/, 1.7/3 i_5^uJan. 31, 1973 1350Feb. 21, 1973 1030Mar. 16, 1973 1240Apr. 6, 1973 1020May 1, 1973 - - 1530June 12, 1973 1430July 9, 1973 1140July 30, 1973 - 1550Sept. 11, 1973 1500Sept. 26, 1973 1510Oct. 18, 1973 0750Nov. 13, 1973 1540Nov. 29, 1973 1540Jan. 8, 1974 1440Feb. 5, 1974 1420Feb. 12, 1974 1100Feb. 20, 1974 1420Mar. 6, 1974 1300Mar. 27, 1974 1220Apr. 24, 1974 1540May 6, 1974 1530June 26, 1974 1150July 9, 1974 1300Aug. 6, 1974 1550Sept. 5, 1974 0900
3715229.81527339.1
297.81235125.59.09.13.43.2
135.12.82.0
175.9
18154.45.0
1015191513164.2
144.5
178.2
185158.1141013
2426252425242425242427252526252625252625252425252625252626262526252625.525.525.52526262626252524
292927.5
293227
122
Table 35. Water and air temperatures and instantaneous dischargesat Okat River--Continued
Instan- Water Air taneous temper- temper-
discharge ature ature
Date Time (ft 3 /s) (°C) (°C)
Sept. 19, 1974 1620 16 24.5 25.5Oct. 23, 1974 1235 9.1 26Nov. 12, 1974 1310 18 26Nov. 19, 1974 0845 5.4 26Dec. 3, 1974 1435 6.2 26 32Jan. 7, 1975 1235 19 26 32Jan. 28, 1975 1535 6.9 26Mar. 10, 1975 ----- 1535 7.2 25Apr. 8, 1975 ----- 1525 7-5 25Apr. 15, 1975 1110 37 26 32Apr. 21, 1975 1355 12 25Apr. 30, 1975 0950 12 25Aug. 28, 1975 1030 8.5 25 29Sept. 25, 1975 0830 5.8 26 31Oct. 18, 1975 1430 6.8 26 30Nov. 24, 1975 1300 33 26Dec. 2, 1975 1315 6.1 26 30Jan. 14, 1976 1245 6.8 26 30Feb. 4, 1976 1155 4.6 25 30Mar. 16, 1976 1645 15 28 32July 14, 1976 1200 12 26 30Aug. 12, 1976 1630 72 26 32Sept. 28, 1976 0855 8.6 26 31July 16, 1977 1300 7.7 25.5Sept. 21, 1979 1430 6.6 27 31May 15, 1980 0800 29 26
123
Table 36. Water and air temperatures and instantaneous dischargesat Melo River
Date
Nov. Dec. Jan. Feb. Mar. Apr. Sept Oct. Nov. Feb. Feb. Mar. June Aug. Aug. July Sept May
iq 1074 _ __ j , i j / "7 1Q74 _____J , ' J I n
7, 1975 -10, 1975 10, 1975 8, 1975 9C 1Q7C _____
O , 'I7/D
18, 1975 24, 1975 12, 1976 ?4 1°76 ----* " , ' j / °9, 1976 3, 1976 3, 1976 - 31, 1976 -16, 1977
. 21, 1979 15, 1980
Time
1240 1235 - 1515 1235 1405 1350 1130 1300 0930 - 1135 1150 1205 1000 1040 1100
1605 1100
1 nstan- taneous
di scharge
(ft 3 /s)
1.02.7 2.6 2.11.9 3.0.99
1.2 16 1.3 7.8 6.8 3.03.9 3.4 5.5 1.8 8.6
Water temper ature
26 26 26 25 25 25 26 26 2629 28 28 26 26 26 25 27 27
Air temper ature
32
32 32
31 32 31 28 30 28
29
Table 37. Water and air temperatures and instantaneous dischargesat Mwot and Walung Rivers
Date Time
Instan-taneous
di scharge
(ft 3 /s)
Water temper ature
Airtemper ature
May 17, 1980 Apr. 2, 1981
Mwot River
0915 9.71300 .67
2527
30.5
May 17, 1980 Apr. 2, 1981
11101230
Walung River
0.32 .02
2626
27.5
124
Table 38. Water and air temperatures and instantaneous dischargesat Palusrik River
Date Time
Instan-taneous
discharge
(ft 3/s)
Water temper ature
Airtemper ature
May 17, 1971 1340July 17, 1971 1500Mar. 6, 1972 1240Mar. 20, 1972 1440Apr. 5, 1972 1210Apr. 19, 1972 1200May 3, 1972 1050May 17, 1972 1250June 16, 1972 1040June 28, 1972 1050July 10, 1972 1230July 27, 1972 1530Aug. 7, 1972 1450Aug. 22, 1972 1110Sept. 6, 1972 1230Sept. 19, 1972 1320Oct. 3, 1972 1250Jan. 30, 1974 1330Feb. 7, 197 1* 1115May 7, 197** 1150June 15, 1974 1220July 22, 1974 1230May 16, 1980 1215Apr. 4, 1981 1630
1011116.2
106.05.84.83.82.95.15.9
203.86.36.06.83.7 2.1 3.8 4.03.7
164.2
252624252424252524252525262525252525252626262525
273232
26
125
Table 39. Water and air temperatures and instantaneous dischargesat Malem River
Date Time
Instan taneous
discharge
(ft 3/s)
Water temper ature
Airtemper ature
June 16, 1971 1520July 16, 1971 0950Mar. 7, 1972 0940Mar. 20, 1972 1100Apr. 3, 1972 1110Apr. 19, 1972 1500May 2, 1972 1200June 13, 1972 1120June 27, 1972 1010July 11, 1972 1050Aug. 9, 1972 1440Aug. 21, 1972 1330Sept. 5, 1972 1030Sept. 18, 1972 1150Oct. 2, 1972 1500Oct. 18, 1972 1220Oct. 31, 1972 1120Nov. 15, 1972 1200Nov. 24, 1972 1410Dec. 6, 1972 1520Dec. 20, 1972 0900Jan. 1, 1973 1050Jan. 8, 1973 1140Jan. 15, 1973 1410Jan. 20, 1973 1140Feb. 8, 1973 1350Feb. 23, 1973 1020Mar. 13, 1973 1510Mar. 28, 1973 1020Apr. 9, 1973 1440Apr. 18, 1973 1350Apr. 20, 1973 0950May 14, 1973 1520June 6, 1973 1410June 18, 1973 1530July 4, 1973 1030July 16, 1973 1330Aug. 1, 1973 - 1130Aug. 28, 1973 1010Sept. 14, 1973 1510Sept. 25, 1973 1430Oct. 25, 1973 1400Nov. 5, 1973 1310Nov. 19, 1973 1450
6.023 9.4 6.6
106 6.2
10 3-3 3.4 6.49.93.4
105.55.02.33.41.91.63-5 5.1 3.6 2.2 1.82.91.44.4.47
2.82.75.6
407.43.52.84.16.42.84.88.84.18.47.52.7
2525252625252525252525262525252626262625252525262525252725252525252625252525262526252525
126
Table 39. Water and air temperatures and instantaneous dischargesat Malem River Continued
Date Time
Instan-taneous
discharge
(ft 3 /s)
Water temper ature
Airtemper ature
Dec. 3, 1973 1200Dec. 17, 1973 1150Jan. 7, 1974 1120Jan. 21, 1974 1150Feb. 19, 1974 1310Mar. 8, 1974 1520Mar. 18, 197^ 1520Mar. 28, 1974 1130Apr. 9, 1974 1450Apr. 22, 197^ 1600May 8, 1974 1150July 1, 1974 1450July 23, 1974 1130Aug. 7, 1974 1120Aug. 21, 1974 1150Oct. 4, 1974 1035Dec. 4, 1974 1505Feb. 5, 1975 - 1335Feb. 19, 1975 1120Feb. 26, 1975 1105Mar. 12, 1975 1235Mar. 19, 1975 1005Mar. 26, 1975 1150Apr. 23, 1975 - - - 1330July 16, 1975 0850Aug. 3, 1975 1320Aug. 13, 1975 - - 1450Aug. 26, 1975 1330Sept. 9, 1975 1250Sept. 23, 1975 1000Oct. 8, 1975 1020Oct. 17, 1975 1630Nov. 18, 1975 1000Dec. 10, 1975 1300Dec. 31, 1975 0900Jan. 13, 1976 0930Jan. 20, 1976 1200Jan. 27, 1976 1245Feb. 11, 1976 1445Feb. 19, 1976 0955Mar. 3, 1976 0935Mar. 17, 1976 1000June 8, 1976 1510June 28, 1976 1115
1.43.0
114.01.6
1025.83.23.38.5
306.53.51.24.96.92.24.44.95.17.27.94.7
254.65.46.22.53.12.43.02.92.9
11182.73.31.61.03.96.05.22.4
13
2725262527262525252626252625272625252525262525262525262527262624262626262626292828282626
27.5
32
29
303030313229
323232322832
127
Table 39. Water and air temperatures and instantaneous discharges
Date
July 15, July 27, Aug. 10, Aug. 30, Oct. 5, Oct. 19, July 9, Aug. 28,
1976 1976 -----1976 1976
1976 1976 -----
1977 1978
at Malem
Time
----- 09^5- 1310- 1110- 1205----- 1515
1 1 orI t-J- 1200- 1000
River Continued
I nstan- taneous
di scharge
(ft 3 /s)
5. 1 2.9 4.5 2.8 1. 7 3.7 1. 7 1. 7
Water temper ature<°0
26 26 26 26 25 26 25.5 26
Air temper ature(°0
30 30 30 30 30 31
31
Table 40. Water and air temperatures and instantaneous discharges
Date
Feb. 22, 1974 Anr 7k IQlk ----------r\\Jf . £*t , lj/^
Apr. 2, 1975 ---------May 12, 1980 Anr L 1Qftl ___________
at Tafuyat River
I nstan- taneous
discharge
Time (ft3 /s)
1045 0.96 nq in 3 ?\jj\\j j t- 1^00 1 2I ~T U U 1 £.
1640 8.5iA7n 1 ii
Water Air temper- temper ature ature
25 31 oA25O£ C 0"7 C^DO ^/oOC 97 C
128
Table 41. Water and air temperatures and instantaneous dischargesat Tofol River
Date Time
Instan-taneous
discharge
(ft 3 /s)
Water temper ature
Airtemper ature
May 16, 1971 1430July 8, 1971 0940Feb. 28, 1972 0950Mar. 13, 1972 0820Mar. 27, 1972 0940Apr. 10, 1972 1400Apr. 25, 1972 0850May 9, 1972 1010June 8, 1972 1430June 22, 1972 1420July 6, 1972 1430July 17, 1972 1500July 22, 1972 1310Aug. 3, 1972 1020Aug. 15, 1972 1500Aug. 29, 1972 1030Sept. 13, 1972 0950Sept. 26, 1972 0930Oct. 10, 1972 1030Oct. 22, 1972 1450Nov. 13, 1972 1030Nov. 27, 1972 1120Dec. 12, 1972 . 1020Jan. 2, 1973 1030Jan. 16, 1973 1040Feb. 1, 1973 1020Feb. 27, 1973 0900Mar. 14, 1973 0940Apr. 2, 1973 1000May 2, 1973 1010June 13, 1973 1010July 3, 1973 - 1430Aug. 7, 1973 1200Sept. 20, 1973 0950Oct. 3, 1973 0940Oct. 30, 1973 0910Nov. 12, 1973 1020Nov. 26, 1973 1020Dec. 10, 1973 1040Jan. 14, 1974 1050Jan. 31, 1974 1420Feb. 11, 1974 1010Feb. 19, 1974 1100Mar. 8, 1974 1020
1010126.54.8
127.25.03.61.6
133.75.6
163.81.7
143.02.82.41.62.62.43.23.61.23.61.21.5
202.96.32.37.93.05.54.74.8 6.3 3.02.7
141.5
21
2624282525252525252825272625252525252626252625252525252525252525252626252525252425252626
129
Table 41. Water and air temperatures and instantaneous dischargesat Tofol River Cont i nued
Instan- Water Air taneous temper- temper-
discharge ature ature
Date Time (ft3/s) (°C) (°C)
Mar. 19, 1974 1220 3-3 25Apr. 2, 197^ 1000 5-6 25Apr. 9, 1974 1650 3-5 25Apr. 23, 1974 1430 5.2 26 30May 6, 1974 1000 3-3 25May 20, 1974 1420 4.0 25July 1, 1974 1120 5.5 25Aug. 13, 1974 1050 7.2 25 31Sept. 6, 1974 1310 2.7 26 27.5Sept. 18, 1974 1200 11 24Oct. 8, 1974 1030 9.7 26 29Nov. 29, 1974 1440 3.6 25Dec. 12, 1974 1405 7-1 26Dec. 27, 1974 1050 7-5 26 31Jan. 6, 1975 1420 4.3 26Jan. 29, 1975 1350 5.4 25Feb. 11, 1975 1450 3.2 25Feb. 18, 1975 1600 3.6 25Mar. 12, 1975 1050 3.8 25Mar. 31, 1975 1520 4.1 25Apr. 28, 1975 1420 4.6 25July 29, 1975 1450 3.0 25Aug. 21, 1975 1425 1.0 26 32Sept. 16, 1975 1405 2.2 26 31Oct. 16, 1975 0930 2.8 25 28Oct. 17, 1975 1540 2.7 26 31Nov. 17, 1975 1410 3-3 26Dec. 22, 1975 1600 9.4 26Dec. 30, 1975 1500 4.5 26Jan. 13, 1976 1500 1.7 26Jan. 20, 1976 1500 2.1 26 32Jan. 31, 1976 1330 1.3 25.5 26.5Mar. 8, 1976 1610 7-4 28 32June 18, 1976 1230 5.6 26 32June 28, 1976 1455 8.1 26 32Aug. 10, 1976 1445 3.1 26 30July 9, 1977 1140 2.4 25Sept. 20, 1979 0940 1.9 26 27
130
Table 42. Water and air temperatures and instantaneous dischargesat 1 nnem River
Date
Aug. 15, Sept. 20 Oct. 13, Nov. 17, Jan. 10, Feb. 16, Mar. 13, Apr. 3, June 8, June 20, Aug. 1, Sept. 24 Oct. 17, Nov. 28, Dec. 11, Mar. 25, Apr. 3, Aug. 19, May 13,Mar 71
1972 1079 -, ' J 1 *-
1972 1077 _ ____
1973 1973 1973
1973 1973 - 1973
1973 1Q77 _____, I J 1 J
1973 - 1973 1973 1974
1974 1974 -
1980 1Qftl _ _
Time
1035 1050 1100 1030 1030 1040 1100 0930 1700 0930 - 1330 0930- 1330 1000 - 1350 1340 1340 1200 1100
1070
I nstan- taneous
di scharge
(ft 3 /s)
129.9 6.2 2.1 4.5 3.8 3.6 6.0 8.46.7 4.2 6.6 6.66.7 8.87.7 6.5 8.0
257 Q
Water temper ature
25 25 25 25 25 25 25 25 26 2625 26 25 25 25 25 25 26 26.59C C
Air temper ature
3227. 9ft
5
131
Table 43. Water and air temperatures and instantaneous discharges
Date
Feb. Aug. Apr. May '
Apr.
22,19, 2,
' j > 1,
1974 ......1974 ......
1975 - 1980 -1981
at
Time
- 1410- 1400- 1120- 1500 - 1400
Pukusruk River
I nstan taneous
discharge
(ft 3 /s)
0.73 1.3
'.40
Water temper ature
27 29 25 2625.5
Air temper ature
2933
27.5 28
Table 44. Water temperatures and instantaneous discharges at Yekula River
Date Time
Instan taneous
discharge
(ft 3 /s)
Water temper ature
June Mar. Sept Apr. Dec.
23, 1971 I, 1972 -
. 15, 1972 24, 1973 II, 1973
10301040104009301050
0.92 .63 .83
1.2 .58
2525252525
132
Water Quality
Table 45. Chemical analyses of water from Mutunte River (16899500)
[Ft /s, cubic feet per second; pmho, micromho per centimeter at 25°C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Const i tuent Time ---
Discharge, instantaneous -
Specific conductance -_LipH
Temperature, water
Turbidity -
Oxygen, dissolved -
Hardness as CaCO- -- -----
Noncarbonate hardness -
Calcium, dissolved (Ca) -
Magnesium, dissolved (Mg) -
Sodium, dissolved (Na) ----Percent sodium ------- ---
Sodium adsorption ratio ---
Potassium, dissolved (K) -
Bicarbonate (HCO-) ----------
Alkalinity, total as CaCO- ~
Sulfate, dissolved (SO.) --
Chloride, dissolved (Cl)
Fluoride, dissolved (F) ---
Silica, dissolved (SiO-)
Sol i ds, di ssol ved,
sum of constituents --
Ni tr i te plus nitrate,dissolved as N
Iron, dissolved (Fe) --------
Manganese, dissolved (Mn) -
ft 3 /s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
yg/Lyg/L
5-2-71 1500
4.3686.4
25.5
--
26
0
3.9
3.9
3.3
.3
36
30
.2
4.0
.1
18
52
9-19-79 1130
1.4
83
7.6
25.5
8.3
33
55.2
4.8
4.1
21
.3
.4
28
6.6
3.7
.1
22
64
0
30
2
5-1*1-80 -1/10-30-81 1400 0935
4.9
63
7.1
26.0
1.6
8.0
23
53.5
3.5
3.1
22
.3
.3
18
2.5
4.4
0
15
43
0
20
< 3
2.7
84
7.9
25.0
32
1
5.9
4.2
5.0
25
.4
.5
31
6.0
.1
19
69
.17
32
2
10-20-82 1020
1.2
85
7.1
25.5
30
0
4.7
4.4
3.5
20
.3
.4
35< 5
4.9
.1
21
<.10
9< 1
At dam upstream from gaging station, lat 5°21'31" N., long 162°59'27" E.,
altitude 180 ft (from topographic map).
133
Table 46. Chemical analyses of water from Okat River (16899600)
[Ft /s, cubic feet per second; ymho, micromho per centimeter at 25 C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Const i tuent Time -
Discharge, instantaneous
Specific conductance ------_upH
Temperature, water -- ----
Turbidity -- ---- -
Oxygen, dissolved -- - --
Hardness as CaCCL ---------
Noncarbonate hardness -----
Calcium, dissolved (Ca)
Magnesium, dissolved (Mg) -
Sodium, dissolved (Na) ----
Percent sodium ---- ------
Sodium adsorption ratio -
Potassium, dissolved (K)
Bicarbonate (HCO ) -
Alkalinity, total as CaCO --
Sulfate, dissolved (SO, )
Chloride, dissolved (Cl) -
Fluoride, dissolved (F) ---
Silica, dissolved (Si02 )
Solids, dissolved,sum of constituents -- --
Nitrite plus nitrate,dissolved as N - -- --
Iron, dissolved (Fe) ------
Manganese, dissolved (Mn)
ft3 /s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
yg/Lyg/L
8-9-71 1600
10
89
7.0
24.0
1.0
350
7.1
4.3
3.9
.7
44
36
4.0
4.0
.1
21
69
9-21-79 1430
6.7
977.3
27.0
7.2
352
7.4
4.0
3.7
18
.3
.6--
3311
3.3
.1
18
69
0
670
20
5-15-80 0800
29
69
7.1
26.0
4.4
7.6
27
0
5.4
3.3
3.0
19
.3
.7
27
4.0
3.8
.1
15
52
.03
280
20
11-2-81 1205
5.8
937.6
26.5
38
4
7.8
4.6
3.8
17
.3
.6
34< 5
11
.1
18
73
.18
520
34
10-19-82 1615
8.8
957.0
26.5
34
0
7.1
4.0
3.6
18
.3
.7
39< 5
3.9
.1
19
< .10
430
31
134
Table 47. Chemical analyses of water from Melo River (16899620)
[Ft /s, cubic feet per second; ymho, micromho per centimeter at 25°C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Const i tuent Time ---
Discharge, instantaneous -
Specific conductance - . LJpH
Temperature, water -- ------
Turbidity - --
Oxygen, dissolved ---------
Hardness as CaCO _______
Noncarbonate hardness -------
Calcium, dissolved (Ca) ---
Magnesium, dissolved (Mg) - Sodium, dissolved (Na) --
Percent sodium ---- _--_
Sodium adsorption ratio ---
Potassium, dissolved (K) -
Alkalinity, total as CaCO, --
Sulfate, dissolved (SO.) --
Chloride, dissolved (Cl)
Fluoride, dissolved (F)
Silica, dissolved (SiO~) --
Solids, dissolved, sum of constituents -----
Solids, dissolved,
ton per acre foot ----
Nitrite plus nitrate, dissolved as N -
Iron, dissolved (Fe) - -----
Manganese, dissolved (Mn) -
ft3/s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ton/ac-f t
mg/L ug/L yg/L
9-21-79 1630
1.8 131 7.7
30.0
8.0
53
3 11
6.2
4.1
14
.2
.7
50
10
3.2
.1
21
87
.12
0
340
7
5-15-80 1100
8.6
88
7.2
27.0
2.3
8.0
36
8
7.0
4.4
3-3
17
.2
.6
28
8.6
3-5
.1
17
62
.08
0
150
6
11-2-81 0935
1.9
124
7.9
26.5
56
5 12
6.3
4.6
15
.3
.7
51
5.0
2.6
.1
20
82
.11
.16
220
7
10-19-82 1200
1.7
130
7.2
26.5
53 0
11 6.1 4.1
14 .3 .6
57 5 3.7 .1
21
86
<.10 200
7
135
Table 48. Chemical analyses of water from Paiusrik and Finkol Rivers
[Ft /s, cubic feet per second; ymho, micromho per centimeter at 25 C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Paiusrik River 16899700
Const i tuent Time
Discharge, instantaneous --
Specific conductance - -»upH
Temperature, water ----- -
Turbidity - -- ----
Oxygen, dissolved - -
Hardness as CaCO - - -
Noncarbonate hardness - --
Calcium, dissolved (Ca)
Magnesium, dissolved (Mg)
Sodium, dissolved (Na) Percent sodium ---
Sodium adsorption ratio
Potassium, dissolved (K) --
Bicarbonate (HCO )
Alkalinity, total as CaCO
Sulfate, dissolved (SO.)
Chloride, dissolved (Cl) --
Fluoride, dissolved (F) -
Silica, dissolved (SiO-) --
Solids, dissolved,
sum of constituents
Ni tr ite plus nitrate,
dissolved as N --
Orthophosphate (PO, )
Aluminum (Al ) --- --_-
Zinc (Zn)
Chromium (Cr) - --- ----
Lithium (Li)
Strontium (Sr) ---- --
Iron, dissolved (Fe) --
Manganese, dissolved (Mn) -
ft 3 /s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L mg/L yg/L yg/L yg/L yg/L yg/L yg/L yg/L
10-19-71 1030
6.5
73 6.5
24.0
2.0
28
0
4.7
3.9
3.7
.4
36
30
2
5.0
.1
20
58
.1
120
40
10
0
20
480
30
5-16-80 1230
16
39
7.0
25.0
^.4
8.2
12
3 2.0
1.8
2.4
29
.3
.2
9
2.2
3-9
0
8.9
27
0
140
9
4-4-81 1630
4.2
68
7.4
25.0
5.4
7.1
25
4
4.2
3-5
3.1
21
.3
.3
21
.5
4.6
.1
17
46
.02
170
1
10-15-82 1300
5.8
58
26.0
19
0
3.3
2.6
2.8
24
.3
.3
24 < 5
4.2
< .1
15
< .10
100
5
Finkol River 16899690
4-4-81 1400
31
68
7.7
25.0
3.5
7.9
26
2
4.3
3.6
2.9
19
.3
.5
24
1.5
5.6
.1
13
46
.04
150
4
10-15-82 1030
15
82
26.5
32
0
5.5
4.4
3-0
19
.3
.4
37 < 5
3.4
.1
19
< .10
160
10
136
Table 49. Chemical analyses of water from Hal em River (16899750)
[Ft /s, cubic feet per second; umho, micromho per centimeter at 25 C; NTU, nephelometr ic turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Constituent Time -
Discharge, instantaneous
Specific conductance --- ---~ LJ
Turbidity - _-___._ _
Oxygen, dissolved ----
Hardness as daCCL
Noncarbonate hardness -
Calcium, dissolved (Ca)
Magnesium, dissolved (Mg) - Sodium, dissolved (Na) -
Percent sodium -- - ----
Sodium adsorption ratio -- -
Potassium, dissolved (K) -- Bicarbonate (HCO )
Alkalinity, total as CaCO
Sulfate, dissolved (SO, )
Chloride, dissolved (C1) Fluoride, dissolved (F) ---
Silica, dissolved (SiO^) -
Solids, dissolved, sum of constituents
Sol i ds, dissolved,ton per acre foot --- ----
Nitrite plus nitrate, dissolved as N -- ----
Iron, dissolved (Fe) -- --
Manganese, dissolved (Mn)
ft3 /s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ton/ac-f t
mg/L ug/L yg/L
6-2-71 1430
90
6.7
36
0
6.9
4.6
4.1
.6
45
37 0
5.5
.1
23
67
100
9-18-79 1200
1.4
119
7.2
27.0
2.0
8.2
44
2
8.8
5.3
4.5
18
.3
.7
42
7.6
4.4
.1
25
82
.11
0
60
2
5-12-80 1500
26
59 7.0
26.5
9.2
8.2
23
7 4.1
3.0
2.9
21
.3
.6
16
5.6
5.0
0
12
43
.06
0
120
6
10-28-81 1600
0.75
116
7.8
28.0
48
0
9.1
6.2
4.7
17
.3
.7
53 < 5
4.8
.1
25
76
.10
.17
28
3
10-18-82 1610
2.7
110
7.4
26.5
41
0
7.7
5.3
4.2
23
.3
.7
48< 5
4.6 .1
23
<.10
22
1
137
Table 50. Chemical analyses of water from Tofol River (16899800)
[Ftvs, cubic feet per second; ymho, micromho per centimeter at 25°C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
yg/L, micrograms per liter]
Const i tuent Time -
Discharge, instantaneous
Specific conductance ------_ it
1 wlllLJ CIQlUlw, WGLwl
Turbidity _-___- _____
Oxygen, dissolved _______
Hardness as CaCO
Noncarbonate hardness _____
Calcium, dissolved (Ca)
Magnesium, dissolved (Mg) -Sodium, dissolved (Na) --
Percent sodium - ---------
Sodium adsorption ratio ---
Potassium, dissolved (K) Bicarbonate (HCO )
Alkalinity, total as CaCO, --
Sulfate, dissolved (SO.) -
Chloride, dissolved (Cl)
Fluoride, dissolved (F) ---
Silica, dissolved (SiO ? ) --
Solids, dissolved,sum of constituents - ----
Sol i ds, di ssol ved,ton per acre foot ---------
Ni tr ite plus nitrate,dissolved as N -- -- --
Iron, dissolved (Fe) -
Manganese, dissolved (Mn) -
l
ft3/s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ton/ac-f t
mg/L
yg/Lyg/L
t-5-711515
95
6.2
370
7.5
4.4
4.2
.7
46
38
.4
5.0
.2
23
72
0
200
9-20-79 1030
1.9
126
7.7
26.0
8.4
48
4
10
5.6
4.5
17
.3
.8
44
12
3.8
.1
27
90
.12
0
50< 1
5-13-80 1000
9.9
101
7.2
26.5
1.6
8.2
40
9
8.1
4.7
4.3
19
.3
.8
31
9.8
4.4
.1
24
75
.10
.03
90
4
10-29-81 1000
8.3
82
7.3
26.0
3510
7.7
3.9
3.4
17
.3
.1
25
6.0
3.5
.1
18
59
.08
.17
110
4
10-16-82 1225
5.3
110
7.1
26.0
43
0
9.6
4.7
4.1
17
.3
.9
45< 5
3.9
.1
23
<.10
51
3
138
Table 51« Chemical analyses of water from low-flow partial-record stations
[FfVs, cubic feet per second; ymho, micromho per centimeter at 25°C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
pg/L, micrograms per liter]
Tafuyat River 16899780
Const i tuent
Discharge, instantaneous
pH
Magnesium, dissolved (Mg)
Potassium, dissolved (K)
Alkalinity, total as CaCO
Sulfate, dissolved (SO.)
Chloride, dissolved (Cl)
Fluoride, dissolved (f)
Silica, dissolved (SiO )
Solids, dissolved,
Nitrite plus nitrate,
Manganese, dissolved (Mn) -
ft 3 /s
Umho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
pg/L
5-12-80 1630
8
130
7
26
4
8
57
10
13
6
15
1
47
95
21
88
230
20
.5
.5
.3
.2
.0
.7
.3
.1
.2
.1
.1
.01
10-15-82 1535
1
180
7
26
82
0
19
8
5
12
1
89
64
27
125
10
1
.7
.4
.0
.3
.3
.2
.2
.2
.10
1 nnem River 16899830
5-13-80 1100
25
139
8.2
26.5
8.2
35 11
6.7 4.4
3.8
19
.3
.7
24
104.6
.1
18
63
.05 190
20
10-17-82 1025
11
120
7.1
26.5
46
0
9.4
5.5
4.2
16
.3
.7
49
6
4.5
.1
20
80
230
28
5-13-80 1500
3.2
98
7.4 26.0
8.2
39
9 6.6
5.5 4.7
20
.3
.5
304.96.2
.1
19
66
090
4
Pukusruk River- 16899850
4-1-81 1600
0.40
148
7.6
25.5 .8
7.8
59 4 9.8
8.3
5.7
17
.3
.4
55.7
5.8
.1
26
90
.02
80
< 1
10-31-81 1150
1.0 115
7.8
53 2
8.6
7-7
5-9
19
.4
.5
51< 5
5.1.1
23
87
.18 90 10
10-21-82 1100
0.92
130
7-4
26.5
50
0 8.6
7.0
5-3
18
.4
.6
57< 5
5.8
.1
23
16
1
For chemical analysis of water from Pukusruk River sampled at Siba faucet at Lelu, see table 53-
139
Table 52. Chemical analyses of water from Mwot and Walung Rivers
[Ft /s, cubic feet per second; umho, micromho per centimeter at 25 C;NTU, nephelometric turbidity units; mg/L, milligrams per liter;
ug/L, micrograms per liter]
Mwot River 16899670
Const i tuent Time -
Discharge, instantaneous
Specific conductance _LJpH
Temperature, water --------
Turbidity -
Oxygen, dissolved - -- --
Hardness as CaCCL
Noncarbonate hardness -
Calcium, dissolved (Ca) -----
Magnesium, dissolved (Mg)
Sodium, dissolved (Na) -Percent sodium -
Sodium adsorption ratio -
Potassium, dissolved (K) --
Alkalinity, total as CaCO
Sulfate, dissolved (SO.)
Chloride, dissolved (Cl) ----
Fluoride, dissolved (F) -
Silica, dissolved (SiO.) -
Solids, dissolved,
sum of constituents -
Nitrite plus nitrate,dissolved as N ------
Iron, dissolved (Fe) -- --
Manganese, dissolved (Mn) -
ft3 /s
ymho
°C
NTU
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
percent
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
mg/L
ug/Lug/L
4-2-81 1300
0.6?
71
7.4
26.0
1.4
7.0
27
3
3.8
4.2
2.8
18
.2
.2
24
.6
3.3
.1
13
43
.01
330
8
10-20-82 1555
1.3
60
7.3
27.0
20
0
3.0
3.1
2.4
20
.3
.3
25
< 5
3.6
.1
11
<.10
130
10
Wal ung River 16899680
4-2-81 1230
0.02
75
7.9
26.0
2.4
7.8
26
1
3.6
4.1
3.1
21
.3
.1
25
.1
3.7
.1
11
41
.01
20
< 1
10-20-82 1650
0.10
70
7.2
26.0
26
0
4.1
3.82.9
20
.3
.1
29
< 5
3.8< .1
11
<.10
12
1
140
Table 53. Chemical analyses of water from miscellaneous sources
[umho, micromho per centimeter at 25°C; mg/L, milligrams per liter;yg/L, micrograms per liter]
Spring at Tafunsak
beachConstituent 5-2-71
Time
Specific conductance -- umho 777pH 6.5
Temperature, water °C 25.5
Hardness as CaCO_ mg/L 165
Noncarbonate hardness mg/L 64
Calcium, dissolved (Ca) mg/L 33
Magnesium, dissolved (Mg) mg/L 20
Sodium, dissolved (Na) mg/L 87
Potassium, dissolved (K) mg/L 3.7
Bicarbonate (HCO-) mg/L 124
Alkalinity, total as CaCO mg/L 102
Sulfate, dissolved (SO.) mg/L 22
Chloride, dissolved (Cl) mg/L 162
Fluoride, dissolved (F) mg/L .2
Silica, dissolved (SiO ) mg/L 23
Soli ds, di ssolved,
sum of constituents - mg/L 412
Nitrate, as NO mg/L 0
Iron, dissolved (Fe) ug/L 200
Manganese, dissolved (Mn) ug/L
Arsenic, dissolved (As) ug/L
Cadmium, dissolved (Cd) ug/L
Chromium, dissolved (Cr) ug/L
Copper, dissolved (Cu) ug/L
Lead, dissolved (Pb) ug/L
Mercury, dissolved (Hg) ug/L
Zinc, dissolved (Zn) ug/L
Siba rain catchment,
Lelu 4-6-811800
Siba faucet (Pukusruk R. water at Lelu)
10-31-81 1530
*58
* 9.2
26.0
70
10
0
2
4
2
4
0.0
220
115
7.7
30.0
54
38.8
7.8
5.9.5
51
5.013
.1
23
95
70
10
.16
* Specific conductance and pH of a water sample collected on October 31, 1981
were 60 umho and 8.9 units (by Geological Survey's Denver Laboratory).
141
REFERENCES
Bryan, E. H., Jr., 1946, A geographic summary of Micronesia and notes on the
climate of Micronesia: U.S. Commercial Co., Economic Survey, v. 2-1,
102 p.
Hawaii Architects and Engineers, 1968, Trust Territory physical planning
program: Honolulu, Hawaii.
Institute of Human Relations, Yale University, 1943, Meteorology of the Caroline
Islands: Strategic Bulletins of Oceania, No. 7, 18 p.
Kosrae Census, 1973, Unpublished typewritten report in U.S. Geological Survey
files, Honolulu, Hawaii, p. 2-8.
Mitteilungen von Forschungreisenden und Gelehrten aus den deutschen Schutz-
gebieten [Communications from explorers and scientists from the German
protectorates]: Annual publications, Berlin, 1905, p. 373; 1913, p. 352-
353.
Piper, A. M., 1946-47, Water resources of Guam and the ex-Japanese mandated
islands in the western Pacific: Unpublished typewritten report in U.S.
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