drainage boundary definition

HYDROLOGY PROJECTTechnical Assistance

HYDROLOGY PROJECTTechnical Assistance

DRAINAGE BOUNDARY DEFINITION

HYDROLOGY PROJECTTechnical Assistance

HYMOS COMPONENTS

HYMOS IS A COLLECTION OF MANY INDIVIDUAL COMPONENTS

NETTER

HYMOS

ODS Server

Graph Server

Database

Database Server

User Interface: Database- Manager

HYDROLOGY PROJECTTechnical Assistance

Codification in HYMOS

HYDROLOGY PROJECTTechnical Assistance

General Data Structure in HYMOS

• Databases ……… Stations ……… Data

Catchment - b...

Catchment - j

Station a..

Station x..

Station y

Station Particulars/History

Time series data

Current metering data

Discharge rating data

Sediment rating data

Cross section data

Relation oriented data

HYDROLOGY PROJECTTechnical Assistance

Equidistant time series data

Station - j

Type aa..

Type ab..

Type ba

Time interval 1

Time interval 2

Time interval 3

.

.

Time interval j

HYDROLOGY PROJECTTechnical Assistance

Non-equidistant time series data

Station - j

Type pp..

Type pq..

Type qq

HYDROLOGY PROJECTTechnical Assistance

Directory Structure in HYMOS• Hymos Programs & System

• Database FilesDRIVE - X PATH ... HYMOS4

ACCESS DATABACKUPFIXEDREPORTSSYSTEM UTILS

DRIVE - y....DRIVE - z

PATH ... HYMOS DATABASES CAT1.DATCAT2.DATCAT3.DATetc.

SABARMATI.RAWDB MAPS

PATH ... XXX DIRECTORY BAS1.DATBAS2.DATBAS3.DATetc.

HYDROLOGY PROJECTTechnical Assistance

Equidistant time series code

Station - j

Type aa..

Type ab..

Type ba

Time interval 1

Time interval 2

Time interval 3

.

.

Time interval j

Station Code + Data Type Code + Time Interval Code

SERIES CODE

HYDROLOGY PROJECTTechnical Assistance

Non-equidistant time series code

Station - j

Type pp..

Type pq..

Type qq

Station Code + Data Type Code

SERIES CODE

HYDROLOGY PROJECTTechnical Assistance

Special time series codes

Station - j

Type AE (annual exceedances of fixed duration)

Type AM (monthly maximum rainfall amounts)

Station Code + Data Type Code

SERIES CODE

HYDROLOGY PROJECTTechnical Assistance

Codification

• STATION– Unique set of 1 to 12 characters to identify a station

– Also, the first part of time series code

• MEASUREMENT TYPE– Instantaneous

– Accumulative

– Constant

HYDROLOGY PROJECTTechnical Assistance

Time interval & time label

Unit Code

Calendar

Time

YEAR

MONTH

DAY

HOUR

MINUTE

1

2

3

4

5

HYDROLOGY PROJECTTechnical Assistance

Time interval

Time interval unit + DividerTime interval

Time interval unit : YEARMONTH

DAYHOUR

1234

Divider : 1 - 99

Examples : Yearly data 1, 1

Daily data 3, 1

8 Hourly data 3, 3

HYDROLOGY PROJECTTechnical Assistance

Exercise - time interval• Time intervals

– Seasonal

– Monthly

– Decade (10 days)

– Weekly

– 15 minute

– 10 minute

– Half daily

– 3 hourly

HYDROLOGY PROJECTTechnical Assistance

Answers– Time intervals Unit, Divider

• Seasonal (4 seasons) 1,4

• Monthly 2,1 or 1,12

• Decade (10 days) 2,3 *

• Weekly 1,52 *

• 15 minute 4,4

• 10 minute 4,6

• Half daily 3,2

• 3 hourly 3,8

HYDROLOGY PROJECTTechnical Assistance

Basic time interval

Basic time interval unit + Multiplier

Basic time interval

Basic time interval unit :

MonthDay

HourMinute

2345

Multiplier : 1 - 99

Examples :Decade 2, 3

Weekly 1, 52

Pentad 2, 6

3,10

3, 7

??

Data T.I B.T.I

HYDROLOGY PROJECTTechnical Assistance

Cyclic Series - Unequal intervals/Non-standard timings

Cyclic Series

Unequal time intervalsE.g., 3 observations a day at 0800, 1300, 1800 hrs.

Examples :0800, 1300, 1800 hrs. 3, 3

Daily at 0830 hrs. 3, 1

Twice Daily at 0830 & 1730 hrs. 3, 2

Cyclic

Cyclic

??

Data T.I B.T.I

Non-standard timingsE.g., Day’s observations at 0830 hrs.

HYDROLOGY PROJECTTechnical Assistance

Time Label

• Year >1850

+• Month 1-12

+• Day 1-28, 29, 30, 31

+• Hour 0-23

+• Subdivision index 1-99 = Position inside time unit

– If any of the above is not in use, then it is = 0

HYDROLOGY PROJECTTechnical Assistance

Examples - time label• 30 Jan 1989

• Decade 11-20 Feb. 76

• July 1985

• 1000 - 1030 hrs, 1/2/80

• 1030 - 1100 hrs, 1/2/80

• 1145 - 1200 hrs, 7/1/85

1989, 1, 30, 0, 1

1976, 2, 0, 0, 2

1985, 7, 0, 0, 1

1980, 2, 1, 10, 1

1980, 2, 1, 10, 2

1985, 1, 7, 11, 4

HYDROLOGY PROJECTTechnical Assistance

Exercise - time interval & time labelT Basic T Time label

• 4 seasons, 2nd season of 1991

• June 1895

• 3rd Decade August 1956

• 6 - 10 May 1972

• 21 April 1947

1,4 0,0 1991,0,0,0,2

2,1 0,0 1895,6,0,0,1

2,3 3,10 1956,8,0,0,3

2,6 3,5 1972,5,0,0,2

3,1 0,0 1947,4,21,0,1

HYDROLOGY PROJECTTechnical Assistance

Exercise - time interval & time labelT Basic T Time label

• 1600 - 2000 hrs. 31 Jan. 1985

• 1830 - 1900, 5 March 1967

• 0905 - 0906 hrs. 22 Apr. 1991

• 14th Week 1980

• 2400 h 28/2 - 0015 h. 29/2 1960

4,6 0,0 1985,1,31,0,5

4,2 0,0 1967,3,5,18,2

4,60 0,0 1991,4,22,9,6

1,52 3,7 1980,0,0,0,14

4,4 0,0 1960,2,29,0,1