hydrologic and hydraulic modeling hydrologic precipitation & basin parameters, flood frequency...
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HYDROLOGIC AND HYDRAULIC MODELING
Hydrologic Precipitation & Basin Parameters,
Flood Frequency Analysis
Hydraulic Energy & Momentum Relationships
HYDROLOGIC MODELING
Hydrologic Routings Overland Flow (Rational Formula: Q = CIA)
River Channel (Muskingkum, Straddle Stagger, etc.)
Flood Frequencies e.g., 50 & 100 Year Floods(log Pearson Type III distribution)
Water Budget Analysis Droughts
Water Supply
Rule Curve
Reservoir Operations
HYDRAULIC MODELING
Steady State Step Backwater Computations(FEMA FlRM Flood Studies)
Unsteady State Dam Breach Analyses,Detail Flood Studies,Dynamic Riverine Conditions
HYDRAULIC MODELING HISTORY
Pre 1970 Paper Spreadsheets
Physical Models Logan Martin at Univ of ALFarley Nuclear Plant at Auburn Univ
US Army Corps of EngineersWaterways Experiment Station (WES)at Vicksburg, MS
Post 1970 Fortran 66 US Army Corps of EngineersHydrologic Engineering Center (HEC)at Davis, CA
HEC-1 (Basin Overland Flow)
HEC-2 (Steady State River Routings)
HEC-5 (Reservoir Operations)
HEC-6 (Sediment Transport)
HEC HMS
HEC RAS (Also Unsteady State)
RES SIM
NEXGENEXCEL Spreadsheets
HYDRAULIC MODELING HISTORY (Continued)
Post 1977
1976 Teton Dam Idaho 14 Killed
1977 Laurel Run Dam Pennsylvania 40 Killed
1977 Taccoa Falls Dam Georgia 39 Killed
HYDRAULIC MODELING HISTORY (Continued)
Post 1977 DAMBRK Dr. Danny FreadNational Weather Service (NWS)Silver Springs, MD
UNET Dr. Robert Barkauat Colorado State
DWOPER
BRANCH
FLDWAV
HEC RAS
HYDROLOGIC MODELING EXAMPLE – (Water Budget)
R L HARRISImpact of 200 CFS Minimum Flow during Peak Season
775
777
779
781
783
785
787
789
791
793
795
1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep 1-Oct 1-Nov 1-Dec
Ele
v (m
sl)
Rule Curve
Historical Average
+200 CFS Peak Season
Drought Contingency
HYDROLOGIC MODELING EXAMPLE – (Routings)
Black Warrior River
0
20000
40000
60000
80000
100000
120000
140000
1 6 11 16 21 26 31 36 41 46 51 56 61 66 71
Hours Feb 5-7 2004
Flo
w (
cfs
)
Smith Inf low
SmithDischarge
Arkadelphia
Sayre
BankheadInf low
Gaged Inf low
Poly.(BankheadInf low )3 per. Mov.Avg. (SmithInf low )
HYDROLOGIC MODELING EXAMPLE – (Flood Frequency Analysis)
R L HARRIS Reservoir Inflow(1924-2003)
-
25,000
50,000
75,000
100,000
125,000
0.101.0010.00100.00
Exceedance
Pea
k In
flo
w (
cfs)
Computed Expected 5% 95% 80 Records
500
YR
250
YR
100
YR
50 Y
R
25 Y
R
10 Y
R
5 Y
R
2 Y
R
1 Y
R
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Steady State)
HEC-RAS ROUTINGS OF LAY RESERVOIR
395
400
405
410
415
420
425
430
50556065707580859095100
Stream Miles Above Mouth of Coosa River
Ele
va
tio
n (
ms
l)
HEC-RAS 100 YR
1979
32.9K
APC Easement
APC Fee
LOGAN MARTI
LAY DAM
Ke
lly C
ree
k
S.C
.L.
R.R
.
Pa
pe
r M
illT
alla
de
ga
Cre
ek
Ta
llass
ee
ha
tch
ee
Crk
.
So
uth
ern
R.R
.
Ye
llow
lea
f C
ree
kS
EG
CO
Ste
am
Pla
nt
Ce
da
r C
ree
k
Na
rro
ws
Wa
xah
atc
he
e C
ree
k
Hw
y 2
80
Brid
ge
EXAMPLE DATA
HYDRAULIC MODELING EXAMPLE - (DAMBRK)
R L HARRIS DAM BREACHSTAGE AND TIME HYDROGRAPHS
May 2003 Flood
-
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
18.0
20.0
22.0
24.0
26.0
60708090100110120130140
Tallapoosa River Mile
Tim
e to
Pea
k E
leva
tio
n (
hr)
480.00
500.00
520.00
540.00
560.00
580.00
600.00
620.00
640.00
660.00
680.00
700.00
720.00
740.00
Time to Peak
w/ Failure
w/o Failure
R L HARRIS DAM MARTIN DAM
FIGURE 12
Page 13
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
100 200 300 400 500 600 700 800610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
RS = 1.98 IS
Station (ft)
Ele
vatio
n (ft
)
Legend
Ground
Bank Sta
.05 .035 .05
0 100 200 300 400 500 600 700630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
RS = 5.01 IS
Station (ft)
Ele
vatio
n (ft
)
Legend
Ground
Bank Sta
.05 .035
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
PROFILE OF THE TALLPOOSA RIVERFrom R L Harris Dowstream to the Wadley Gauge
595
600
605
610
615
620
625
630
635
640
645
650
655
660
665
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14
Miles Above Wadley Gauge
Ele
vati
on
(m
sl)
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
FRIDAY 753 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
SATURDAY 170 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
SUNDAY 201 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
MONDAY 323 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
TUESDAY 140 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
WEDNESDAY 182 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
THURSDAY 253 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
FRIDAY 491 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
R L HARRIS GENERATION SCHEDULE
8/25/2000
8/30/2000
8/31/2000
9/1/2000
8/26/2000
8/27/2000
8/28/2000
8/29/2000
SATURDAY 428 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
SUNDAY 209 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
MONDAY 2,322 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
TUESDAY 1,196 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
WEDNESDAY 1,653 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
THURSDAY 1,123 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
FRIDAY 1,014 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
SATURDAY 2,461 CFS
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
12
R L HARRIS GENERATION SCHEDULE
9/6/2003
9/11/2003
9/12/2003
9/13/2003
9/7/2003
9/8/2003
9/9/2003
9/10/2003
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
25 26 27 28 29 30 31 01 02Aug2000 01Sep2000
601
602
603
604
605
606
607River: Tallapoosa River Reach: Harris to W adley RS: 0.00
Tim e
Sta
ge (
ft)
Legend
3 GEOTUBES
5 GEOTUBES
EXIST RIVER
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
2 MACHINE HOURS
601.00
601.50
602.00
602.50
603.00
603.50
604.00
604.50
605.00
0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00
WS
E (
ft)
w/o Pulse Exist
w/ Pulse Exist
w/o Pulse 3 GEO
w/ Pulse 3 GEO
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
2 MACHINE HOURS
-
500
1,000
1,500
2,000
2,500
3,000
0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00
FL
OW
(c
fs)
w/o Pulse Exist
w/ Pulse Exist
w/o Pulse 3 GEO
w/ Pulse 3 GEO
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
2 MACHINE HOURS
-
0.50
1.00
1.50
2.00
2.50
3.00
0:00 3:00 6:00 9:00 12:00 15:00 18:00 21:00 0:00
VE
LO
CIT
Y (
fps)
w/o Pulse Exist
w/ Pulse Exist
w/o Pulse 3 GEO
w/ Pulse 3 GEO
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
GeoTube at RM 1.98
614
615
616
617
618
0 200 400 600 800Flow at Notch (cfs)
Ele
vati
on
(m
sl)
2.00
3.00
4.00
5.00
6.00
Vel
oci
ty (
fps)
Elevation
Velocity
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
0 2 4 6 8 10 12 14
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
R L Harris Dam downstream to Wadley Plan: 1) USS AUG00 3G 3/4/2004 2) USS AUG00 EX 3/4/2004
Main Channel Distance (mi)
Pow
er T
otal
(lb
/ft
s)
Legend
Power Total 01SEP2000 1045 - USS AUG00 3G
Power Total 01SEP2000 1045 - USS AUG00 EX
Harris to Wadley
HYDRAULIC MODELING EXAMPLE - (HEC-RAS Unsteady State)
5.87207*5.83471*
5.79735*5.76 5.722* 5.684* 5.646* 5.608* 5.57* 5.532* 5.494* 5.456* 5.418* 5.38
5.342* 5.304*
5.266* 5.228*
5.19* 5.152*
5.114* 5.076*
5.038* 5.00
4.945* 4.89
4.85* 4.81 4.77230*4.73461*4.69692*4.65923*4.62153*4.58384*4.54615*4.50846*4.47076*4.43307*4.39538*4.35769*4.32
4.28153*4.24307*
4.20461*4.16615*
4.12769*4.08923*
4.05076*4.01230*
3.97384*
R L Harris Dam downstream to Wadley Plan: 1) USS AUG00 3G 3/4/2004 2) Legend
WS 31AUG2000 2045 - USS AUG00 3G
WS -
Ground
Bank Sta
Ground