FLOOD01682

• County: Fremont
• Community: Florence
• Title: Hydrologic Analysis for Coal Creek and Oak Creek in the Vicinity of Florence
• Date: 9/1/2000
• Prepared For: CWCB
• Prepared By: US Army Corps of Engineers
• Floodplain - Doc Type: Floodplain Report/Masterplan

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IT
10
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OAK CREEK BASIN FLORENCE, CO
500-YR, 24-HR RAINFALL
JUNE 2000--LISA A. DEBETTIGNIES

MULTI-BASIN MODEL - MODELED WITH SCS DIMENSIONLESS UNIT HYDROGRAPH

HYETOGRAPH IS SCS TYPE II
UNIT HYDROGRAPHS FROM KIRPICH Te
Te ~ 0.0078 * L^. 77 * S^-. 385 AND "TLAG"
LOSS RATES ARE SCS CURVE NUMBER
15 30JUNOO 0015 300
5

0.6*Te

*DIAGRAM
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KK MOC-P MAIN OAK CREEK (UPPER WATERSHED JUST NORTH OF SILVER PARK CREEK)
KM COMPUTE RUNOFF HYDROGRAPH FOR SUBAREA MOC-P
BA 6.98
* TOTAL 500-YR 24-HR RAINFALL
PB 4.75
* RAINFALL PATTERN IS SCS TYPE II
IN 15
PC 0 .0020 .0050 .0080 .0110 .0140 .0170 .0200 .0230 .0260
PC .0290 .0320 .0350 .038 .0410 .0440 .0480 .0520 .0560 .0600
PC .0640 .0680 .0720 .0760 .0800 .0850 .0900 .0950 .1000 .1050
PC .1100 .1150 .1200 .1260 .1330 .1400 .1470 .1550 .1630 .1720
. PC .1810 .1910 .2030 .2180 .2360 .2570 .2830 .3870 .6630 .7070
PC .7350 .7580 .7760 .7910 .8040 .8150 .8250 .8340 .8420 .8490
PC .8560 .8630 .8690 .8750 .8810 .8870 .8930 .8980 .9030 .9080
PC .9130 .9180 .9220 .9260 .9300 .9340 .9380 .9420 .9460 .9500
PC .9530 .9560 .9590 .9620 .9650 .9680 .9710 .9740 .9770 .9800
PC .9830 .9860 .9890 .9920 .9950 .9980 1 1 1 1
* SCS CURVE NUMBER
LS 0 77
* SCS DIMENSIONLESS UNIT HYDROGRAPH FROM KIRPICH METHOD Te
UD 1.17
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KK MOC-O MAIN OAK CREEK (BEAR GULCH)
KM COMPUTE RUNOFF HYDROGRAPH FOR SUBAREA MOC-O
BA 4.52
PB 4.75
LS 0 77
UD 0.90
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KK CP-18 CONCENTRATION POINT 18
KM COMBINED THE HYDROGRAPH FOR SUBAREA MOC-O WITH THE HYDROGRAPH FOR MOC-P
HC 2

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KK RT18 ROUTING 18 (ROUTE CP-18
RS 1 STaR 0
* CROSS-SECTION MOC#10 FROM QUAD
RC 0.03 0.03 0.03 18400
RX 1000 1150 1270 1283
RY 8560 8520 8493 8483
*

TO CP-17)

FIELD NOTES

MAP AND
0.0801
1317
8483

1330 1550
8492 8520

1750
8560