FLOOD07072

• County: Statewide
• Stream Name: South Platte
• Basin: South Platte
• Title: Water and Related Land Resources Management Study Volume IIIC - Appendix A
• Date: 7/14/1980
• Prepared For: South Platte and Tributaries
• Prepared By: CWCB
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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curve, This hydrograph is shown on plate 65. A diffusion routing

model developed from surveyed (1974) sections of the flood plain

was used to route this hydrograpn to Wiggins. The routed 100-year

flood at Wiggins was used to determine the remainder of the dis-

charge-probability curve at Wiggins by drawing a curve parallel to

the regionally developed curve. The adjusted curve at Wiggins is

shown on plate 64. It should be recognized that, because of data

inadequacies for streams in this area, there is considerable uncer-

tainity associated with probability estimates in the Kiowa Creek

basin. In addition, there is the possibility of a bias in the

regionally developed curve because of the severe floods experienced

in 1935 and 1965. Estimated error limit curves developed at Wiggins

using regional parameters indicate the magnitude of statistical

error potential. In addition, there is an undefineab1e error

associated with the application of regional criteria to any basin.

These uncertainities should be recognized in evaluating project

studies for Kiowa Creek.

BIJOU CREEK

The hydrologic studies completed for the Interim Review Report

for Bijou Creek, dated October 1970, were not updated for this

report. However, since the scope of the planning studies made for

BijouCreek in this report are preliminary, the hydrology presented

in the Interim Review Report was considered acceptable for current

planning purposes. Pertinent information from that report are

presented below.

Basin Description. Bijou Creek, a high plains tributary of

the South Platte River, originates at the boundary between the

South Platte River and Arkansas River basins about 35 miles east

50

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