Modeling Side-Weir Diversions for Flood Control

by J. E. Davis, US Corps of Engineers Waterways, Experiment Station, United States,
E. R. Holley, US Corps of Engineers Waterways, Experiment Station, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract: Side-channel weirs can be used for diversion to reduce flood peaks. This study has developed a means for incorporating the effects of side weirs in HEC-1 and HEC-2 calculations through an iterative procedure which also uses a new program for the weir hydraulics. The procedures can be used first to determine the required weir length and then to determine the effect of that weir on the channel discharge and stage hydrographs and on the required detention pond storage volume. The procedures have been implemented for test cases involving the reduction of a 21,400 cfs peak flow to 12,000 using one weir or using two hydraulically dependent weirs.

Subject Headings: Weirs | Hydraulics | Computer software | Floods | Water discharge | Computer analysis | Hydrographs | Detention basins

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