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Side-Diversion Analysis System

by John F. Burgin and E. R. Holley

ABSTRACT

A computational scheme was developed for numerical modeling of side-channel diversions and associated detention basins. The method employs HEC-1 for rainfall-runoff calculations and HEC-2 for stream hydraulics. At the beginning of this project in 1995, the sponsor requested that these programs be used. The computational scheme also uses SIDEHYD, a program that was developed for modeling flow in the channel beside a side diversion, flow over side weirs and through side-diversion culverts, and the filling and emptying of a detention basin. The computational scheme includes automated iterations between HEC-1, HEC-2, and SIDEHYD and can be used to design either one or two side-diversions and detention basins.
The empirical results for the effects of the side diversions on flow in the main channel and for the discharge characteristics of side weirs and side culverts are presented in a companion report ("Physical Modeling for Side-Channel Weirs", CRWR Online Report 02-2).
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