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Bed Load Roughness in Supercritical Flow

by Scott E. Stonestreet, (M.ASCE), US Army Corps of Engineers, Los Angeles, United States,
Ronald R. Copeland, (M.ASCE), US Army Corps of Engineers, Los Angeles, United States,
Darla C. McVan, US Army Corps of Engineers, Los Angeles, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

A supercritical concrete channel has been proposed for Mission Creek located in Santa Barbara County, California. The proposed channel could transport gravels and cobbles as bed load during large flood events. Physical and numerical modeling have been conducted to determine the effect of the bed load transport on the hydraulic roughness of the proposed channel. The results of this study indicate a slight increase in hydraulic roughness with increased bed load concentration. Formation of bed forms did not occur for concentrations of less than 3000 ppm.

Subject Headings: Hydraulic roughness | Bed loads | Hydraulic loads | Hydraulic models | Numerical models | Bed materials | Supercritical flow | California | United States

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