Bed Load Roughness in Supercritical Flow

by Scott E. Stonestreet, US Army Corps of Engineers, Los Angeles, United States,
Ronald R. Copeland, 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 is proposed for Mission Creek located in Santa Barbara County, California. The proposed channel may transport gravels and cobbles as bed load during large flood events. Physical and numerical modelling are currently underway to determine the effect of the bed-load transport on the hydraulic roughness of the proposed channel. Preliminary results indicate a slight increase in hydraulic roughness with increased bed-load concentration. Formation of bed forms has not occurred for concentrations of less than 3000 ppm.

Subject Headings: Hydraulic roughness | Bed loads | Bed materials | Hydraulic loads | Channels (waterway) | River and stream beds | Fluid flow | California | United States

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