Analytical and Numerical Modeling at High Sediment Concentrations

by Jeffrey B. Bradley, WEST Consultants, United States,
Robert C. MacArthur, WEST Consultants, United States,
Bobby J. Brown, WEST Consultants, United States,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Methods for classifying sediment-water mixtures according to material concentration and rheologic properties are discussed. Results from laboratory and field measurements show that bed material load increases several orders of magnitude when fine sediment concentration is greatly increased. Results from field measurements at Mount St. Helens are used to develop a modified B.R. Colby relationship for total bed material discharge that is applicable for hyperconcentrated flow conditions.

Subject Headings: Numerical models | Material properties | Numerical analysis | Sediment | Bed loads | Fluid flow | Water flow | Bed materials

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