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Advances in Computational Mobile-Bed Hydraulics

by F. M. Holly, Jr., Univ of Iowa, United States,
J. L. Rahuel, Univ of Iowa, United States,



Document Type: Proceeding Paper

Part of: Sediment Transport Modeling

Abstract:

A new conceptual approach to one-dimensional mobile-bed simulation is briefly described, along with two demonstrative examples. The approach is based on fully coupled solution of the unsteady equations of motion for water and sediment movement. The distinctly different physics of bedload and suspended-load movement are recognized in the algorithm, which includes treatment of hydraulic sorting and armoring effects for sediment mixtures. Incorporation of a spatial-delay loading law for bedload relaxes the usual assumption of satisfaction of bedload transport capacity.

Subject Headings: Sediment transport | Hydraulic models | Bed loads | Hydraulic loads | Suspended loads | Fluid flow | Computer models

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