Mathematical Modeling of Scour and Deposition

by William A. Thomas, (M.ASCE), Chf.; Research Branch, The Hydrologic Engrg. Center, U.S. Army Corps of Engrs., Davis, Calif.,
Alan L. Prasuhn, (M.ASCE), Prof. of Civ. Engrg.; California State Univ., Sacramento, Calif.,

Serial Information: Journal of the Hydraulics Division, 1977, Vol. 103, Issue 8, Pg. 851-863

Document Type: Journal Paper


Electronic computers are opening up the field of sedimentation engineering by permitting the analysis of problems which heretofore have required too much time and effort. Movable stream bed profiles are being calculated in addition to water surface profiles. The initial gradation of sediment material in the stream bed may be prescribed to facilitate the calculation of an armor layer. This gradation is continually changed by the computer program in response to sediment particles being deposited on the stream bed and material on the stream bed being removed to satisfy transport capacity. Hydraulic sorting of sediment by grain size is accomodated. The stream bed does not have to be represented by a single grain size. Retardance of motion because of armor layer is calculated.

Subject Headings: Bed materials | Mathematics | Mathematical models | Scour | Armor units | Sediment transport | Grain (material) | Computer analysis

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