Erodible Channel Models: State of the Art Review

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ASCE Task Committee on Flood Hazard Analysis on Alluvial Fans

Document Type: Proceeding Paper

Part of: Hydraulics/Hydrology of Arid Lands (H²AL):

Abstract: This paper presents a review of existing modeling techniques, their physical and mathematical background, and applicabilities. Major areas of progress are outlined and difficulties are described to bring up-to-date recent development on mathematical modeling. An important progress in model development is the advancement from erodible-bed models to erodible-boundary models. In spite of such progress, continued research and development are still needed to expand the present modeling capabilities by including meander development and stream migration. The state-of-art review for erodible channel models is given herein according to models' dimensionality with regard to flow and changes in channel boundary. Stream channel changes include the following components: (1) Channel-bed scour and fill (or degradation and aggradation), (2) width variation, (3) curvature effects on bed topography, and (4) meander migration.

Subject Headings: Mathematical models | Erosion | Hydraulic models | Channel flow | Stream channels | Scour | Curvature |

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