Author(s): B. C. Phillips; A. J. Sutherland
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Keywords: No Keywords
Abstract: A one-dimensional unsteady flow and sediment routing model is described. The model has the ability to simulate spatial lag effects, which are viewed as the inability of an alluvial system to immediately overcome constrained sediment boundary condi tions, and temporal lag effects, which are viewed as the inability of an alluvial system to immediately respond to an imposed change in discharge. Spatial lag effects are directly incorporated in the model by way of a spatial lag equation while temporal lag effects are indirectly incorporated through relations for bed load transport capacity and bed roughness under unsteady flow condi tions. The performance of the model is tested by simulating unsteady flow, non-equilibr ium sediment transport exper iments conducted in a laboratory flume. Excellent agr eement is obtained between simulated and measured sediment hydrographs and yields.
Year: 1985