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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 7: Hydroinformatics : A unified approach for sediment routing over partially non-erodible bottoms and wetting-drying areas
A unified approach for sediment routing over partially non-erodible bottoms and wetting-drying areas
Author : F. Rulot, B. J. Dewals, P. Archambeau, S. Erpicum and M. Pirotton
In depth-averaged flow and morphodynamic models based on explicit time integration, two specific difficulties can arise during a computation: the computed value of water depth can be negative and the computed sediment level can become lower than the level of a non-erodible bottom (concrete, bedrock and armoured layer for instance). The original developments presented in this paper consist in a single procedure to correct the non-physical sediment levels and water depths. The method, based on iterative limitation of the outward fluxes, is perfectly mass conservative and remains computationally efficient. The new procedure has been incorporated in an existing finite volume model. The resulting model has been validated with several 1D benchmarks leading to configurations with dry areas and sediment transport over non-erodible bottom. The computation time has been verified not to increase by more than 15%.
File Size : 511,451 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 7: Hydroinformatics
Date Published : 01/07/2011
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