Depth-Averaged Hydrodynamic Model for Gradual Breaching of Embankment Dams Attributable to Overtopping Considering Suspended Sediment Transport
Publication: Journal of Hydraulic Engineering
Volume 139, Issue 6
Abstract
A numerical model for simulation of embankment dams’ gradual breaching because of overtopping, named embankments breach software (EBS), is introduced in this paper. The model solves the equations for the depth-averaged flow (modified for shallow water flow on steep slopes), the turbulence model, the sediment transport, and the bed elevation change in a coupled manner. An upwind cell center finite volume method is applied for developing the discrete form of the differential equations. A linearized scheme with second-order accuracy in space and explicit time integration on unstructured triangular meshes is utilized in this model. To simulate the flow over dry sloping surfaces of the embankment dam configuration, the developed model considers a powerful wetting and drying technique. Furthermore, the abilities of the model enhanced simulation of sudden bank failure of the breach channel because of the base erosion and transport of the failed solid material.
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Acknowledgments
The model presented in this paper is a result of a research project sponsored by the Office of Applied Researches of Iran Water Resources Management Company (IWRMC)—Ministry of Energy of I.R.Iran, under Grant No. DAM2-85116, and the authors gratefully acknowledge the support provided by the mentioned source.
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© 2013 American Society of Civil Engineers.
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Received: Aug 15, 2011
Accepted: Nov 12, 2012
Published online: Nov 13, 2012
Published in print: Jun 1, 2013
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