Comparison of two-dimensional flood propagation models: SRH-2D and Hydro_AS-2D |
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Authors: | Basile Lavoie Tew-Fik Mahdi |
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Institution: | 1.Département des génies Civil, Géologique et des Mines (CGM),école Polytechnique de Montréal,Montreal,Canada |
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Abstract: | This article presents a comparison between two two-dimensional finite volume flood propagation models: SRH-2D and Hydro_AS-2D. The models are compared using an experimental dam-break test case provided by Soares-Frazão (J Hydraul Res, 2007. doi: 10.1080/00221686.2007.9521829). Four progressively refined meshes are used, and both models react adequately to mesh and time step refinement. Hydro_AS-2D shows some unphysical oscillations with the finest mesh and a certain loss of accuracy. For that test case, Hydro_AS-2D is more accurate for all meshes and generally faster than SRH-2D. Hydro_AS-2D reacts well to automatic calibration with PEST, whereas SRH-2D has some difficulties in retrieving the suggested Manning’s roughness coefficient. |
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