Comparison of two-dimensional flood propagation models: SRH-2D and Hydro_AS-2D

Basile Lavoie () and Tew-Fik Mahdi ()
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Basile Lavoie: École Polytechnique de Montréal
Tew-Fik Mahdi: École Polytechnique de Montréal

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2017, vol. 86, issue 3, No 11, 1207-1222

Abstract: 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.

Keywords: Model comparison; Two-dimensional flow modeling; Hydro_AS-2D; SRH-2D; Automatic calibration (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s11069-016-2737-7

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