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

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  • Basile Lavoie

    (École Polytechnique de Montréal)

  • Tew-Fik Mahdi

    (École Polytechnique de Montréal)

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.

Suggested Citation

  • Basile Lavoie & Tew-Fik Mahdi, 2017. "Comparison of two-dimensional flood propagation models: SRH-2D and Hydro_AS-2D," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 86(3), pages 1207-1222, April.
    • Handle: RePEc:spr:nathaz:v:86:y:2017:i:3:d:10.1007_s11069-016-2737-7
    DOI: 10.1007/s11069-016-2737-7
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    References listed on IDEAS

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    1. Justin McKibbon & Tew-Fik Mahdi, 2010. "Automatic calibration tool for river models based on the MHYSER software," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 54(3), pages 879-899, September.
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