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Journal Articles Journal of Environmental Hydrology Year : 2015

Urban flood modeling with porous shallow-water equations: a case study of model errors in the presence of anisotropic porosity

Abstract

Porous shallow-water models (porosity models) simulate urban flood flows orders of magnitude faster than classical shallow-water models due to a re-lately coarse grid and large time step, enabling flood hazard mapping over far greater spatial extents than is possible with classical shallow-water models. Here the errors of both isotropic and anistropic porosity models are exam-ined in the presence of anisotropic porosity, i.e., unevenly spaced obstacles in the cross-flow and along-flow directions, which is common in practical applications. We show that porosity models are affected by three types of errors: (a) structural model error associated with limitations of the shallow-water equations, (b) scale errrors associated with use of a relatively coarse * Tel:
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Dates and versions

hal-01118743 , version 1 (19-02-2015)

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Byunghyun Kim, Brett F. Sanders, James Famiglietti, Vincent Guinot. Urban flood modeling with porous shallow-water equations: a case study of model errors in the presence of anisotropic porosity. Journal of Environmental Hydrology, 2015, 523, pp.680-692. ⟨10.1016/j.jhydrol.2015.01.059⟩. ⟨hal-01118743⟩
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