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:
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-01118743
Contributor : Vincent Guinot <>
Submitted on : Thursday, February 19, 2015 - 6:28:07 PM
Last modification on : Wednesday, August 7, 2019 - 12:14:02 PM
Long-term archiving on : Sunday, April 16, 2017 - 10:32:07 AM

File

HYDROL17165R1_final.pdf
Files produced by the author(s)

Identifiers

Citation

Byunghyun Kim, Brett 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, International Association for Environmental Hydrology, 2015, 523, pp.680-692. ⟨10.1016/j.jhydrol.2015.01.059⟩. ⟨hal-01118743⟩

Share

Metrics

Record views

483

Files downloads

969