Comparative study of overland flow modeling with different numerical resolutions

Marie Rousseau 1 Olivier Cerdan 1 Olivier Delestre 2 Fabrice Dupros 1 Stéphane Cordier 3 Francois James 3, 4
1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 JAD - Laboratoire Jean Alexandre Dieudonné
3 MAPMO - Mathématiques - Analyse, Probabilités, Modélisation - Orléans
4 FDP - Fédération de recherche Denis Poisson
Abstract : In the last decades, more or less complex physically-based hydrological models have been developed to solve the shallow water equations or their approximations using various numerical methods. Model users may not necessarily know the different hypothesis lying behind those developments and simplifications. Therefore it might be difficult to judge if a code is well adapted to their objectives and test case configurations. Our study aims at comparing the predictive abilities of different codes and evaluating potential gain by using advanced numerical scheme for modeling runoff. We present four different codes; each one based on either shallow water or kinematic waves equations and using either finite volume or finite difference methods. We compare these four numerical codes on different test cases which allow emphasizing their main strengths and weaknesses. Results show that, for relatively simple configurations, kinematic waves equations solved with finite volume method represent an interesting option. Nevertheless, as it appears to be limited in case of discontinuous topography or strong spatial heterogeneities, for these cases we advise the use of shallow water equations solved with the finite volume method.
Type de document :
Communication dans un congrès
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https://hal-brgm.archives-ouvertes.fr/hal-00800851
Contributeur : Marie Rousseau <>
Soumis le : jeudi 14 mars 2013 - 15:34:05
Dernière modification le : vendredi 18 janvier 2019 - 01:01:34

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  • HAL Id : hal-00800851, version 1

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UNICE | BRGM | CNRS | UNIV-ORLEANS | DIEUDONNE | MSL | MSL-THESE | UNIV-COTEDAZUR | IDP | UNIV-TOURS

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Marie Rousseau, Olivier Cerdan, Olivier Delestre, Fabrice Dupros, Stéphane Cordier, et al.. Comparative study of overland flow modeling with different numerical resolutions. 8th Internationale Conference on Geomorphology - IAG 2013, Aug 2013, La Villette, France. ⟨hal-00800851⟩

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