| Issue |
La Houille Blanche
Number 4, Août 2007
|
|
|---|---|---|
| Page(s) | 104 - 110 | |
| Section | Hydrologie Urbaine (JDHU 2006) | |
| DOI | https://doi.org/10.1051/lhb:2007054 | |
| Published online | 15 September 2007 | |
Modélisation à grande échelle des inondations urbaines et modèle 2D à porosité
Large scale modelling of urban floods and 2D shallow-water model with porosity
1
HR Wallinford (précédemment doctorant à l’UMR HydroSciences Montpellier) Howbery Park, Wallingford, Oxfordshire OX10 8BA, United Kingdom
2
Université catholique de Louvain, Unité de Génie Civil et Environnemental, 1 Place du Levant, B-1348 Louvain-la-Neuve, Belgique
3
UMR HydroSciences Montpellier, Université Montpellier II, cc. MSE, Place Eugène Bataillon, 34095 Montpellier Cedex 5 – France
Auteur de correspondance : j.lhomme@hrwallingford.co.uk
Abstract
A two-dimensional shallow-water model is presented for the simulation of urban floods. The concept of porosity is used to account for the influence of the buildings on the flow patterns in the street network without a need for a refined grid. A specific head loss formulation is used to represent singular head losses at crossroads. This model allows the main features of the flow to be represented both inside and outside the urban area while the computational effort is reduced significantly compared to a classical two-dimensional model. The singular head loss term is expressed as a function of the geometry of the street network, which makes its estimate and calibration easier.
© Société Hydrotechnique de France, 2007