Analyse de risque; Modélisation hydraulique; Crues et inondations; Flood risk analysis; Hydraulic modelling; Inundation modelling
Abstract :
[fr] La communication expose une approche cohérente pour l’analyse du risque d’inondation à micro-échelle. La méthodologie décrite s'appuie sur la cartographie détaillée de l’exposition réalisée par un modèle hydrodynamique 2D ainsi que sur des données d’occupation du sol à résolution géométrique et qualité sémantique élevées. La modélisation de l'écoulement est basée sur les équations en eaux peu profondes, résolues par le biais d'un schéma volumes finis sur maillages multiblocs structurés. Grâce à l’utilisation de données altimétriques laser de haute précision, les simulations sont à même de représenter la dynamique de l’écoulement sur une topographie complexe telle qu’un environnement urbain.
La première partie de la rédaction est consacrée à la description de la méthodologie d’évaluation du risque en commençant par la modélisation de l’aléa et ensuite l’évaluation de la vulnérabilité des biens et des personnes. L’échelle d’analyse de la procédure permet son développement en suivant la philosophie orientée objet : chaque élément soumis au risque étant ainsi considéré comme un objet distinct avec des propriétés et des caractéristiques définies.
Dans un second temps, l’applicabilité de la procédure est démontrée au moyen d'une étude de cas pour laquelle trois mesures de protection contre les inondations sont évaluées. L’analyse détaillée de ces mesures met en exergue des influences sensiblement différentes sur les courbes du risque d’inondation. [en] The paper presents a consistent micro-scale flood risk analysis procedure, relying on detailed 2D inundation modelling as well as on high resolution topographic and land use database. The flow model is based on the shallow-water equations, solved by means of a finite volume scheme on multiblock structured grids. Using highly accurate laser altimetry, the simulations are performed with a typical grid spacing of 2m, which is fine enough to represent the flow at the scale of individual buildings.
The methodology is first described, both in terms of hydraulic modelling and evaluation of people and assets vulnerability. The analysis scale of the procedure enables its development following an object-oriented approach. Finally, the applicability of the procedure is demonstrated through a case study for which three different protection measures are evaluated. Detailed analysis of these measures highlights significantly different influences from those measures on the risk curves.
Research Center/Unit :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Dewals, Benjamin ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Detrembleur, Sylvain ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Archambeau, Pierre ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien ; Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Ernst, Julien
Pirotton, Michel ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Language :
French
Title :
Caractérisation micro-échelle du risque d’inondation : modélisation hydraulique détaillée et quantification des impacts socio-économiques
Alternative titles :
[en] Micro-scale characterization of flood risk: detailed inundation modelling and evaluation of socio-economic impacts
Publication date :
2011
Journal title :
Houille Blanche
ISSN :
0018-6368
eISSN :
1958-5551
Publisher :
Société Hydrotechnique de France, Grenoble, France
scite shows how a scientific paper has been cited by providing the context of the citation, a classification describing whether it supports, mentions, or contrasts the cited claim, and a label indicating in which section the citation was made.
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