Articles | Volume 15, issue 11
https://doi.org/10.5194/nhess-15-2497-2015
https://doi.org/10.5194/nhess-15-2497-2015
Research article
 | 
11 Nov 2015
Research article |  | 11 Nov 2015

Coastal flooding of urban areas by overtopping: dynamic modelling application to the Johanna storm (2008) in Gâvres (France)

S. Le Roy, R. Pedreros, C. André, F. Paris, S. Lecacheux, F. Marche, and C. Vinchon

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Cited articles

André, C.: Analyse des dommages liés aux submersions marines et évaluation des co\^uts induits aux habitations à partir de données d'assurance, perspectives apportées par les tempêtes Johanna (2008) et Xynthia (2010), PhD Thesis of the University of Western Brittany, Brest, 2013 (in French).
André, C., Monfort, D., Bouzit, M., and Vinchon, C.: Contribution of insurance data to cost assessment of coastal flood damage to residential buildings: insights gained from Johanna (2008) and Xynthia (2010) storm events, Nat. Hazards Earth Syst. Sci., 13, 2003–2012, https://doi.org/10.5194/nhess-13-2003-2013, 2013.
Ardhuin, F., Rogers, A., Babanin, A., Filipot, J. F., Magne, R., Roland, R., Westhuysen, A. V. D., Queffleulou, P., Lefevre, L., Aouf, L., and Collard, F.: Semi-empirical dissipation source functions for ocean waves: Part I, definition, calibration and validation. J. Phys. Oceanogr., 40, 1917–1941, 2010.
Bates, P. D., Horitt, M. S., and Fewtrell, T. J.: A simple inertial formulation of the shallow water equations for efficient two dimensional flood inundation modeling, J. Hydrol., 387, 33–45, 2010.
Bates, P. D. and De Roo, A. P. J.: A simple raster-based model for flood inundation simulation, J. Hydrol., 236, 54–77, 2000.
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Short summary
The proposed methodology aims to simultaneously simulate wave overtopping and the resulting flood in an urban area, with respect to chronology and buildings effect. Based on a downscaling approach, this method uses a time-dependent phase-resolving model to simulate dynamically the flows on a DEM including buildings. Applied to the Johanna storm in Gâvres (France), this method allowed for obtaining very realistic results in terms of water depths and flow velocities at a very high resolution.
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