Enseignements tirés de diagnostics d'inondabilité sur sinistres

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The methodology used for auditing flooded areas in South western France, for insurance or legal purposes, consists in examining the spatial coherency and occurrence between rainfall - discharge - flood submersion, in order to define an hydraulic scheme of the site after a critical event. We use for that any available data, generally scarce. On the basis of typical disasters, from single submersion to torrential flood, we observe the impact of urbanisation & rural planning for sites generally sensitives. So, for such exposed areas either local communities or industrial plants, and for insurance or security purposes, a preventive hydro audit is recommanded.