Analyse cartographique de l'évolution de la vulnérabilité en zone urbaine face aux inondations dites remarquables

[Departement_IRSTEA]Eaux [TR1_IRSTEA]ARCEAU [Encadrant_IRSTEA]Boudou, M. ; Lang, M.

English. The directive 2007/60/EC of the European parliament requests the member states to focus on historical major risk through “a description of the floods which have occurred in the past and which have had significant adverse effects … “. The main aim of this internship was to develop a cartographic methodology to achieve a diachronic analysis of remarkable flooding vulnerability. The general issue could be: how to valuate historical information with cartographic based-methods for coverage assessment of territory’s vulnerability to flooding risk, on the basis of a constant historical hazard. This hazard, offering an important degree of remarkability, could see as flood event of exceptional scenario. This work was originally developed on the Doubs flooding on January 1910 in Besancon and then validate on the Tarn flooding on March 1930 in Moissac. Although this two events are both flood plain, they have enough divergence for validate this few methodological points.

French. L'utilisation de l'information historique pour la gestion des risques d'inondation est préconisée dans la Directive Inondation de 2007. Afin de mettre en lumière l'intérêt de cette information sur deux inondations exceptionnelles (janvier 1910 et mars 1930), une analyse cartographique de l'évolution de la vulnérabilité est proposée. L'objectif est ici de comprendre l'évolution des enjeux exposés dans deux villes fortement impactées lors de ces crues (Besançon et Moissac) et ce que cela implique pour la vulnérabilité de ces territoires face à l’occurrence de crues de même importance.