Spatialisation des zones baties potentiellement exposées a l’aléa “crues rapides”dans le nord de la France: enjeux etperspectives

摘要

The aim of this study is to propose preventive maps to provide better information on the flash floods occurring on the loamy plains of northern France (Paris Basin). Classically-named muddy floods in such areas, these events are significant as they cause important damage on buildings and infrastructures and can cause loss of life. Few studies have focused on these hazards because they affect small-size basins, without highly urbanised areas, and rarely occur in the same areas. Preventive maps based on the main morphometrics characteristics detected on 189 affected basins over the period 1983-2005 and on the spatial distribution of built terrain were determined from the regional to local scales. First results give relevant information as these maps confirm our knowledge on local events, as well as the experience of local experts and the flooded population.