France – Geology, oceanography and hydrology services – Cartographie de l’aléa inondation par débordement de l’Yvette amont et de ses affluents dans le département des Yvelines et de l’Essonne

The purpose of the study is to provide the Yvelines (DDT78) and Essonne (DDT91) departments with the technical elements and maps relating to the qualification of risks associated with the overflowing of the Yvette and its tributaries as part of the development of a flood prevention plan for the Yvette river basin (watercourses concerned: Yvette and Yvelines tributaries). This study is carried out in close collaboration with the Île-de-France regional and interdepartmental directorate for the environment, planning and transport (DRIEAT) and local stakeholders in the management of watercourses and flood risk prevention, particularly the intermunicipal syndicate for the hydraulic management of the Yvette valley (SIAHVY).