Restricted zone of the flood prevention plan (PPRI) of the river “La Vienne” downstream, Antran sector in Port-de-Pile

For natural PPRs, the environmental code defines two categories of zones (L562-1): areas exposed to risk and areas that are not directly exposed to risks but where measures may be planned to avoid aggravating the risk. Depending on the hazard level, each area is subject to an enforceable settlement. The downstream Vienna PRIP has two regulatory areas: — red zone, — blue zone.