Simple download service (Atom) of the dataset: PPRI Loire downstream in the Nantes agglomeration: Reference flood rating not altimeter 5 cm, in Loire-Atlantique

The Flood Risk Prevention Plan (PPRI) of the Loire downstream in the Nantes agglomeration replaces the PSS (Plan des Surfaces Submersibles) of the Loire Valley delimited by decree of 6 November 1958. Its purpose is to regulate land use (planning, construction and management rules) in the flood zone envelope modelled on the scenario of a 100-year flood (each year, one per cent chance for this type of flood to occur). The layer L_PPRI_LOIREAV_ISOC5CM_L_044.TAB presents the NGF-IGN69 level reached by the Loire for this reference centennial flood. The values are given by step of 5 cm on the Loire section between Nantes-St-Sébastien and Couëron-Le Pellerin.