Regulatory zoning of the Marne River Flood Risk Prevention Plan — Épernay Sector — CAECPC

For natural PPRs, the Environmental Code defines two categories of zones (L562-1): risk-exposed areas and areas that are not directly exposed to risks but where measures can be foreseen to avoid exacerbating the risk. Depending on the level of hazard and the issues, each area is subject to an enforceable regulation that sets out, in a clear and operational manner, the regulatory measures that apply to each of the restricted areas. The Regulation generally distinguishes five types of zones: 1. “Building prohibited areas”, referred to as “red zone”, depending on the level of hazard in an area with little or no construction, or in an agricultural or natural area, then the general rule is the prohibition on construction; 2. “areas subject to requirements”, referred to as “magenta zone”, “medium blue zone” or “light blue zone”, depending on the level of hazard in an urbanised area, then the projects are subject to requirements adapted to the type of issue; 3. “white areas” not defined in the Regulation and for which the RPIP does not apply, as they are not subject to hazard. The identification of these homogeneous areas results in the development of a mapping of the regulatory zoning of the PPRi. The hazard, the stakes, which made it possible to construct this regulatory Zonage, as well as the reference ratings are located under the no. gaspar 51DDT20170001 Spatial resolution: 1/10 000 Genealogy: The boundaries of a restricted area are shown on the graphical documents of the RPP. Regulatory limits are generally set on natural phenomena, which do not follow cadastral or administrative boundaries. A RPP determines the boundaries of the different restricted areas based on the calculated right-of-way of the site’s hazardous events. Some RPPs may sometimes contain regulations associated with linear or point configurations (cavitates, runoff axis, etc.). Linear and point graphic primitives are to be used in these cases respectively.