Restricted areas of the BREVENNE_TURDINE Flood Risk Prevention Plan (PPRN) — Rhône

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 hazard level, each area is subject to an enforceable settlement. The regulations generally distinguish three types of zones: • ‘Building prohibited areas’, known as ‘red areas’, where the hazard level is high and the general rule is the prohibition on construction; • ‘prescribed areas’, known as ‘blue zones’, where the hazard level is average and the projects are subject to requirements adapted to the type of issue; • areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, crafts, commercial or industrial could aggravate risks or cause new ones, subject to prohibitions or requirements (cf. Article L562-1 of the Environmental Code). The latter category applies only to natural RPPs. For PPRTs, the Environmental Code (L515-15 et seq.) defines the same principle of zoning for areas at risk. The instructions in the PPRT development guide add a gradation within the “red zones” and “blue zones”. All areas depicted on the zoning plan to which a regulation or prescription applies are included. Areas surveyed (within prescribed boundaries) where the hazard is non-existent or presumed zero and that are not regulated by the RPP are excluded from this class of objects.