Map Viewing Service (WMS) of the dataset: Regulated area of the PPRN flooding by overflow of the Charente River on the commune of Rouffiac in Charente-Maritime

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:
1- ‘Building prohibited areas’, known as ‘red areas’, where the hazard level is high and the general rule is the prohibition on construction;
2- ‘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;
3- areas not directly exposed to risks but where constructions, works, developments or farms, agricultural, forestry, craft, 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.

针对自然PPRs（natural PPRs），《环境法典》（Environmental Code）第L562-1条将其划分为两类区域：风险暴露区域，以及虽未直接面临风险但可预先采取措施避免风险加剧的区域。依据危险等级的不同，每类区域均需执行可强制执行的建设管控规则。相关管控法规通常将区域划分为三类：
1. 建筑禁建区（Building prohibited areas），俗称红色区域（red areas），此类区域危险等级较高，基本原则为禁止任何建设活动；
2. 指定管控区（prescribed areas），俗称蓝色区域（blue zones），此类区域危险等级中等，建设项目需根据问题类型适配相应管控要求；
3. 虽未直接暴露于风险之中，但各类建设、工程、开发活动，以及农业、林业、手工业、商业及工业业态可能加剧既有风险或引发新风险的区域，需遵守相关禁令或管控要求（参见《环境法典》第L562-1条）。该第三类区域仅适用于自然RPPs（natural RPPs）。