Map Viewing Service (WMS) of the dataset: Regulated area of the PPRN flooding by overflow of the Charente River in the commune of Salignac-sur-Charente 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.

针对自然风险预防规划（Natural Preventive Risk Plans，PPRs），《环境法典》第L562-1条将区域划分为两类：风险暴露区域，以及未直接面临风险但可通过制定相关措施避免风险加剧的区域。根据危险等级的不同，每类区域均需遵守可强制执行的管控规则。相关法规通常将区域进一步划分为三类：
1. “禁止建设区（又称‘红色区域’）”：该区域危险等级较高，原则上禁止任何建设行为；
2. “管控建设区（又称‘蓝色区域’）”：该区域危险等级中等，建设项目需遵守针对具体风险类型制定的适配性要求；
3. 非直接风险暴露区域：该区域虽未直接面临风险，但各类建设工程、作业项目、开发活动或农业、林业、手工业、商业及工业经营场所等行为可能加剧既有风险或引发新的风险，需遵守相关禁止性规定或管控要求（参见《环境法典》第L562-1条）。
该类区域仅适用于自然RPPs。