Map Viewing Service (WMS) of the dataset: Regulated zone of the PPRN flooding by overflow of the median sector the Boutonne of the commune of Vervant en 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.

针对自然防护风险区域（PPRs），《环境法典》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采取措施避免风险加剧的区域。
依据危险等级的差异，每类区域均需遵循可强制执行的管控规则。相关法规通常将区域划分为以下三类：
1. 禁止建设区（又称“红色区域”）：该区域危险等级较高，基本原则为禁止一切建设活动；
2. 规划管控区（又称“蓝色区域”）：该区域危险等级中等，相关工程建设项目需遵循适配风险类型的管控要求；
3. 非直接风险暴露区域：该区域虽未直接暴露于风险，但各类建设工程、开发项目以及农业、林业、手工业、商业或工业类经营活动（含农场）可能加剧既有风险或引发新风险，因此需遵守相关禁令或管控要求（详见《环境法典》第L562-1条）。此类区域仅适用于自然防护风险区域（RPPs）。