Map visualisation service (WMS) of the dataset: Restricted zone of the PPRN flooding by overflow of the median sector Boutonne of the commune of the Churches of Argenteuil 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 may be foreseen to avoid exacerbating the risk. Depending on the hazard level, each area is subject to an enforceable settlement.Regulations generally distinguish three types of zones: 1- “Building Prohibition Zones”, so-called “Red Zones”, when the hazard level is strong and the general rule is the construction ban; 2- “prescription zones”, known as “blue zones”, where the hazard level is average and projects are subject to requirements adapted to the type of issue; 3- areas not directly exposed to risks but where constructions, structures, development or agricultural, forestry, artisanal, commercial or industrial activities could exacerbate 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 PPRs.针对自然PPR（natural PPRs），《环境法典》第L562-1条将其划分为两类区域：风险暴露区，以及未直接面临风险但需预先采取防控措施以避免风险加剧的区域。依据灾害等级，每类区域均需遵循可强制执行的管控规则。相关管控法规通常将区域划分为三类： 1. "建筑禁建区"，俗称"红色区域"：当灾害等级较高时，通用管控规则为禁止建设活动； 2. "规则管控区"，俗称"蓝色区域"：当灾害等级为中等时，建设项目需遵循适配问题类型的相关管控要求； 3. 未直接面临风险，但各类建设、构筑物、开发活动或农业、林业、手工业、商业及工业活动可能加剧既有风险或引发新风险的区域，此类区域需遵循相关禁止或管控要求（详见《环境法典》第L562-1条）。 上述第三类区域仅适用于自然PPR。