Simple download service (Atom) of the dataset: PPRN — RPP Regulated Area Flood — Meurthe Valley and its tributaries

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PPR，《环境法典（Environmental Code）》于条款L562-1中划定两类区域：风险暴露区域，以及虽未直接面临风险，但可通过预先制定管控措施规避风险加剧的区域。

依据危险等级差异，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三类：
1. ‘建筑禁止区域’（又称‘红色区域’）：该区域危险等级偏高，通用规则为严禁任何建筑活动；
2. ‘合规管控区域’（又称‘蓝色区域’）：该区域危险等级为中等，相关工程建设项目需遵循适配问题类型的管控要求；
3. 虽未直接面临风险，但各类建筑、工程、开发项目或农业、林业、手工业、商业及工业领域的经营活动可能加剧既有风险或引发新风险的区域，需遵守相关禁止规定或管控要求（详见《环境法典》条款L562-1）。该类区域仅适用于自然RPP。