Departmental assembly of restricted areas of the Natural Risk Prevention Plans (PPRN) on the Hautes-Pyrénées

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).

This layer corresponds to the departmental assembly of approved PPRN zonings whose GIS version is validated to the national standard.

针对自然风险预防规划（PPR），《环境法典》第L562-1条将区划划分为两类：风险暴露区域，以及虽未直接面临风险但可预先采取措施以避免风险加剧的区域。
依据危险等级，每类区划均需遵循可强制执行的管控要求。相关法规通常将区划分为三类：
1. 禁止建设区（又称"红色区域"）：该区域危险等级较高，通用规则为禁止建设活动；
2. 限制建设区（又称"蓝色区域"）：该区域危险等级为中等，建设项目需遵循适配问题类型的管控要求；
3. 非直接风险暴露区：该区域虽未直接面临风险，但各类建设、工程、开发活动或农业、林业、手工业、商业及工业经营场所可能加剧既有风险或引发新风险，需遵守相关禁止性规定或管控要求（详见《环境法典》第L562-1条）。
该图层对应经核准的自然风险预防区划（PPRN）的省级汇总成果，其GIS版本已通过国家标准验证。