Map Viewing Service (WMS) of the dataset: PPRN of Valserhône (territory of the former commune of Bellegarde-sur-Valserine)

For natural RPPs, the Environmental Code defines two categories of areas (L562-1): risk-prone areas and areas that are not directly exposed to risks but on which measures may be provided for avoid increasing the risk. Depending on the hazard level, each area is subject to a enforceable regulation. The regulations generally distinguish three types of zones: 1- “Building prohibited areas”, so-called “red zones”, when the level of D’aléa is strong and that the general rule is the prohibition on construction; 2- “areas” subject to requirements, referred to as ‘blue zones’, where the hazard level is average and that projects are subject to requirements adapted to the type of issue; 3- Areas not directly exposed to risks, but where constructions, works, development or agricultural, forestry, artisanal, commercial or industrials could aggravate risks or cause new, submitted prohibitions or prescriptions (cf. Article L562-1 of the Environmental Code). This last category applies only to natural RPPs.针对自然风险防护区域（RPPs），《环境法典》（Environmental Code）于条款L562-1中划定了两类区域：一类为易受风险影响区域，另一类为未直接暴露于风险之中，但可通过采取相关措施避免风险加剧的区域。依据危险性等级的不同，每类区域均需遵守强制性监管要求。监管规则通常将区域划分为三类： 1. “禁止建设区域”（亦称“红色区域”）：当危险性（d’aléa）等级较高时，建设活动一律被禁止； 2. “受监管约束区域”（亦称“蓝色区域”）：此类区域危险性等级为中等，建设项目需遵守适配风险类型的监管要求； 3. 非直接暴露于风险的区域：此类区域内的建设工程、开发活动或农业、林业、手工业、商业及工业活动可能加剧风险或引发新的风险，因此需遵守相关禁止性规定或监管要求（详见《环境法典》第L562-1条）。该最后一类区域仅适用于自然风险防护区域。