Regulatory zoning of the Flood Risk Prevention Plan (PPRI) of Golo, Asco and Tartagine in Upper Corsica

Plans for the prevention of natural hazards were established by the Act of 2 February 1995 on strengthening the protection of the environment. They are the key instrument of the State in the field of risk prevention. Their objective is to monitor the development of urban planning and land use in areas at risk. 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. This PPRI concerns the Golo, Asco and Tartagine watersheds.1995年2月2日颁布的《加强环境保护法》确立了自然灾害防治规划体系，该体系是国家开展风险防控工作的核心工具，其目标为对风险区域内的城市规划编制与土地利用开发活动进行全程监测。 针对自然风险防护规划（RPPs），《环境法典》将相关区域划分为两类（L562-1条款）：一是风险暴露区域，二是虽未直接面临风险但可通过采取措施避免风险加剧的区域。 依据灾害等级差异，各区域均需遵循可强制执行的开发管控细则。相关法规通常将区域划分为以下三类： 1. 禁止建设区（红色区域）：此类区域灾害等级较高，基本原则为全面禁止建设活动； 2. 规划管控区（蓝色区域）：此类区域灾害等级中等，建设项目需适配对应问题类型的专项管控要求； 3. 非直接风险暴露区域：该区域内的各类建设、工程、开发项目或农业、林业、手工业、商业及工业经营活动，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》L562-1条款）。该类区域仅适用于自然风险防护规划（RPPs）。 本次风险防护规划索引（PPRI）涉及戈洛河、阿斯科河与塔尔塔吉涅河流域。