Map Viewing Service (WMS) of the dataset: Prevention plan for natural risks “floods” of the Seine in the department of Seine-Saint-Denis — Regulatory area

Risk Prevention Plans (RPPs) are the key government instrument for risk prevention. Their objective is to control development in areas at risk. The development of a risk prevention plan generates a set of spatial data organised into several data sets. The same PPR may include spatial datasets containing: • main PPR encompassing perimeters (study perimeter, prescription perimeter, regulated scope); • restricted areas of the plan once approved. RPP regulations generally distinguish between ‘construction ban areas’, so-called ‘red areas’, where the hazard level is high and where the general rule is the construction ban; ‘areas subject to requirements’, known as ‘blue zones’ where the hazard level is medium and projects are subject to requirements adapted to the type of issue and areas not directly exposed to risks but subject to prohibitions or prescriptions; • hazard areas represented on the map of hazards used for risk analysis by crossing with the stakes, specifying for each zone the level of hazards to which it is exposed; • stakes (persons, property, activities, cultural or environmental heritage elements) threatened by a hazard and likely to be affected or damaged by it; • origins of risk, i.e. the real-world entity which, through its presence, represents a potential risk. This entity may be characterised by a name, a reference to an external object or a geographical object that locates the actual entity causing the risk.风险预防计划（Risk Prevention Plans, RPPs）是政府开展风险防控的核心官方工具，其核心目标为管控风险区域内的开发活动。编制风险预防计划会生成一系列空间数据，并整合为多个数据集。同一份RPP可包含以下几类空间数据集： • 核心RPP覆盖范围（含研究范围、法定适用范围、监管范围）； • 计划获批后的管控区域。RPP管控规则通常将管控区域划分为两类：其一为“禁建区”，即俗称“红色区域”，该区域风险等级较高，通用规则为禁止建设；其二为“约束建设区”，即俗称“蓝色区域”，涵盖风险等级中等、建设项目需根据问题类型适配管控要求的区域，以及未直接暴露于风险但仍需遵守禁令或法定要求的区域； • 风险分析专用危险源（hazard）分布图上标注的风险影响区域，此类区域通过与承险体开展空间叠加分析生成，并需明确各区域所暴露的风险等级； • 承险体（stakes）：指受危险源威胁、可能遭其影响或损害的人员、财产、生产活动、文化或环境遗产要素； • 风险源（origins of risk）：即因实际存在而构成潜在风险的现实实体。该实体可通过名称、外部对象引用或用于定位风险实际成因的地理对象进行标识。