Restricted areas of the Flood Risk Prevention Plan of LOIRE AVAL VILLEREST NORD (Briennon, Pouilly-s-Charlieu, St-Nizier-s-Charlieu, St-Pierre-la-Noaille) — Loire

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, including a spatial dataset of the 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 the hazards to which it is exposed; — issues which are persons, property, activities and elements of cultural or environmental heritage threatened by a hazard and likely to be affected or damaged by it; — origins of risk, i.e. the entity of the real world 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. Each element in the same PPRN dataset is bound by the GASPAR format identifier “ddd[PREF|DDT|DDTM|DREAL]aaaannnn” (AAAA and NNNN correspond to the reference year and the order number of the PPR procedure associated in GASPAR) to a single object.风险预防计划（Risk Prevention Plans, RPPs）是政府开展风险防控的核心工具，其核心目标为管控风险区域内的开发活动。 风险预防计划的编制会生成一套经分类组织的空间数据集，其中包含获批后的计划限制区域空间数据集。RPP相关监管规定通常会区分三类管控区域：“禁止建设区”（construction ban areas，即所谓“红色区域”（red areas）），该区域灾害等级较高，原则上实施建设禁令；“合规管控区”（areas subject to requirements，又称“蓝色区域”（blue zones）），这类区域灾害等级为中等，相关项目需结合问题类型与区域特点落实适配性管控要求；此外还有一类区域虽未直接暴露于风险之中，但仍需遵守相关禁令或管控规定。 — 灾害区域（hazard areas）：指用于风险分析的灾害地图上标注的区域，需结合承灾体开展空间叠加分析，并明确标注每个区域所面临的灾害等级； — 承灾要素：即受灾害威胁、可能因灾害遭受影响或破坏的人员、财产、活动以及文化或环境遗产要素； — 风险源（origins of risk）：即现实世界中因其存在而构成潜在风险的实体。该实体可通过名称、外部对象引用或用于定位实际致险实体的地理对象进行表征。 同一PPRN数据集中的每个要素均通过GASPAR格式标识符"ddd[PREF|DDT|DDTM|DREAL]aaaannnn"（其中AAAA与NNNN分别对应GASPAR系统中关联的风险预防计划程序的参考年份与序号）绑定至单个对象。