Simple download service (Atom) of the dataset: Zone d’aléa du PPRT of the establishment RHODIA in the municipality of La Rochelle, in Charente-Maritime

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP. The hazard map is the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The evaluation method is specific to each hazard type. It leads to the delimitation of a set of areas on the study perimeter constituting a zoning graduated according to the level of the hazard. The allocation of a hazard level at a given point in the territory takes into account the probability of occurrence of the dangerous phenomenon and its degree of intensity. For PPRTs the hazard levels are determined effect by effect on maps by type of effect and overall on an aggregated level on a synthesis map. All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered subject to hazard (case of breakage or inadequacy of the structure). Hazard zones can be described as developed data to the extent that they result from a synthesis using multiple sources of calculated, modelled or observed hazard data. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards. Some areas within the study area are considered “no or insignificant hazard zones”. These are the areas where the hazard has been studied and is nil. These areas are not included in the object class and do not have to be represented as hazard zones.本数据集指代用于反应堆保护计划（RPP）风险分析的灾害地图（hazard map）中所标注的、暴露于一种或多种灾害的区域。 灾害地图源自灾害专项研究，其核心目标是评估研究区域内任意点位的各类灾害强度。评估方法随灾害类型的不同而存在差异，最终将在研究范围内划定一系列区域，形成按灾害等级分级的分区方案。对区域内特定点位进行灾害等级赋值时，需综合考量该危险现象的发生概率及其强度等级。 针对PPRT，灾害等级将按效应类型在对应地图上逐一定义，并在综合地图（synthesis map）上以聚合层级完成整体评定。 灾害地图中展示的所有灾害区域均需纳入本类对象范畴。受防护结构保护的区域亦须（可采用特定标注方式）予以呈现，因为此类区域始终被视为处于灾害风险之中（例如结构发生破损或失效的情形）。 灾害分区可归类为开发完善的数据集，其生成过程需整合多源的计算、建模或观测所得的灾害数据。本类对象不涵盖此类源数据，相关源数据的规范由另一项面向灾害认知的标准负责。 研究区域内的部分区域被划为“无灾害或灾害可忽略区域”，即经研究确认灾害风险为零的区域。此类区域不属于本类对象范畴，亦无需作为灾害分区进行标注。