Map Viewing Service (WMS) of the dataset: PPRN flooding zone by overflow of the Charente River in the commune of Fontcouverte in Charente-Maritime

Area exposed to one or more hazards represented on the hazard maps used for risk analysis of the RPP. Hazard maps are the result of the study of hazards whose objective 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 multi-random PPRNs, each zone is usually identified on the hazard maps by a code for each hazard to which it is exposed. All hazard areas represented on the hazard maps 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. However, in the case of natural RPPs, regulatory zoning may classify certain areas not exposed to hazard as prescribing areas (see definition of the PPR class).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 maps）中，暴露于一种或多种标注灾害的区域。 灾害地图是灾害专项研究的产出成果，其核心目标为评估研究区域内任意点位的各类灾害强度。针对不同灾害类型，需采用专属评估方法，据此在研究边界范围内划定若干区域，形成按灾害等级梯度划分的区划体系。对研究区域内任一指定点位分配灾害等级时，需综合考量该危险现象的发生概率及其强度量级。 针对多随机PPRNs，灾害地图上的每个区域通常会通过其暴露的各类灾害对应的专属编码进行标识。 所有灾害地图上标注的灾害区域均需纳入本数据集。受防护结构保护的区域亦需标注（可采用专属方式），因为即便设有防护结构，此类区域仍面临灾害风险（例如结构发生破损或防护不足的情况）。 灾害区域可被视为经开发的数据集，其来源于对多源计算、建模或观测得到的灾害数据的综合整合。此类源数据不属于本对象类别的覆盖范畴，而是由另一项针对灾害认知的标准进行规范。 研究区域内的部分区域被划分为"无灾害或灾害可忽略区域"，即经专项研究确认灾害强度为零的区域。此类区域不属于本对象类别的覆盖范围，亦无需作为灾害区域进行标注。但对于天然RPP而言，监管区划可能将部分未受灾害影响的区域归类为规定区域（详见PPR类别的定义）。