Dataset Direct Download Service (WFS): PPRN hazard zone flooding by overflow of the Charente river of the commune of Chérac

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).本类对象指代用于反应堆保护计划（RPP）风险分析的灾害地图上所标注的、暴露于一种或多种灾害的区域。 灾害地图是灾害研究的成果，该研究的目标是评估研究区域内任意点位的各类灾害强度。评估方法因灾害类型而异，最终会在研究范围内划定若干区域，形成按灾害等级分级的分区。针对辖区内特定点位的灾害等级赋值，需综合考量该危险现象的发生概率与强度等级。 对于多随机PPRNs而言，灾害地图上的每个分区通常会通过其暴露的各类灾害对应的编码进行标识。 所有灾害地图上标注的灾害影响区域均纳入本类范畴。即便区域设有防护结构，也必须（可采用特定方式）予以标注——因为防护结构可能发生破损或失效，该区域仍会被视为处于灾害威胁之下。 灾害分区可被视为经开发的数据集，其依托多源计算、建模或观测得到的灾害数据综合生成。本类对象不涵盖这些源数据，相关源数据由另一项针对灾害认知的标准进行规范。 研究区域内部分区域被划为"无灾害或灾害可忽略区域"，即经研究确认无灾害风险的区域。此类区域不属于本类对象范畴，无需作为灾害分区进行标注。不过对于天然RPP而言，监管分区可能将部分未受灾害影响的区域划定为规定区域（详见PPR类的定义）。