Map Viewing Service (WMS) of the dataset: PPRN flooding zone by direct overflow of the Charente river of the commune of Bussac-sur-Charente 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).本类指用于RPP（RPP）风险分析的灾害地图（hazard maps）上标注的、受一种或多种灾害影响的区域。 灾害地图（hazard maps）是灾害研究的成果，该研究旨在评估研究区域内任意点位的各类灾害强度。 不同灾害类型对应专属的评估方法。 该方法可划定研究范围边界内的若干区域，形成按灾害等级分级的分区体系。 针对研究区域内指定点位的灾害等级赋值时，需同时考量危险现象的发生概率及其强度等级。 对于多随机PPRNs，各分区通常会在灾害地图（hazard maps）上以代码标注其所受的灾害类型。 所有在灾害地图（hazard maps）上标注的灾害区域均需纳入本类范畴。受防护结构保护的区域也必须予以标注（可通过特定方式实现），因此类区域始终被视为存在灾害风险（例如防护结构发生破损或失效的情形）。 灾害分区可视为整合多源计算、建模或观测所得灾害数据的加工数据集。 此类源数据不属于本对象类的管控范畴，而是由另一项涉及灾害认知的标准进行规范。 研究区域内部分区域被划定为"无灾害或灾害可忽略区域"，即经研究确认无灾害发生的区域。此类区域不属于本对象类范畴，亦无需作为灾害分区（hazard zones）进行标注。 但对于天然RPP（RPP）而言，监管分区可将部分未受灾害影响的区域划定为规定管控区域（详见PPR类（PPR class）的定义）。