Simple download service (Atom) of the dataset: PPRN flooding zone by overflow of the Boutonne in the commune of Torxé 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).

用于RPP风险分析的灾害地图（hazard map）中所表征的、受一种或多种灾害（hazard）影响的区域。灾害地图是灾害研究的产物，其研究目标为评估研究区域内任意点位的各类灾害强度水平。该评估方法因灾害类型而异，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（zoning）。为研究区域内某一指定点位确定灾害等级时，需综合考量危险现象的发生概率及其强度等级。
针对多随机PPRNs，通常会通过对应各灾害的专属编码，在灾害地图上标识出其所在的受影响区域。
所有灾害地图中表征的灾害区域均需纳入统计范围。受防护结构保护的区域也必须（可采用特定表征方式）进行标注，因为即便防护结构发生破损或效能不足，该区域仍会处于灾害威胁之中。
灾害区域可被描述为经加工的数据集，前提是其由多源计算、建模或观测得到的灾害数据综合生成。此类源数据不属于本对象类别的范畴，而是归属于另一项涉及灾害认知的标准规范。
研究区域内的部分区域被归类为"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。此类区域无需纳入本对象类别，也不必作为灾害区域进行表征。不过，对于天然RPPs，监管分区可能会将部分未受灾害影响的区域划定为规定区域（详见PPR类别的定义）。