Simple download service (Atom) of the dataset: PPRN hazard zone flooding by overflow of the Charente River in the commune of Saintes en 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).

本数据集指用于RPP风险分析的灾害地图（hazard maps）上标注的、暴露于一种或多种危险的区域。
灾害地图系针对各类危险开展研究的成果，其核心目标是评估研究区域内任意点位的各类危险强度。针对不同危险类型，需采用专属评估方法，以此在研究范围内划定若干区域，形成按危险等级分级的分区。针对研究区域内指定点位的危险等级赋值，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，各分区通常会在灾害地图上通过其暴露的各类危险对应的编码进行标识。
所有在灾害地图上标注的危险区域均需纳入本数据集范畴。受防护结构保护的区域也必须予以标注（可采用专属方式），因为即便设有防护结构，此类区域仍存在受危险影响的可能，例如结构失效或防护能力不足的情况。
危险分区可被视为经过开发的数据集，其生成过程需整合多源计算、建模或观测得到的危险数据。此类源数据不属于本对象类的范畴，而是由另一项针对危险认知的标准进行规范。
研究区域内部分区域被划分为"无危险或危险可忽略区域"，即经研究确认危险程度为零的区域。此类区域不属于本对象类范畴，也无需作为危险分区进行标注。
但对于天然RPP，监管分区可能会将部分未暴露于危险的区域划定为规定区域（详见PPR类的定义）。