Simple download service (Atom) of the dataset: PPRN hazard zone flooding by overflow of the Boutonne on the commune of Nouillers 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).

本类对象指用于RPP风险分析的灾害地图上标注的、受一种或多种灾害影响的区域。
灾害地图源于灾害专项研究，该研究的核心目标是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，评估方法各具针对性，由此可在研究范围内划定若干区域，形成按灾害等级分级的灾害区划。对区域内指定点位的灾害等级进行赋值时，需综合考量该危险现象的发生概率及其强度等级。

针对多随机PPRN，每个区域通常会通过其所涉对应灾害的专属编码在灾害地图上完成标识。
所有在灾害地图上标注的灾害区域均纳入本类对象范畴。设有防护结构的区域必须（可通过特定方式）予以标注，因为即便设有防护结构，该区域仍存在灾害风险（如结构破损或防护能力不足的情形）。
灾害区域可被视为衍生数据集，其生成过程需整合多源的计算、建模或观测所得的灾害数据。本类对象不涵盖此类源数据，相关源数据需遵循另一项针对灾害认知的专项标准进行管理。
研究区域内部分区域被划为无灾害或灾害影响可忽略区域（no or insignificant hazard zones），即经专项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，无需作为灾害区域进行标注。但对于天然RPP，监管区划可能将部分未受灾害影响的区域划为指定区域（详见PPR类别的定义）。