Hazard zone of the PPRN flooding by overflow of the Seugne and movement of terrain of the municipality of Jonzac in Charente-Maritime.

Area exposed to one or more hazards represented on the hazard maps used for the risk analysis of the RPP.
Hazard maps are the result of the study of hazards, the objective of which is to assess the intensity of each hazard at any point in the study area. The assessment method is specific to each type of hazard. It leads to the delimitation of a set of zones on the study perimeter constituting a graduated zoning according to the level of the hazard. The assignment 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 shown on the hazard maps are included. Areas protected by protective works must be represented (possibly in a specific way) because they are always considered subject to hazard (case of rupture or insufficiency of the structure).
Hazard zones can be described as elaborated data to the extent that they result from a synthesis using several calculated, modelled or observed hazard data sources. These source data are not concerned by this class of objects but by another standard dealing with the knowledge of hazards.
Some areas of the study perimeter are considered “zero or insignificant hazard areas”. These are the areas where the hazard has been studied and is zero. 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 PPRs, regulatory zoning may classify certain areas not exposed to hazard as a prescribing zone (see definition of ZonePPR class).

本类涵盖用于RPP风险分析的灾害地图（hazard map）上标注的、受一种或多种灾害影响的区域。
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。不同类型的灾害对应专属的评估方法，据此可在研究范围内划定一系列区域，形成基于灾害等级的分级分区。对研究区域内特定点位的灾害等级赋值时，需综合考量该危险现象的发生概率及其强度等级。

对于多随机PPRNs而言，每个区域通常会在灾害地图上通过其受影响的各类灾害对应的代码进行标识。

所有灾害地图上标注的灾害区域均需纳入本类。由防护工程保护的区域也必须进行标注（可采用特定方式），因为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功能失效的情况）。

灾害区域可被视为精细化数据，其生成基于对多源灾害数据的整合，这些数据来源包括计算所得、建模生成或实地观测的灾害数据。本类对象不涵盖此类源数据，相关源数据应由另一项针对灾害认知的标准进行规范。

研究范围内部分区域被视为“零灾害或微灾害区域”，即经研究确认灾害等级为零的区域。此类区域无需纳入本类对象，也无需作为灾害区域进行标注。

不过对于天然PPR而言，监管分区可能会将部分未受灾害影响的区域归类为规定区域（详见ZonePPR类的定义）。