PPRI Epte (Area area)

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the RPP. The hazard map is 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 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 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 map by a code for each hazard to which it is exposed. All hazard areas shown on the hazard map are included. Areas protected by protective structures must be represented (possibly in a specific way) as they are always considered to be subject to hazard (cases of breakage or inadequacy of the structure).The hazard zones may be classified as data compiled in so far as they result from a synthesis using several sources of calculated, modelled or observed hazard data. These source data are not covered 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 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 PPRs, regulatory zoning may classify certain areas not exposed to hazard as a prescribing area (see the definition of the class “ZonePPR”).本类对应用于RPP风险分析的灾害地图（hazard map）中标注的、受一种或多种灾害影响的区域。该灾害地图源于灾害专项研究，其核心目标为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，需采用专属评估方法，据此在研究范围内划定若干区域，形成按灾害等级分级的区划方案。针对研究区域内任意给定点位的灾害等级赋值，需综合考量该危险现象的发生概率及其强度水平。针对多随机PPRN（multi-random PPRNs）场景，灾害地图上的每个区域通常会通过其受影响的各类灾害对应的专属编码进行标识。本类涵盖灾害地图上标注的全部灾害影响区域。受防护结构保护的区域需予以标注（可采用专属标注方式），因为即便设置了防护结构，仍存在结构失效或防护不足而遭受灾害影响的可能。当灾害区域数据源于多源计算、建模或观测所得灾害数据的综合分析时，可将其归类为经汇总编制的数据。此类源数据不属于本对象类范畴，而是由另一项针对灾害认知的标准规范进行管理。研究范围内的部分区域被视为“零灾害或微灾害区域”，即经专项研究确认无灾害影响的区域。此类区域不属于本对象类范畴，无需作为灾害区域进行标注。但针对天然PPR（natural PPRs）场景，监管区划可能将未受灾害影响的特定区域划定为管控区域（详见“ZonePPR”类的定义）。