Hazard zone of the PPRi MADON AVAL

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 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 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 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).本类对象对应用于RPP风险分析所采用的灾害地图（hazard map）上标注的、受一种或多种灾害影响的区域。 灾害地图（hazard map）系灾害研究的成果，其研究目标为评估研究区域内任意点位的各类灾害强度。评估方法因灾害类型而异，可划定研究范围内的多个区域，形成按灾害等级分级的分区。对区域内任意点位的灾害等级进行赋值，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场景，灾害地图上的每个分区通常会通过其所受灾害对应的编码进行标识。本类对象包含灾害地图上标注的所有灾害影响区域。受防护结构保护的区域必须予以标注（可采用特定方式），因为这类区域始终被视为处于灾害风险之中（例如结构失效或防护不足的情况）。 灾害分区可被视为经加工整合的数据，其生成过程综合了多种来源的计算、建模或观测得到的灾害数据。此类源数据不属于本类对象的范畴，而是由另一项针对灾害认知的标准进行规范。 研究区域内部分区域被划分为“无灾害或灾害可忽略区域”，即经研究确认灾害强度为零的区域。此类区域不属于本类对象范畴，也无需作为灾害分区进行标注。但在天然RPP场景中，监管分区可将未受灾害影响的区域归类为规定区域（详见PPR类的定义）。