PPRN hazard zone — RHINS and Trambouze on the Rhône department

Area exposed to one or more hazards and represented on the hazard map produced in the development 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. For PPRTs the hazard levels are determined effect by effect on maps by type of effect and overall on an aggregated level on a synthesis map.暴露于一种或多种危险源，并被纳入RPP编制流程中生成的危险地图（hazard map）的区域。 危险地图是危险研究的成果，其研究目标为评估研究区域内任意点位的各类危险强度。针对不同危险类型，需采用专属的评估方法，最终可在研究范围内划定一系列区域，形成按危险等级分级的分区体系。 针对区域内特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场景，危险地图上的每个分区通常会通过其所暴露的各类危险对应的编码进行标识。 针对PPRTs场景，危险等级需按效应类型在单张效应地图上逐效应确定，并在综合地图（synthesis map）上以聚合层级进行整体评定。