Hazard area of a PPRT on the department of the Meuse (55)

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 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. 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.本数据集涵盖用于RPP风险分析的危险分布图上标注的、受一种或多种危险影响的区域。 危险分布图是危险研究的成果，其核心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，需采用专属评估方法，最终在研究范围内划定若干区域，形成按危险等级分级的区划。针对某一特定区域的危险等级进行赋值时，需综合考量该危险现象的发生概率及其强度量级。 针对PPRT，危险等级需按效应类型在对应分布图上逐一确定，并在综合图中以聚合维度完成整体判定。 本数据集涵盖危险分布图上标注的全部危险区域。受防护结构保护的区域也必须予以标注（可采用特定标注方式），因为即便设有防护结构，该区域仍存在遭受危险影响的可能，例如结构发生破损或防护能力不足的情况。 危险区域可被视为衍生数据，其生成通过整合多源计算、建模或观测获取的危险数据完成。此类源数据不属于本对象类别的范畴，而是由另一项针对危险认知的标准进行规范。 研究区域内部分区域被划定为无危险或可忽略危险区域（"no or insignificant hazard zones"），即经研究确认危险等级为零的区域。此类区域不属于本对象类别，也无需作为危险区域进行标注。