Hazard zone of PPRT APERAM STAINLESS FRANCE in Isbergues

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 PPRTs the hazard levels are determined by effect effect on maps by type of effect and overall on an aggregated level on a synthesis map.All hazard areas represented 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.本数据集对应用于RPP风险分析的灾害地图（hazard map）中，标注有一类或多类灾害的受影响区域。灾害地图为灾害专项研究的成果，其核心目标为评估研究区域内任意点位各类灾害的强度。评估方法因灾害类型而异，可在研究范围内划定若干区域，形成按灾害等级分级的分区方案。针对区域内指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。针对PPRT，灾害等级按影响效应确定，按效应类型分类绘制地图，并在综合地图上以聚合层级进行整体标注。灾害地图上标注的所有灾害影响区域均需纳入本数据集。受防护结构保护的区域亦需标注（可采用特殊标注方式），因为即便设有防护结构，仍存在结构破损或失效的可能，此类区域仍被视为受灾害影响。灾害区域可按经整合的数据进行分类，此类整合数据基于计算、建模或观测得到的多源灾害数据合成。本对象类不涵盖这些源数据，相关内容由另一项针对灾害认知的标准规范。研究范围内的部分区域被视为“零灾害或可忽略灾害区域”，即经专项研究确认无灾害影响的区域。此类区域无需纳入本对象类，亦无需作为灾害影响区域进行标注。