Simple download service (Atom) of the dataset: Natural Risk Prevention Plan (PPRN) hazard areas of Candresse — Landes (40)

Area exposed to one or more hazards represented on the hazard map used for risk analysis of the Risk Prevention Plan (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).

本类对象指用于风险预防计划（Risk Prevention Plan，RPP）风险分析的灾害地图（hazard map）上标注的、遭受一种或多种危险的区域。灾害地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。评估方法因危险类型各不相同，据此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。在研究区域内某一给定点位分配危险等级时，需综合考量危险现象的发生概率及其强度等级。
针对多随机风险预防计划（PPRN），灾害地图上的每个分区通常会通过其所暴露的每种危险对应的专属编码进行标识。本类包含灾害地图上标注的全部危险区域。防护结构保护的区域必须予以标注（可采用特定标注方式），因为即便设有防护结构，该区域仍可能面临危险（如结构破损或防护能力不足的情况）。危险分区可视为经整合加工的数据集：其来源于对计算、建模或观测所得的多源危险数据的综合分析。此类源数据不属于本类对象的范畴，而由另一项针对危险认知的标准规范进行管理。
研究区域内部分区域被归类为"无危险或危险可忽略区域"，即经专项研究确认危险程度为零的区域。此类区域不属于本类对象范畴，也无需作为危险分区进行标注。不过，针对自然风险预防计划（RPP），监管分区可能将部分未暴露于危险的区域划为规定区域（详见风险预防计划（PPR）类别的定义）。