Linear Issues of the Loison-sub-Lens PPRN

Generally speaking, the stakes are people, property, activities, cultural or environmental heritage elements, threatened by a hazard and likely to be affected or damaged by it. The sensitivity of an issue to a hazard is called “vulnerability.”This object class brings together all the issues that have been addressed in the RPP study. An issue is a dated object whose consideration depends on the purpose of the RPP and its vulnerability to the hazards studied. A PPR issue can therefore be considered (or not) depending on the type or types of hazard being addressed. These elements form the basis of knowledge of the land cover necessary for the development of the RPP, in the study area or near it, at the time of the analysis of the issues. The data on the issues represent a photograph (figential and not exhaustive) of the property and of the people exposed to hazards at the time of the development of the risk prevention plan. This data is not updated after approval of the RPP. In practice they are no longer used: the issues are recalculated as necessary with up-to-date data sources.一般而言，承灾体（stakes）指受危害源（hazard）威胁、并可能遭受其影响或破坏的人员、财产、活动、文化或环境遗产要素。 某一评估对象针对危害源的敏感性，被定义为“易损性（vulnerability）”。 本对象类别涵盖了风险预防计划（RPP，Risk Prevention Plan）研究中涉及的全部评估对象。 评估对象是一类带有时间戳的对象，其是否被纳入考量取决于风险预防计划的目标，以及其针对所研究危害源的易损性。 因此，是否纳入某一RPP评估对象，取决于当前所针对的一种或多种危害源类型。 在开展评估对象分析时，上述要素构成了研究区域及其周边区域内，制定风险预防计划所需的土地覆盖相关知识库的基础。 此类评估对象数据，是风险预防计划制定之时，受危害源威胁的财产与人员状况的（具象且非穷尽的）快照。 该类数据在风险预防计划获批后不再更新。 实际应用中此类数据已不再被直接使用：评估对象可根据需求，结合最新数据源重新计算生成。