DDT 91 — Areas of hazard of the Seine Flood Risk Prevention Plan (PPRI)

The Seine Flood Risk Prevention Plan (PPRI) was approved on 20 October 2003. 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 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.塞纳河洪水风险预防计划（PPRI）于2003年10月20日获批。 该灾害地图为灾害专项研究的成果，此项研究的目标为评估研究区域内任意点位的各类灾害强度。 在研究区域内的指定点位划定灾害等级时，需综合考量该灾害现象的发生概率及其强度等级。