Data batch direct download service (WFS): Centennial flood of Orconté — Orconte sector in Frignicourt

Area exposed to one or more hazards represented on the hazard map used for flood risk analysis. The hazard map is the result of hydraulic modelling carried out in 2018 by the hydratec design office, whose objective was to assess the intensity of the hazard at any point in the study area. The assessment method led to the delimitation of a set of areas on the study perimeter, constituting a graduated zoning based on the level of water heights 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 (the centennial flood) and the natural terrain of the area. All hazard areas shown on the hazard map are included. Areas protected by protective structures are represented (possibly in a specific way) because they are always considered subject to hazard (case of breakage or inadequacy of the structure), here we speak of hydraulic transparency. 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 of the study area are considered “zero, insignificant or white 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.用于洪水风险分析的灾害地图上所标注的、受一种或多种灾害影响的区域。该灾害地图由Hydratec设计事务所于2018年通过水力建模生成，其目标为评估研究区域内任意点位的灾害强度。本次评估方法在研究范围内划定了若干区域，基于灾害水位高度等级形成分级分区。针对区域内特定点位的灾害等级赋值，需综合考量该危险现象（即百年一遇洪水）的发生概率与区域自然地形条件。灾害地图上标注的所有灾害影响区域均纳入本类范畴。受防护结构保护的区域亦会被标注（可采用特定标注方式），因为即便设有防护结构，仍需考虑结构破损或防护不足的风险，此即所谓水力透明度（hydraulic transparency）。本类灾害区域可视为经开发的数据集，其源自对多源计算、建模或观测所得灾害数据的综合整合。此类源数据不属于本对象类范畴，而是由另一项针对灾害认知的标准所覆盖。研究区域内部分区域被划分为“零灾害、无影响或空白区域”，即经评估灾害程度为零的区域。此类区域不属于本对象类范畴，亦无需作为灾害影响区域进行标注。