Flood Zone — Validated Atlas — in Provence Alpes Côte d’Azur

The risk of flooding is the predominant natural risk in metropolitan France. Almost half of the municipalities are affected to varying degrees by flooding, as the share of communal areas in flooding areas varies. The risk of flooding is the subject of significant prevention efforts that need to be continued. Controlling urbanisation and reducing the vulnerability of populations in flood zones are among the objectives of the Grenelle of the Environment. Reducing the vulnerability of people in flood zones requires protective measures (e.g.: dikes) and prevention (example: flood risk prevention plans), by reducing the number of people exposed (example: control of urbanisation) and awareness of risk (e.g. preventive information). In some areas, not covered by RIPs, flood zone atlases (AZI) have been established. The AZI is a knowledge document that delimits the flood field of a watercourse on the basis of a so-called hydrogeomorphological method (a geographical approach that studies the natural functioning of a watercourse by analysing the structure of the alluvial plain). These atlases are information material with no direct regulatory scope. Nevertheless, as a flood risk knowledge tool, an AZI can support a refusal of building permits. List of flood risk municipalities classified by river. A municipality may be affected by 3 rivers with flood risk. It may be affected by one or more flood zones and one or more PPRIs, depending on the rivers crossing it. A municipality affected by a PPRI for a river, exits AZI as part of that river.法国本土（metropolitan France）的洪涝风险是最主要的自然风险。近半数市镇（municipalities）因辖区公共区域在洪涝易发区（flooding areas）中的占比存在差异，因而受到不同程度的洪涝影响。洪涝风险是一项需要持续推进的重点防治工作。管控城市扩张、降低洪涝高风险区域内民众的脆弱性，是环境格勒纳尔会议（Grenelle of the Environment）的目标之一。降低洪涝高风险区域内民众的脆弱性，需兼顾防护措施与预防工作：前者例如堤坝，后者例如洪水风险预防计划（PPRI）；具体手段包括减少暴露于洪涝风险中的人口数量（例如管控城市扩张）以及提升民众的风险防范意识（例如预防性宣传）。在部分未被RIPs覆盖的区域，已设立洪水区地图集（AZI）。洪水区地图集（AZI）是一份知识型文档，通过所谓的水文地貌学方法（hydrogeomorphological method）——即通过分析冲积平原（alluvial plain）结构，研究河道自然运行规律的地理学研究路径——划定河道的洪涝影响范围。此类地图集仅为参考资料，不具备直接的法律效力。尽管如此，作为洪涝风险认知工具，洪水区地图集（AZI）可用于驳回建筑许可（building permits）申请。 本数据集包含按河流分类的洪涝风险市镇列表。单个市镇可能受到3条存在洪涝风险的河道影响；根据穿境河道的不同，该市镇可能涉及一处或多处洪涝易发区，以及一处或多处洪水风险预防计划（PPRI）。若某市镇因某条河道被纳入洪水风险预防计划（PPRI）覆盖范围，则该市镇将作为该河道相关洪水区地图集（AZI）的组成部分予以收录。