Map Viewing Service (WMS) of the data batch: Atlas of flood zones (AZI) — Vaucluse (84) — Lot sheet

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.洪水风险是法国本土最主要的自然风险。由于处于洪涝风险区域内的市镇辖区占比存在差异，法国近半数市镇均受到不同程度的洪涝影响。洪涝风险是当前重点防控工作的核心议题，相关防控举措仍需持续推进。控制城市化进程、降低洪涝风险区内人口的脆弱性，正是环境格勒奈尔会议（Grenelle of the Environment）的核心目标之一。降低洪涝风险区内人口的脆弱性，需通过防护措施（例如堤坝）与风险防控工作（例如洪涝风险防控规划）两类路径实现，具体手段包括减少受风险影响的人口数量（例如管控城市化进程）以及提升公众的风险认知水平（例如开展预防性风险宣传）。在部分未纳入洪涝风险防控计划（RIPs）覆盖范围的区域，已编制完成洪涝风险区图集（AZI）。洪涝风险区图集是一类知识性文档，它基于所谓的水文地貌学方法划定河道的洪涝影响范围——该方法属于地理学研究路径，通过分析冲积平原的结构来探究河道的自然运行规律。此类图集仅为参考资料，不具备直接的法律效力。但作为洪涝风险认知工具，洪涝风险区图集可作为否决建筑许可申请的依据之一。