Map Viewing Service (WMS) of the dataset: AZI of Vaucluse (84) — Hydrogeomorphological Entities

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.

洪涝风险是法国本土最主要的自然风险。由于淹没区域内公共区域占比各不相同，近半数市镇均受到不同程度的洪涝影响。洪涝风险始终是各项重要防洪工作的核心议题，相关防控工作仍需持续推进。管控城市化进程、降低洪泛区民众的脆弱性，正是环境格勒纳尔会议的核心目标之一。降低洪泛区民众的脆弱性，需通过减少暴露风险人口（例如管控城市化）、提升风险认知（例如发布预防性信息），配套落实防护措施（例如堤防工程）与风险防控工作（例如洪涝风险防控规划）。在部分未纳入RIPs覆盖范围的区域，已编制完成洪泛区地图集（AZI）。洪泛区地图集（AZI）是一类知识文档，基于所谓的水文地貌学方法——即通过分析冲积平原结构，研究水道自然运行规律的地理学研究路径——划定水道的洪泛范围。此类地图集仅作为参考资料，不具备直接的法律效力。尽管如此，作为洪涝风险认知工具，洪泛区地图集（AZI）可作为驳回建筑许可申请的依据之一。