Water Distribution Area (WRA) in the Great East

A Water Distribution Area (WRA) is an area comprising basins, sub-basins, aquifer systems or fractions thereof characterised by a lack of resources, other than exceptional, in relation to the needs. The ERAs are defined by Article R211-71 of the Environmental Code and are fixed by the Basin Coordinating Prefect by a decree, the list of municipalities included in a water distribution area (ZRE_BH/SA) is established by prefectural decree published in the Prefecture’s administrative acts (Article R211-72), here referred to as ZRE at the municipal boundaries within a department. As a result, there are two layers of ZRE: — a layer at river basin boundaries/aquifer system — a layer with communal boundaries within a department ZRE with boundaries of river basin/aquifer system (ZRE_BH/SA). The decree issued by the department prefects concerned translates the ZRE into a list of municipalities. This decree is the founding regulatory text of the ERA. In an ERA, the thresholds for authorisation and reporting of samples from surface water and groundwater are lowered. These provisions are intended to enable better control of the demand for water, in order to ensure the best preservation of aquatic ecosystems and the reconciliation of economic uses of water. In one ERA, water withdrawals greater than 8 m³/h are subject to authorisation and all others are subject to reporting.配水区（Water Distribution Area, WRA）是指由流域、子流域、含水层系统或其组成部分构成的区域，其核心特征为：除极端情形外，区域内水资源总量无法匹配用水需求。 用水管制区（Environmental Restriction Area, ERA）由《环境法典》第R211-71条定义，由流域协调省长通过政令划定。配水区（ZRE_BH/SA）所包含的市镇清单，由省长通过发布在省行政公报中的政令确立，依据为《环境法典》第R211-72条；此类在省域范围内以市镇边界为划分依据的配水区，简称ZRE。 由此，ZRE存在两个层级： — 以流域/含水层系统为边界的ZRE层级 — 以省域内市镇边界为划分依据的ZRE层级，即流域/含水层系统边界配水区（ZRE_BH/SA）。 相关省省长发布的政令将ZRE具象化为具体的市镇名录。 该政令为用水管制区（ERA）的法定设立依据。 在用水管制区（ERA）内，地表水与地下水取水采样的许可及报备阈值均有所下调。此类条款旨在强化用水需求管控，以实现水生生态系统的最优保护，并协调水资源的经济开发利用。在某一用水管制区内，取水量超过8立方米/小时的取水行为需获得行政许可，其余取水行为仅需履行报备义务。