Map Viewing Service (WMS) of the dataset: Municipalities in the broad sense (communities or cadastral sections of municipalities) in ‘vulnerable zone’ in the Grand-East in the territory of the Rhine-Meuse Water Agency

Vulnerable areas are land designated in accordance with European Directive No. 91-676. A vulnerable area is a part of the territory where water pollution by direct or indirect discharge of nitrates of agricultural origin or other nitrogen compounds that may become nitrates threatens in the short term the quality of aquatic environments and, in particular, the supply of drinking water. Vulnerable areas shall be considered as vulnerable areas where: — Groundwater and surface fresh water, in particular those used or intended for water abstraction for human consumption, with a nitrate content exceeding 50 milligrams per litre, — The waters of estuaries, coastal and marine waters and surface fresh waters which undergo eutrophication to which the enrichment of the water with nitrogen compounds from agricultural sources contributes. An action programme shall be implemented in each department concerned, setting out the requirements to be complied with by all farmers in the corresponding vulnerable area. They are constructed in consultation with all relevant stakeholders, based on a local diagnosis. They aim to correct the most pollution-generating practices. Outside vulnerable areas, a national code of good agricultural practice is voluntary. Each vulnerable area corresponds to a prefectural decree (coordinating basin prefect) after consulting the departmental council of Hygiene, the general and regional councils and the basin committee. Vulnerable areas shall be reviewed at least every 4 years. This decree is the founding regulatory text of the vulnerable area. The perimeter of vulnerable areas is defined by basin administrative division according to 2 methods: 1) Municipal boundaries: It covers the boundary of the set of designated municipalities in vulnerable areas. (2) Cadastral limits (infra-communal): It covers the cadastral sections selected for municipalities designated in vulnerable areas. In the case of this dataset, it is the “cadastral” (infra-communal) perimeter. In the event that a subsequent order completes the previous order, only the date of the last order will be retained. The list of vulnerable areas is established under the responsibility of the basin DREALs. Multipolygons and hole polygons are allowed.脆弱区域（Vulnerable Areas）是依据欧盟第91-676号指令划定的土地。 脆弱区域是指领土范围内，因直接或间接排放农业源硝酸盐或其他可转化为硝酸盐的氮化合物而引发的水污染，在短期内威胁水生环境质量，尤其是饮用水供应的区域。 符合以下任一情形的区域均可被认定为脆弱区域： — 地下水及地表淡水（尤其是用于或拟用于人类饮用水取水的水体）的硝酸盐含量超过50毫克/升； — 河口、近岸海域、海洋水域及地表淡水水体发生富营养化，且该富营养化由农业源氮化合物对水体的富集所导致。 各相关省域均需制定并实施行动方案，明确对应脆弱区域内所有农户必须遵守的生产要求。该方案基于本地诊断结果，经与所有相关利益相关方协商后制定，旨在纠正污染程度最高的农业生产行为。在非脆弱区域内，国家良好农业操作规范为自愿性标准。 每一处脆弱区域的划定均需经咨询卫生省议会、省议会、大区议会与流域委员会后，由流域协调专员签发省长令予以确认。脆弱区域至少每4年需进行一次复核。该省长令是脆弱区域设立的基础性监管依据文件。 脆弱区域的范围依据流域行政区划，通过以下两种方式划定： 1) 行政边界法：覆盖所有被纳入脆弱区域的市镇的行政边界； 2) 地籍边界（infra-communal，即公社级以下）法：覆盖被纳入脆弱区域的市镇所选定的地籍地块。 本数据集采用的是"cadastral"（infra-communal，即公社级以下）划定的区域范围。 若后续政令对先前划定的区域进行了补充，则仅保留最新政令的生效日期。 脆弱区域名录由流域级区域环境与规划局（DREALs）负责编制。本数据集支持多面要素（Multipolygons）与带洞面要素（hole polygons）的格式。