Simple download service (Atom) of the dataset: Vulnerable areas in the Grand East

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 area）系依据欧盟第91/676号指令划定的陆地区域。

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水污染，并在短期内威胁水生环境质量，尤其是饮用水供应的区域。

符合以下两类情形的区域应被认定为脆弱区域：
— 地下水和地表淡水（尤其是用于或拟用于人类饮用水取水的水体）硝酸盐含量超过50毫克/升；
— 河口水域、近岸海域、海洋水域以及因农业源氮化合物富集而发生富营养化的地表淡水水域。

各相关省份应针对所辖脆弱区域制定并实施行动计划，明确对应区域内所有农户需遵守的生产要求。此类行动计划基于本地调研诊断结果，经与所有相关利益相关方磋商后编制，旨在纠正污染贡献最大的农业生产行为。在非脆弱区域内，国家良好农业规范指南为自愿性标准。

每个脆弱区域的划定均需在征询省卫生委员会、省议会与大区议会及流域委员会的意见后，由省长令（流域协调专员签发）予以确认。脆弱区域的划定范围至少每4年需开展一次复核。该省长令为脆弱区域划定的基础性法定文书。

脆弱区域的划定范围依据流域行政区划，采用以下两种方式界定：
1. 市镇行政边界：覆盖被纳入脆弱区域的所有指定市镇的行政管辖范围；
2. 地籍界线（公社以下层级）：覆盖被纳入脆弱区域的指定市镇所选定的地籍地块范围。

本数据集采用的是“地籍（公社以下层级）”划定范围。

若后续政令对前期划定的脆弱区域范围进行补充调整，则仅保留最新政令的生效日期。

脆弱区域名录由流域级DREAL（区域环境、规划与住房局，Direction Régionale de l'Environnement, de l'Aménagement et du Logement）负责编制。本数据集支持多面几何要素（Multipolygons）与带孔洞的面几何要素（hole polygons）格式。