Mapping of watercourses under GAEC, NTAs and Water Police for 2022

The government instruction of 3 June 2015 requires the State services to carry out a mapping of rivers in each department to facilitate the proper implementation of the water law as well as a guide to the maintenance of rivers.
In the Marne, to avoid multiplying cartographic repositories, the watercourse map reference is unique for:
— the ZNTs
— GAEC
— watercourses water police
The JDD “MAA_June_2021” was built from the hydrographic layer of the Topo BD and based on the field findings made by the DDT de la Marne and the French Office for Biodiversity since 2017.

The ‘TYPE_EC’ field makes it possible to characterise the nature of the flow.

This dataset “MAA_June_2021” corresponds to the flows qualified as rivers under good conditions
agri-environmental (GAEC)

2015年6月3日发布的政府指令要求各省的国家公共服务机构开展河流测绘工作，以保障《水法》的有效实施，并为河流养护提供规范指引。
在马恩省，为避免重复构建测绘资料库，河道地图的参考依据仅涵盖以下对象：
— ZNTs
— 农业环境相关主体（GAEC）
— 河道水上执法部门
数据集（JDD）"MAA_June_2021"依托Topo BD的水文图层，并基于马恩省DDT与法国生物多样性办公室自2017年起获取的野外勘测数据构建而成。
"TYPE_EC"字段可用于表征径流的性质。
本数据集"MAA_June_2021"对应符合良好农业环境（GAEC）标准的河流型径流。