Map Viewing Service (WMS) of the dataset: Non-federal watercourses subject to the Herault Water Act

The classification of watercourses in the case law(1) is essentially based on the following two criteria: — the presence and permanence of a natural bed originally, distinguishing a watercourse from a canal or a ditch dug by the hand of man but including in the definition a natural watercourse originally made artificial, provided that it provides the
proof; — the permanence of sufficient debit for most of the year assessed on a case-by-case basis by the court in accordance with
local climatic and hydrological data and based on presumptions such as the indication of the “watercourse” on an IGN map or an indication of its name on the cadastre.
In order to clarify which parts of the water system are to be considered as watercourses, the interdepartmental instruction of 3 June 2015 requested to establish, at the departmental level, a watercourse mapping and to develop a

maintenance guide for river residents.

The data entered are derived from the identification of ECs carried out by DDTM 34/SERN/PRNT in collaboration with ONEMA

became AFB and the Chamber of Agriculture in 2016.

Since then, this mapping has evolved to take into account the findings of the requests for expertise sent to DDTM 34 until 26 November 2018.

At this date, a stabilised version is available for download in the Géocatalogue.

The layer can be viewed in Cartélie:

http://www.herault.gouv.fr/Politiques-publiques/Environnement-risques-naturels-et-technologiques/Eau/Determination-des-cours-d-eau

判例法(1)中的河道分类标准主要基于以下两项核心准则：其一，初始天然河床的存在性与持久性，以此将河道与人工开挖的运河或沟渠区分开来；对于原本为天然河道后经人工改造的水体，若能提供相关证明材料，则可纳入河道定义范畴。其二，全年多数时段具备足够流量的持久性，该标准需由法院结合当地气候与水文数据逐案评估，参考依据包括IGN（法国国家地理研究院，Institut Géographique National）地图上标注的“河道”字样，或地籍簿上记载的水体名称等推定条件。
为明确水系中需被认定为河道的范围，2015年6月3日发布的部际指令要求各省级部门开展河道测绘工作，并编制面向河道沿岸居民的维护指南。
本次数据集的录入数据，源自2016年由DDTM 34/SERN/PRNT与ONEMA（法国国家水与水生环境管理局，Office National de l'Eau et des Milieux Aquatiques，后更名为AFB）及法国农业总会联合开展的ECs识别工作。
自2016年以来，该测绘成果随截至2018年11月26日提交至DDTM 34的专家咨询意见不断更新完善。
截至该时间节点，已形成稳定版本的测绘图层，可在Géocatalogue（地理数据目录）中下载。
该图层可通过Cartélie平台查看：
http://www.herault.gouv.fr/Politiques-publiques/Environnement-risques-naturels-et-technologiques/Eau/Determination-des-cours-d-eau