A mass of river water is a distinct and significant part of surface waters such as a river, river or canal, part of a river, river or canal, constituting the elemental division of aquatic environments intended to be l' unit d' assessment of the WFD.
The river water masses are derived from the BDCarthage® v3 hydrographic theme of the BDCarto®.
The criteria for the realisation of the masses d'river water are:
— A body of water belongs to a single hydroecoregion
— The dominant fish settlement based on the fish context (Salmonicole, cyprinicole, Intermediate)
— Size class (strahler confluence row)
The code of mass d'water is structured as follows:
Mass type code d'water + Basin code (district as defined in dce) + Increment
Correspondence report DCE: this entity corresponds to WISE’s River Water Body (RWBODY) concept.
__Origin__
The data are collected from DEAL Réunion
__Partner organisations__
Ash, French Agency for Biodiversity (AFB) — Pôle de Vincennes (ex National Office for Water and Aquatic Environments)
__Links annexes__
* [see documentation on Sandre website](http://www.sandre.eaufrance.fr/squelettes/consulter_fiche_entite.php?dictionnaire=/db/sandre/Schemas/mdo/1.3/sandre_fmt_xml_mdo.xsd&entite=MasseDEauSouterraine)
[See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/b890332bf17cc1560212841d4c8061a8c7b87249)
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