Hydrographic Regions — Metropolis 2017 — BD Carthage

The hydrographic division is l' all of the four hierarchical partitions of the French territory made according to decreasing hydrographic areas: — hydrographic region (1st order), — hydrographic sector (2nd order), — hydrographic subsector (3 rd order), — hydrographic area (4th order). A hydrographic region is divided according to a maximum of 10 sectors. The list of hydrographic regions was established in Circular No. 91-50 of 12 February 1991 but the determination of their boundaries is under the responsibility of the Water Agencies. __Origin__ Updated by l'IGN following requests from Agences de l'Water according to an annual cycle. The consolidated version is then sent to the Sandre __Partner organisations__ Ash, Agence de l'eau Adour-Garonne, Agence de l'eau Artois-Picardie, Agence de l'eau Loire-Bretagne, Agence de l'eau Rhine-Meuse, Agence de l'Rhone-Méditerrannée water and Corsica, Agence de l'eau Seine-Normandie __Links annexes__ * [see scenario d' geographical exchange of the hydrographic reference](http://www.sandre.eaufrance.fr/urn.php?urn=urn:sandre:scenario-d-echanges-geographique:eth:FRA:::ressource:1:) * [see the interactive dictionary on Sandre website](http://id.eaufrance.fr/ddd/ETH/2002-1#RegionHydro) * [data download — XML Format](https://api.sandre.eaufrance.fr/referentiels/v1/regionhydro.xml) * [see Dictionary & Hydrographic Reference (ETH)"](http://www.sandre.eaufrance.fr/?urn=urn:sandre:notice:dictionnaire::theme:ETH:ressource:2002-1:::html) [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/40b38292349ede28f70da6392dc31df40a024a3a)