Reference Hydrographic Units — UHR

Hydrographic partitions of the Adour Garonne basin defined by the 1996 SDAGE and preserved in the SDAGE 2010 and 2016 for surface waters whose definition logic is based on the following three points: — strong hydrogeographic coherence: they are watersheds or homogeneous sections for large watercourses, — a medium size that allows the rise of local concerns as well as a good representation in the discussions at the level of large basins: Adour, Lot, Charente, Dordogne, Tarn-Aveyron, Garonne, coastline and deep tablecloths, — a good framing of these units by the nodal networks of the SDAGE (quality and quantity). __Origin__ Data from collaborative discussions DAF — Agence DIREN.. on the Adour Garonne basin. The objects have been translated into hydrographic zones for the agency then in common for the DAF __Partner organisations__ Agency of l'eau Adour-Garonne [See this page on geo.data.gouv.fr](https://geo.data.gouv.fr/fr/datasets/b9c8885300336d42ff8f69c1a595d0d80a39d023)