Adour basin

Machine-translated from the French article

The Adour basin, the watershed of the Adour river and its tributaries, also refers to the corresponding sedimentary basin. The majority of its watercourses rise in the Pyrenees, and the watershed has an area close to 17,000 km². The Adour basin notably includes the watersheds of the Gave de Pau and the Gave d'Oloron, which form the Adour's main tributary, joining it 10 km after their own confluence at Peyrehorade.