The Buëch (; ) is a river in southeastern France, a right tributary of the Durance. It is long. Its drainage basin is .Bassin versant : Buëch (Le), Observatoire Régional Eau et Milieux Aquatiques en PACA Its source is in the Dauphiné Alps, near the peak of Grand Ferrand. It flows generally southward for most of its course in the Hautes-Alpes département, and flows into the Durance at Sisteron.
Départements and towns along the Buëch include: Drôme: Lus-la-Croix-Haute Hautes-Alpes: Aspres-sur-Buëch Serres Laragne-Montéglin Alpes-de-Haute-Provence: Mison Sisteron
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