
The Durance is the most important river in Provence and the third largest tributary of the Rhône, behind the Saône and the Isère. It rises in the Hautes-Alpes in the municipality of Montgenèvre and is soon joined by the Clarée and Guisane rivers, which flow past it despite being longer and having a greater flow at the confluence point. The Durance valley has been a major communication route for centuries, and its capricious nature has been controlled by the artificial lake at Serre-Ponçon and a canal running downstream. The old proverb from the Ancien Régime, which once claimed that "the three scourges of Provence are the Mistral, the Durance and Parliament", has now been forgotten, and the Durance now brings nothing but life to the land it irrigates..