The valley narrows for a few kilometres until the water gap at Mirabeau, at a depth of 200 metres (660 ft), then widens again into an even broader plain until the confluence with the Rhône south of Avignon.
Its direction changes from southerly to westerly then northwesterly, aligning with the small Provençal mountain ranges between which it flows (Alpilles and Luberon).
The Durance receives only one significant tributary on this last part of its course: the Calavon, which flows around the Lubéron range to the north.
The valley narrows for a few kilometres until the water gap at Mirabeau, at a depth of 200 metres (660 ft), then widens again into an even broader plain until the confluence with the Rhône south of Avignon. Its direction changes from southerly to westerly then northwesterly, aligning with the small Provençal mountain ranges between which it flows (Alpilles and Luberon). The Durance receives only one significant tributary on this last part of its course: the Calavon, which flows around the Lubéron range to the north.
Durance