Camargue (kämärgˈ) [key], alluvial lowland, c.215 sq mi (560 sq km), Bouches-du-Rhône dept., SE France, in the Rhône delta. Formed by sedimentation, it has numerous shallow lagoons cut off from the sea by sandbars. The northern part has been partially reclaimed and is used for cattle raising (the cowboys are called gardiens ). The south has reed-covered swamps. The Camargue has several environmental preserves. Rice production and tourism are both important.