The area of freedom of the river

In the alluvial plain, due to the floods, the Calavon can shift its bed onto a "corridor" called area of freedom. These shifts by soil erosion can slower the water and are the sources of the ecosystem diversity. Too often, man has obstructed this lateral mobility by keeping the river in a constrained manner with rip-rap or embankments. Preserving, and even restoring, this area contributes to a good water status and the protection against flooding.