A dynamic river

The river, a dynamic environment, changes over time and space. It is constantly trying to dissipate its energy by eroding its banks and depositing material where the flow is low. This active strip creates diverse habitats for many species. Since 1944, its surface was reduced on average by 40% on the Calavon because of former gravel extraction activities. Its bed therefore sunk 2m, 4m locally, leaving the bedrock appear sometimes.