Non-linearity In Erosion Response Of A Small Mountainous And Marly Basin: The Laval In The Draix Experimental Catchments, South East, France.

Abstract The Draix experimental basins are located on black marls, a very erodible outcrop where erosion and gullying result both in a badlands topography and high levels of solid transport. The sediment yield measured for 16 years at the outlet of the Laval basin (0.86 km²) reveals that the erosion response to a rainfall event is highly nonlinear. Two field experiments (topographical surveys and use of marked pebbles) have highlighted the importance of deposition and scouring processes in the channel network.