Relationship between raindrop erosion and runoff erosion under simulated rainfall in the Sudano-Sahel : consequences for the spread of nematodes by runoff

Rainfall simulation in geomorphology

Auteurs :
PLANCHON, O.
CADET, P.
LAPETITE, J.-M.
SILVERA, N.
ESTEVES, M.
PARSONS, A.J.

Description :
This paper presents a rainfall simulation experiment carried out on three 50 m2 plots in the Senegalese groundnut belt. The results indicate that the carrying capacity of the runoff at the scale of 10 m2, on gentle slopes ploughed perpendicular to the slope, could not be directly calculable from the discharge. It could depend on the history of past discharges because the shape of the flow paths, which condition their carrying capacity, permanently interacts with the discharge. These interactions could explain the great difficulties encountered by the erosion models in the case of low discharges on non-cohesive soils.


Type de document :
Article de monographie

Source :
Earth surface processes and landforms, issn : 0197-9337, 2000, vol. 25, n°. 7, p. 729-741, Collation : Illustration, Références bibliographiques : 27 ref.

Date :
2000

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley