Le Bissonnais Y., Benkhadra H., Chaplot Vincent, Fox D., King D., Daroussin J. (1998). Crusting, runoff and sheet erosion on silty loamy soils at various scales and upscaling from m2 to small catchments. Soil and Tillage Research, 46 (1-2), p. 69-80. ISSN 0167-1987.
Titre du document
Crusting, runoff and sheet erosion on silty loamy soils at various scales and upscaling from m2 to small catchments
Le Bissonnais Y., Benkhadra H., Chaplot Vincent, Fox D., King D., Daroussin J.
Source
Soil and Tillage Research, 1998,
46 (1-2), p. 69-80 ISSN 0167-1987
Water erosion is one of the most active processes in soil genesis and dynamics. It is also at the origin of significant environmental problems. Soil surface state is one of the most important factors for erosion risk assessment. However, it is not easy to determine the effect of this factor at a large scale. A field experiment was held in Pays de Caux (Normandy, France) in order to study and quantify crusting, runoff and sheet erosion at the cultivated field and catchment scales. We measured crust formation, runoff and erosion during two seasons on 1-m(2), 20-m(2) and 500-m(2) experimental plots and on a small catchment. Results allow a ranking of the most important factors influencing crusting and erosion at the different scales. They also enable the development of relationships for upscaling from small plot results to the cultivated field and catchment for specific conditions. However, upscaling from plots to catchments is generally difficult and needs to take catchment spatial structures into account. We distinguish between runoff and erosion scale transfer, the latter being at the origin of specific problems that need further research to be solved.
