HR: 0800h
AN: H51C-0371 [Abstracts]
TI: Measured and Modeled Rainfall Induced Soil Erosion under Varying Antecedent Soil Moisture
Conditions
AU: * Tromp-van Meerveld, H J
EM: Ilja.vanMeerveld@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, EPFL-ENAC
Station 2, Lausanne, 1015
Switzerland
AU: Parlange, M B
EM: Marc.Parlange@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, EPFL-ENAC
Station 2, Lausanne, 1015
Switzerland
AU: Parlange, J
EM: jp58@cornell.edu
AF: Cornell University, 228 Riley-Robb Hall, Ithaca, NY 14853
United States
AU: Sander, G
EM: g.sander@lboro.ac.uk
AF: Loughborough University, Loughborough, Leicestershire, LE11 3TU
United Kingdom
AU: Barry, D A
EM: Andrew.Barry@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, EPFL-ENAC
Station 2, Lausanne, 1015
Switzerland
AU: Musy, A
EM: Andre.Musy@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, EPFL-ENAC
Station 2, Lausanne, 1015
Switzerland
AB:
The majority of detailed laboratory soil erosion experiments have been done for soil profiles that are near saturation.
Hence, tests of mechanistic models for the prediction of rainfall-induced soil erosion have been based on this condition. We
systematically studied rainfall-induced soil erosion on a tilting 2 m by 6 m erosion flume under controlled laboratory
conditions for different initial soil moisture conditions, rainfall intensities and slopes. Antecedent moisture conditions
were found to have a large influence on the total mass of eroded material and especially on peak sediment concentrations. We
modified the Hairsine and Rose soil erosion model to allow for infiltration and temporally varying depth of ponding. The
modified model is used to explore the relationship between antecedent soil moisture and soil detachability. The model's
applicability is assessed by comparison of its predictions with the measured eroded soil (particle size distribution and
temporal distribution) at the exit of the experimental flume.
DE: 1815 Erosion
DE: 1850 Overland flow
DE: 1862 Sediment transport (4558)
DE: 1865 Soils (0486)
DE: 1866 Soil moisture
SC: Hydrology [H]
MN: Fall Meeting 2005