Title of article :
Soil erosion due to rainfall impact with inflow: an analytical solution with spatial and temporal effects
Author/Authors :
W.L. Hogarth، نويسنده , , J.-Y Parlange، نويسنده , , C.W. Rose، نويسنده , , G.C. Sander، نويسنده , , T.S Steenhuis، نويسنده , , Andrew Barry، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
9
From page :
140
To page :
148
Abstract :
An approximate analytical solution is obtained for a physically based model of soil erosion on a gentle slope driven by rainfall impact in which there is inflow of clear or nearly clear water to the top of the soil bed. Comparison of the approximate analytical and numerical solutions shows very good agreement, except for the first few minutes of an erosion event. The approximate analytic solution is applied using data from an illustrative experiment to explore its physical features. The importance of adequately defining the soilʹs settling velocity characteristic through the use of a sufficient number of sediment size classes, especially for prediction at short times, is illustrated. The temporal variation in sediment concentration, except at short times, is shown to be more significant than the spatial variation down the eroding surface. Solution of the equations allows visualization of the rate of convective transport of sediment down the eroding surface, this rate decreasing as sediment size increased due to more frequent return of such particles to the soil surface in deposition.
Keywords :
Soil erosion by rainfall , Sediment detachment , Sediment classes , Analytical solution , Water inflow
Journal title :
Journal of Hydrology
Serial Year :
2004
Journal title :
Journal of Hydrology
Record number :
1098288
Link To Document :
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