Journal of University of Chinese Academy of Sciences >
Rational Computational Method of Soil Erodibility andCritical Shear Stress from Experimental Data
Online published: 2004-07-10
With the analysis of the Water Erosion Prediction Project ( WEEP), simulated rill experiment inlaboratory was conducted to determine the soil erodibility parameter K r and critical shear stressc. The result showsthat soil erodibility parameter K r is the same for a same experimental soil with similar soil physical condit ions underdifferent slope gradients. Soil erodibility parameter K r of used sil-t clay soil ( Loess soil ) is ( 0324-0003) kg??N-1 ??s-1 on the average. Critical shear stressc tends to increasewith the slope gradient, for 3198 N??m-2,3976Nm-2, 4043 N??m-2, 4165 N??m-2,4??870 N??m-2 under5°,10°??, 15°, 20°, 25°respectively?? The coefficients ofdetermination Rare more than 71% under different hydraulic condit ions. The paper advances a rational method tocalculate quant itatively the soil erodibility parameter K r and critical shear stressc, which is helpful for developingand perfecting the soil erosion prediction model.
ZHANG Qing-Wen , LEI Ting-Wu , PAN Ying-Hua , GAO Pei-Ling . Rational Computational Method of Soil Erodibility andCritical Shear Stress from Experimental Data[J]. Journal of University of Chinese Academy of Sciences, 2004 , 21(4) : 468 -475 . DOI: 10.7523/j.issn.2095-6134.2004.4.007
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