LIU Qing-quan, CHEN LI, LI Jia-chun. Influences of Slope Gradient on Soil Erosion[J]. Applied Mathematics and Mechanics, 2001, 22(5): 449-457.
 Citation: LIU Qing-quan, CHEN LI, LI Jia-chun. Influences of Slope Gradient on Soil Erosion[J]. Applied Mathematics and Mechanics, 2001, 22(5): 449-457.

# Influences of Slope Gradient on Soil Erosion

• Rev Recd Date: 2000-02-03
• Publish Date: 2001-05-15
• The main factors influencing soil erosion include the net rain excess,the water depth,the velocity,the shear stress of overland flows,and the erosion-resisting capacity of soil.The laws of these factors varying with the slope gradient were investigated by using the kinematic wave theory.Furthermore,the critical slope gradient of erosion was driven.The analysis shows that the critical slope gradient of soil erosion is dependent on grain size,soil bulk density,surface roughness,runoff length,net rain excess,and the friction coefficient of soil,etc.The critical slope gradient has been estimated theoretically with its range between 41.5°~50°.
•  [1] Zingg A W.Degree and length of land slope as it affects soil loss in runoff[J].Agric Eng,1940,21:59-64. [2] 汤立群,陈国祥.小流域产流产沙动力学模型,水动力学研究与进展,A辑,1997,12(2):164-174. [3] Yair A,Klein M.The influence of surface properties on flow and erosion processes on debris covered slopes in an arid area[J].Catena,1973,1(1):1-8. [4] Renner F G.Conditions influencing erosion of the boise river watershed[Z].V S Dept Agric Tech Bull,1936,528. [5] 陈法扬.不同坡度对土壤冲刷量影响试验[J].中国水土保持,1985,(2):24-30. [6] Horton R E.Erosional development of streams and their drainage basins,hydrophysical approach to quantitative morphology,Geol Soc Amer Ball,1945,56(3):275-370. [7] Singer M J,Blackard J.Slope angle-interrill soil loss relationships for slopes up to 50%[J].Soil Sci Soc Am J,1982,46(6):1270-1273. [8] ZHANG Ke-li,Hosoyamada K.Influence of slope gradient on interrill erosion of shirasu soil phys[J].Cond Plant Growth Jpn,1996,(73):37-44. [9] Emmett W W.Overland flow [A].In:Kirkby M J Ed.Hillslope Hydrology[C].John:Wielyand Sons,1978. [10] Woolhiser D A,Liggett J A.Unsteady one-dimensional flow over a plane-the rising hydrograph[J].Water Resoyr Res,1967,3(3):753-771. [11] Lima J L M P.Model KININF for overland flow on pervious surface[A].In:A J Parsons Ed.Overland Flow[C].UCL Press,1992. [12] 曹文洪.土壤侵蚀的坡度界限研究[J].水土保持通报,1993,13(4):1-5.

### Catalog

###### 通讯作者: 陈斌, bchen63@163.com
• 1.

沈阳化工大学材料科学与工程学院 沈阳 110142