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[1]ZHANG Hui-ru,ZHENG Fen-li,GENG Xiao-dong.Effect of Slope Gradients on Soil Erosion Process in Red Earth Hillslopes[J].Research of Soil and Water Conservation,2009,16(04):52-54,59.

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Effect of Slope Gradients on Soil Erosion Process in Red Earth Hillslopes

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 04 Page number: 52-54,59 Column: Public date: 2009-08-20

Title:: Effect of Slope Gradients on Soil Erosion Process in Red Earth Hillslopes

Author(s):: ZHANG Hui-ru^1,2, ZHENG Fen-li^1,2, GENG Xiao-dong^2,3; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China;
3. Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Keywords:: red earth hillslopes; slope gradient; runoff process; soil erosion process; simulated rainfall experiment

CLC:: S157.1

DOI:: -

Abstract:: The simulated rainfall experiment was used to quantify the effects of slope gradients on runoff and soil erosion processes on red earth hillslopes. The results showed that runoff rates decreased with an increase in slope gradients. Compared to 5° slope, runoff rate on 25° slope decreased by 22.3%. The timing of reaching stable runoff reduced with an increase of slope gradients. Sediment contents in runoff and soil loss increased when slope gradients increased from 5° to 25°, but when slope gradients changed from 20° to 25°, sediment contents in runoff and soil loss decreased. The critical slope degree on effects of slope gradient on soil erosion process and the value is between 20° and 25°.

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