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[1]ZHANG Xiang,GAO Zhaoliang.Processes of Runoff and Sediment Yield on the Slopes with Different Lengths on Lou Soil Mound[J].Research of Soil and Water Conservation,2018,25(06):79-84,93.

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Processes of Runoff and Sediment Yield on the Slopes with Different Lengths on Lou Soil Mound

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 06 Page number: 79-84,93 Column: Public date: 2018-10-26

Title:: Processes of Runoff and Sediment Yield on the Slopes with Different Lengths on Lou Soil Mound

Author(s):: ZHANG Xiang¹, GAO Zhaoliang²; 1. Pingxiang University, Pingxiang, Jiangxi 337000, China;
2. Institute of Soil and Water Conservation, Yangling, Shaanxi 712100, China

Keywords:: Lou soil; engineering mound; runoff and sediment; runoff scouring

CLC:: S157.1

DOI:: -

Abstract:: In order to reveal the processes of runoff and sediment yield on the slopes with different lengths on Lou soil mound, through the field simulated runoff-scouring experiment under the conditions of different slopes and different slope lengths (4, 8, 12, 16, 20 m), the processes of runoff and sediment yield on the slope of Lou soil mound were analyzed. The results show that the flow rate on the slope of the engineering mound increases with the constant fluctuation over the water discharge scouring time. With the increase of slope length, the amplitude of fluctuation of sediment yield is larger. The sediment concentration of runoff decreases first and then keeps stable over the water discharge scouring time. With the increase of slope length, the sediment content increases. The cumulative flow rate on the slope of engineering mound with the change of the time of water drainage can be expressed using linear function. There is a very significant power function relationship between cumulative sediment yield and water drainage time. Both of them show the increasing change with the increase of the slope length. The test slope and the length of the slope have the important influences on the cumulative runoff yield and sediment yield. The effect of slope length on cumulative runoff and sediment yield is greater than that of slope gradient, and all of the two factors have the positive effect on cumulative runoff and sediment yield.

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