Characteristics of Runoff and Sediment Yield under Different Rainfall Intensities and Slope Gradients of Disturbed Soil in Development and Construction of Piedmont Plain in North China
[Objective]This paper aimed to provide a theoretical basis for the study of soil erosion in the North China Plain,the evaluation and estimation of soil erosion,and the rational formulation of control measures.[Method]Using the experimental method of artificial rainfall simulation,the effects of different slopes and different rainfall intensity on the characteristics of soil erosion,runoff and sand production were studied.[Result]Under the same slope condition,the initial runoff time decreased significantly with the increase of rainfall intensity,and the greater the rainfall intensity,the shorter the time required for runoff.The runoff rate increased with the increase of rainfall intensity.Under different rainfall intensity conditions,the runoff rate increased with the increase of slope.The runoff yield of the slope increased with the increase of rainfall intensity,and the runoff yield increased with the increase of slope under the same rainfall intensity.Under the same slope,sediment yield and sediment concentration gradually increased with the increase of rainfall intensity.[Conclusion]There was a significant positive correlation between rainfall intensity and sediment yield and runoff yield.Slope has a very significant positive correlation with runoff and sediment yield,and there is also a very significant positive correlation between runoff and sediment yield.Rainfall intensity has a greater impact on soil erosion than slope.
artificially simulated rainfallsoil erosionproduction flowsand production
万方数据
维普
