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通过室内模拟降雨试验分析出不同坡形坡面侵蚀产沙过程,研究结果表明:同坡度、同雨强条件下,水流含沙量随坡形的变化具有明显的规律性,整个降雨过程中,凹形坡的水流含沙量最大,凸形坡的其次,直线形坡的最小。随着降雨历时的延长和雨强、坡度的增大,坡形对侵蚀产沙的影响还会越来越大;并且在同坡形条件下,水流含沙量随雨强、坡度的增加明显增大。
Through simulating indoor rainfall experiment, the process of erosion and sediment yield was analyzed. The results show that under the condition of the same slope and the same rainfall intensity, the sediment concentration of the water flow varies obviously with the slope shape. During the whole rainfall, Concave slope of the largest water sediment, convex slope followed, the smallest linear slope. With the prolongation of rainfall and the increase of rainfall intensity and gradient, the impact of slope shape on the erosion and sediment yield will be more and more large. Under the same slope condition, the sediment concentration of the water flow increases with the increase of rainfall intensity and gradient Increase.