中文摘要：

利用概化的坡沟系统模型，采用室内放水冲刷试验，对黄土高原坡沟系统径流侵蚀产沙过程进行模拟研究．结果表明：坡沟系统的产流产沙速率随流量的增大而增大；产流量随放水量的增大呈明显的指数函数变化趋势，且增长率有增大趋势；产沙量随冲刷流量的增大呈幂函数增大趋势，增长率却逐渐减小；冲刷流量相同时，产沙速率随冲刷历时呈现出波动式的双峰增长趋势；在实验流量和时间范围内，坡沟系统的累积产沙量随累积径流量呈现出非常显著的二次函数关系．

英文摘要：

Sediment yield process of the slope-gully system on the loess plateau was studied experimentally in flume by using a physical model for the slope-gully system and the runoff scouring method. It was found that the speed of runoff and sediment generation of the slope-gully system was rising with the increase in the scouring flow. The relation between the runoff yield and scouring flow was established as the exponential function, and the rate of increment increased gradually. Sediment yield increased as the power function with the scouring flow increased, but the rate of increment decreased. The rate of sediment yield was taken on the fluctuant increasing tendency of two peak values. The relationship between the accumulating sediment yield and accumulating runoff was established as the quadratic function in the range of experimental flow and duration time.