中文摘要：

通过对室内凸型复合坡面进行2种不同流量（6,8L/min）的放水冲刷试验,对凸型复合坡面的径流能量变化特征进行了研究。结果表明：（1）不同流量的径流能量和径流动能呈现出相似的变化规律,即径流能量随断面远离坡顶呈下降趋势,径流动能总体呈增大趋势,但变化规律较为复杂;随着径流流程的增加,径流能量急剧下降,当径流进入复合坡面的下坡后,这种趋势更显著。（2）径流能耗随断面位置的增加不断增加,不同流量均有相似的变化趋势,随着径流流程的增加,能耗呈明显增加趋势,当径流进入复合坡面的下坡面后,这种趋势更显著。（3）复合坡面径流势能远大于径流动能,径流能量消耗过程与侵蚀产沙量过程的变化基本一致,并建立了产沙量和能耗之间的相关方程。

英文摘要：

Composite-slopes is a common major slope type in the nature,especially in the Chinese Loess Plateau.By scouring experiments,the runoff energy of the system with two water inflow rates of 6L/min and 8L/min were studied.The results showed that：（1）The runoff energy and runoff kinetic energy had the similar variation under different water inflow rate,that was,the runoff energy had a gradual downward trend with section away from the top of the hill section,but the runoff kinetic energy had a more complex variation.The runoff energy presented a sharp decline trend with the increase of runoff processes,and this trend was more pronounced after the runoff went into the down slope.（2）The energy consumption presented an increasing trend with the runoff processes under different water inflow rate.The runoff energy had an increasing trend with the runoff processes,especially after the runoff into the down slope.（3）The runoff potential energy was much larger than the runoff kinetic energy.The runoff energy consumption process basically kept the same change with the erosion sediment yield.And the relationship between erosion sediment yield and runoff energy consumption was established.