中文摘要：

采用室内放水冲刷试验,在不同坡度黄土坡面形成细沟,测定细沟不同位置断面水流流速及横断面形态,分析坡面细沟水流动力学特性变化规律。结果表明,随细沟侵蚀的延续,坡面细沟水流流速降低;流速随坡长的延长、坡度的增大而增大,弗汝德数随坡长的延长而减小,雷诺数和Darcy-Weisbach阻力系数随坡长的延长而增大;流速、弗汝德数、雷诺数和Darcy-Weisbach阻力系数均随坡度的增大而增大。

英文摘要：

Inflow experiments were conducted to measure the rill flow velocity and sections shape,and the hydraulic characteristics of rill flow were analyzed under different slope gradients.The results showed that the rill flow velocity decreased with rill erosion,the rill flow velocity increased with the increase of slope length and slope gradient,and the flow velocity,Reynolds number,Froude number and resistance coefficient all increased with the rise of slope gradient.