中文摘要：

采用变坡实验水槽，研究了坡面流阻力系数与粗糙度、雷诺数、弗劳德数、单宽流量和坡度的关系。结果表明，阻力系数随着粗糙度增大而呈指数函数增大；阻力系数与雷诺数和弗劳德数均成较薅的幂函数关系，幂指数在-1左右变化，系数随着粗糙度的增大而增大；阻力系数随着放水流量增大而减小，随着坡度的增大而增大。

英文摘要：

Experimental flume with varying slope was used to study the relationships between overland flow resistance coefficient and roughness. Reynolds number. Froude number, discharge and slope. The results indicated that resistance coefficient increased with the roughness by exponential function. There was a good power function between resistance coefficient and Reynolds number, Froude number. The resistance coefficient decreased with the increase of discharge, and increased with the increase of slope.