overland flow

Under a bigger flow discharge, the raindrop splash would slow down the velocity of the overland flow, and the higher rainfall intensity, the smaller extent the flow velocity decreased.

当放水流量较大时，降雨使坡面薄层水流流速降低，且雨强越大，流速减幅越小。

On the base of overland flow theory, by one-dimension kinetic wave model, the formula for overland flow is deduced, which includes configuration and land feature in loess donga.

根据坡面流理论，运用一维运动波模型，推导出了考虑黄土沟壑区地形地貌条件的坡面产流公式。

Reynolds Number and Froude number of overland flow tend to diminish, water flow velocity tends to diminish, and resistance coefficient tends to increases as bed surface roughness increases in the condition of same slope gradient and flow discharge.

在坡度和流量相同情况下，随着坡面粗糙度增加，坡面流雷诺数和佛汝德数均呈减小趋势；

The relationships for hydro-dynamic parameters ( Reynolds number, Froude number, resistance coefficient and flow velocity) of overland flow as a function of bed roughness, flow discharge and slope gradient were simulated by means of indoor fixed-bed resistance experiments.

在室内试验的基础上，采用定床阻力试验研究了坡面流水力学参数（雷诺数、佛汝德数、阻力系数和流速）随床面糙率、流量和坡度的变化规律。

Quantitative effects of hydro-dynamic parameters on soil detachment capacity of overland flow

坡面流水动力学参数对土壤分离能力的定量影响

It's significant for understanding the soil loss mechanism of grass covered land to study the changing process and characteristics of overland flow energy with different coverages of grass vegetation and spatial distributions in the slope-gully erosion system.

研究坡沟系统坡面草被不同盖度及空间配置下坡面流能量的变化过程与特征，对于揭示草被减蚀作用机理有重要意义。