...着降雨时间的增长，当降雨强度大于入渗率时，地面洼地开始积水，积水达洼蓄饱和容量时，雨水便溢出而呈坡面漫流（Overland flow），最终通过检查井进入排水管网。
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overland flow concentration 坡面汇流
overland flow concentration curve 坡面汇流曲线
overland flow hydrograph 地表径流过程线
length of overland flow 地表径流长度
velocity overland flow 地表漫流速度
overland flow path 地表径流路径
fallow overland flow 薄层漫流
The model （hf）/L=f（（a（1-ε））/（ε3））u2 coulddepict the overland flow in the litters, there f’ was a undetermined coefficient, when the flowvelocity was very low, the Ergun equation f’=（4.17）/（Re’）+0.29 could depict the overland flow.
坡面流在枯落物中流动的数学模型,可用下述模型描述hf/L=f’(a(1-ε)_ε3)u2,其中包括一个未知的待定系数f’,在流速较低时,可用欧根(Ergun)方程描述:f’=4.17/Re+0.29。
参考来源 - 黄土地区森林植被对坡面土壤侵蚀过程影响机理研究The model considered includes precipitation, interception, and infiltration, storage in micro depressions, overland flow, erosion and deposit of sediment and so on.
该模型对降雨径流产生的各个环节以及汇流做出了算法设计，考虑的过程包括降水、植被截留、入渗、微地形存储、地表径流、泥沙剥蚀与沉积等。
参考来源 - 基于GIS的区域水土流失模型设计与开发·2,447,543篇论文数据，部分数据来源于NoteExpress
For the majority of lakes, certainly those surrounded by forests, input from overland flow is too small to have a noticeable effect.
对于大多数湖泊，特别是那些被森林环绕的湖泊来说，来自地表径流的流量太小，无法产生明显的效果。
Water enters a lake from inflowing rivers, from underwater seeps and springs, from overland flow off the surrounding land, and from rain falling directly on the lake surface.
湖中的水来自于河流的水、地下渗入的水和泉水、从四周地面流进来的水，还有直接降到湖面的雨水。
Grass coverage has great influence on the change of overland flow velocity.
草被覆盖是影响坡面流流速变化过程及特征的重要因素之一。
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