For the majority of lakes, certainly those surrounded by forests, input from overlandflow 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。
2
Water enters a lake from inflowing rivers, from underwater seeps and springs, from overlandflow 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。
3
Grass coverage has great influence on the change of overlandflow velocity.