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树篱是一种特殊的地貌特征 .成排根部壅土的树 ,像挡水坝一样改变了地面径流过程 .本文在无树篱流水网推导方法的基础上 ,提出了树篱条件下流水网的推导方法 .然后用统计和对比分析的方法 ,研究树篱对径流过程的影响 .对四个流域上的研究表明 ,树篱对各网格到河网或流域出口的平均距离改变不大 ,影响最大的是有树篱的网格单元的集水面积 ,及其沿径流流向上的坡度的变化 .沿树篱方向高程起伏会形成许多洼点 ,这些洼点拦蓄地面径流是对径流过程产生影响的另一个主要方面 .
Hedges are a kind of special geomorphological features.The trees in the rows of root soil change the surface runoff process like the retaining dam.On the basis of the non-hedge flow network derivation method, this paper puts forward the derivation method of the flow network under the hedgerows. Then, the effects of hedgerows on the runoff were studied by means of statistics and comparative analysis.The research on the four basins showed that the average distance of hedgerows to the grids or the outlet of the river basins did not change much, the most influential ones were hedges And the change of gradient along the runoff.However, there are many potholes formed along the hedgerows, and the interception of these runoffs is another major aspect that affects the runoff process.