水利水保措施对黄土地区产流模式的影响研究

Study of the Flow Production Impacts by Conservancy Measures in Loess Areas

随着水利水保措施的实施和流域治理程度的提高，流域内径流泥沙不断受到拦蓄，一方面表现为出口断面的水沙量变小；另一方面表现为次洪过程线特征发生变化，以及径流中地下径流的含量增加。对小理河流域治理前后次洪过程特征进行分析及径流成分分割计算的结果表明，流域产流模式呈现由超渗产流向蓄满产流过渡的趋势。

s conservancy and water/soil conservation measures are implemented and more and more areas are put under control in the watershed,more and more of the sediment run-off is retained.on the one hand.the flow-sediment volume of the estruarine sections decreases;on the other hand,the secondary-flood hydrograph varies and the groundwater contributes more and more to the total run-off.Analysis of the secondary flood hydrograph before and verse after the xiaolihe watershed is managed and split calculations of run-off constituents as contained in this paper indicates that the flow-production model is taking such a tendency that seepage flow changing to detention flo w.