不同治理度下小流域正态整体模型试验——工程措施对小流域径流泥沙的影响

Simulated Experimental Study on Normalized Integrated Model for Different Degrees of Erosion Control for Small Watersheds

该文首次运用正态整体模型试验方法研究小流域在不同治理度下的水沙变化规律。试验结果表明小流域坡面治理存在一个明显阈值 ,黄丘区第二付区为 80 % ;沟道布坝密度对流域径流泥沙影响显著 ,并首次提出黄丘区第二付区不同治理度阶段的布坝密度界限值。

For the first time, a series of simulated experiments on normalized integrated model for different degrees of erosion control were conducted to investigate the relation of runoff and sedimentation. The results showed that there is a critical value for the erosion control of slope surface, which was about 80 percent, in accordance with the experimental results, in the secondary sub regions of Hilly and Gully Leoss Regions. Moreover, the density of dams in the gullies had obvious effects on runoff and sedimentation in watersheds. And the critical value for dam density on different degrees of erosion control was suggested for the secondary sub regions.