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淤地坝是韭园沟与秃尾河流域重要的水土保持工程之一,淤地坝所处流域和工程结构的不同,淤积物的粒径大小存在差异。通过钻孔取样法采集了韭园沟流域21座淤地坝和秃尾河流域36座淤地坝淤积物样品623个,根据样品的颗分结果,分析得出韭园沟流域淤地坝坝内粗泥沙粒径主要为0.05 mm,秃尾河流域淤地坝坝内粗泥沙粒径主要分布于0.05~0.10 mm之间,说明淤地坝能有效拦截流域内的粗泥沙;两流域淤地坝均呈现库尾泥沙粒径总体大于坝前,库尾泥沙粒径的大小取决于入库泥沙粒径的大小,入库泥沙粒径越大,淤地坝对其分选效果越明显。
Warping dams are one of the important soil and water conservation projects in Jiuyuangou and Tuweihe watersheds. Dredging dams are located in different drainage basins and engineering structures, and there are differences in the size of sediment. Totally 623 silt dam in the Jiuyuangou basin and 36 silt dam in the Tuwei river basin were collected by drilling sampling method. According to the result of the grading of the sample, The diameter of coarse sediment is mainly 0.05 mm. The coarse sediment diameter of dam in Damou River watershed dam mainly distributed in the range of 0.05-0.10 mm, indicating that silt dam can effectively intercept the coarse sediment in the basin. Dams are presented at the end of sediment sediment size larger than the dam before the end of sediment size depends on the size of sediment storage size, the greater the size of sediment storage, check dam selection The effect is more obvious.