头道沟流域是我国干旱区众多没有冰川融水补给河流中年径流量较大的河流,分析该流域的悬移质特征对我国干旱区众多没有冰川消融水补给的中小流域的水资源利用和水利建设具有普遍的意义。而影响泥沙的主要因素是地形、地貌、降水和洪水。根据20多年的实测资料,利用数理统计原理进行分析,发现这类区域悬移质泥沙的输移量可达多年均值的20多倍,这种特殊的悬移质泥沙运行特征,供从事水利勘测、设计工作者参考。
The Toudaogou River Basin is one of the many rivers with high annual runoff volume but without glacier meltwater feeding in arid area in China. It is of popular sense for utilizing water resources and constructing water conservancy projects in the moderate and small drainage basins without glacier meltwater feeding in arid area in China to analyze the features of suspended silt discharge in the Toudaogou River Basin. The main factors affecting suspended silt discharge include the terrains, landforms, precipitation, flood, etc. In this paper, the data measured in the Toudaogou River Basin for more than 20 years were analyzed using the principle of mathematical statistics. It was found that an annual suspended silt discharge in such arid drainage basin could be as high as more than 20 times of the average value, and these features of suspended silt discharge could be referred in surveying and designing water conservancy projects.
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