小浪底水库异重流运动特征分析

Analysis on the movement characters of the density current in Xiaolangdi reservoir

小浪底水库蓄水运用后经常出现异重流 ,而 2 0 0 1年高含沙异重流的测验最为全面。本文以 2 0 0 1年资料为基础 ,对小浪底水库异重流形成的水沙特征 ,潜入点的变化及影响因素进行了分析 ,通过流速、含沙量和泥沙组成的变化 ,分析了异重流在库区的运动特征 ,初步推导并建立了小浪底库区异重流输沙能力关系式。

The density current often occurred in Xiaolangdi reservoir after its “storing water ' operation and rich measured data were obtained in 2001. Based on field data, this paper analysed the water-sediment condition to form the density current, the changes of the occurring spot, the related influence factors and its movement characters according to the changes of the flow velocity, sediment concentration and sediment size. Finally, a formula to calculate the sediment transport capacity of the density current in Xiaolangdi reservoir is established.