小浪底水库异重流排沙效率分析

Analysis on Efficiency of Sediment Removal by Hyperpycnal Flow in Xiaolangdi Reservoir

根据2014年黄河调水调沙实测资料,本文结合小浪底水库的水沙条件和运行情况,分析异重流排沙效果和水库排沙比的影响因素。2014年,黄河调水调沙成功塑造了异重流,但此次异重流排沙比偏低,原因是小浪底水库保持高水位,异重流运行时间较短,并且潜入点距大坝较远,不利于异重流的运行。

According to the measured data of water and sediment control of the Yellow River in 2014,this paper analyzes the sediment discharge effect of the hyperpycnal flow and the factors affecting the sediment discharge ratio of the reservoir in combination with the water and sediment conditions and operation conditions of the Xiaolangdi Reservoir.In 2014,the Yellow River water and sediment adjustment successfully shaped the hyperpycnal flow,but the sediment discharge ratio of the hyperpycnal flow was low this time,because the Xiaolangdi Reservoir maintained a high water level,the hyperpycnal flow was operated for a short time,and the diving point was far away from the dam,which was not conducive to the operation of the hyperpycnal flow.