摘要
阐述了黄河干流水库联合调度塑造异重流的设计思想,指出追求小浪底水库异重流的较高排沙比,是黄河汛前调水调沙极其重要的目标。同时,对入库水沙动力、动力作用时机、库区地形条件等影响小浪底水库异重流排沙比的主要因素进行了分析,建立了排沙比与小浪底水库入库平均输沙率、三门峡水库泄流增峰助力、动力作用时机及库区地形条件的关系式。实践表明:增大小浪底水库的入库水沙动力、把握好动力作用时机、尽可能创造有利的库区地形条件,可以有效地增大小浪底水库异重流的排沙比,实现"1+1>2"的水库减淤效果。
Density currents can be produced in the Xiaolangdi Reservoir,and can be flushed out finally,through a joint operation of three reservoirs of Wanjiazhai,Sanmenxia and Xiaolangdi in the main stream of the Yellow River.One of key objectives of regulating water and sediment in the Yellow River before a flood season is to produce a high efficient ratio of sediment flushing for density currents in the Xiaolangdi Reservoir.Existing studies show that the ratio of sediment flushing in reservoir can be increased effectively by increasing the power of flow and sediment transport and grasping the appropriate time with a suitable condition of bed topography in reservoir.A relationship is presented herein between sediment flushing ratio,mean sediment discharge entering the Xiaolangdi Reservoir,continuous discharge hydrograph with a certain order of magnitude released from the Sanmenxia Reservoir,and bed topography condition.
出处
《人民黄河》
CAS
北大核心
2011年第4期1-2,8,共3页
Yellow River
关键词
异重流
排沙比
水库联合调度
黄河干流
density current
sediment flushing ratio
joint reservoir operation
the Yellow River
