摘要
水库泥沙的冲淤总是根据来水来沙条件,对河槽进行调整,改变水流挟沙能力,使河槽适应来水来沙条件,达到不冲不淤的平衡状态。三岔水电站取水工程布置在一急弯河段下游的微弯段凹岸,通过物理模型试验对该取水河段的水沙运动特性进行研究,结果表明:来流量的变化对弯道水流流态及泥沙淤积输移路径的影响很大。河道下泄大流量时水流主流及泥沙输移路径远离取水口侧,随流量的减小水流主流及泥沙输移逐步向取水口门前偏移,表明特大洪水对取水口的危害反而比中小洪水要小。说明该类弯道凹岸取水工程要特别注意来沙较大的中小洪水。这一结果对类似的弯道取水工程布置有重要的参考价值。
Reservoir sediment scour always according to the incoming water and sediment conditions,to adjust the channel,the change of sediment carrying capacity of the channel,to adapt to the conditions of incoming water and sediment reached equilibrium state and not flush.Station water intake project arranged in micro bend concave downstream river bends Sancha hydropower is studied in this paper,the water and sediment movement characteristics of the river water through physical model test,the results show that the change of flow in curved channel flow pattern and sediment transport path,river discharge flow path of flow and sediment transport in the mainstream away from the intake side,with the flow rate of reducing water flow and sediment transport in the mainstream gradually to the water intake gate offset,that harm to the flood on water intake rather than small to medium and small flood.For water projects should pay special attention to the class of concave curve to large medium and small flood sediment.This result has important reference value for the layout of water intake project in similar bend.
作者
史学伟
彭清娥
丁祖寒
Shi Xue-wei;Peng Qinge;Ding Zu-han
出处
《吉林水利》
2018年第7期1-3,6,共4页
Jilin Water Resources
基金
国家重点研发计划资助项目(2016YFC0402302)
关键词
水沙条件
低闸坝
弯道取水
水沙运动规律
water and sediment conditions
Low head Dams
water intake of artificial bend
