摘要
金沙江下游分布有在建和已建四大梯级水库,其入、出库水沙特征不仅会影响梯级水库自身的运行,也会极大程度地改变下游三峡水库入库水沙条件。以金沙江下游干支流主要控制站水文、泥沙资料分析为基础,揭示了金沙江下游水沙变化特征及其影响。研究结果表明,金沙江下游水沙异源,中游及干流梯级相继建成运用后,下游沙量大幅度减少,对梯级水库库区及坝下游泥沙冲淤、三峡入库沙量影响显著。
Four cascade hydropower stations,named Wudongde,Baihetan,Xiluodu and Xiangjiaba respectively,are located on the lower Jinsha River. Variations of runoff and sediment in Jinsha River will not only play important role in sediment deposition of these four cascade hydropower stations,also surely change the inflow water and sediment of Three Gorges Reservoir. Based on amount of field data of runoff and sediment in lower Jinsha River,characteristics of runoff and sediment variations are studied. The results indicate that the main areas to provide flow and sediment is quietly different in the lower Jinsha River. The sediment discharge in the lower Jinsha River reduced sharply after the operation of cascade hydropower stations in the middle Jinsha River,which will undoubtedly influence the deposition of Xiluodu and Xiangjiaba Reservoir,and induce scour to downstream of the Xiangjiaba power station,correspondingly the sediment inflow of Three Gorges Reservoir will decline.
出处
《泥沙研究》
CSCD
北大核心
2016年第5期20-27,共8页
Journal of Sediment Research
基金
国家重点研发计划项目(2016YFC0402301)
水沙科学与水利水电工程清华大学国家重点实验室项目(2013-ky-1)
关键词
金沙江下游
水沙条件
梯级水库
水土保持
lower Jinsha River
runoff and sediment
cascade hydropower stations
water and soil conservation
