金沙江下游梯级水库对三峡水库消落期水沙条件的影响  

Influence of lower Jinsha River terrace reservoirs on water and sand conditions ofThree Gorges Reservoir during its waning period

作　　者：苏丽 肖毅[1] 刘辛愉 邵伟峰 SU Li;XIAO Yi;LIU Xinyu;SHAO Weifeng(National Engineering Research Center for Inland Waterway Regulation,Chonging Jiaotong University,Chongqing 400074,China;Chongqing Shipping Engineering Survey and Design Institute of the Yangtze River,Chongqing 401147,China)

机构地区：[1]重庆交通大学,国家内河航道整治工程技术研究中心,重庆400074 [2]长江重庆航运工程勘察设计院,重庆401147

出　　处：《水运工程》2024年第11期134-138,166,共6页Port & Waterway Engineering

基　　金：国家自然科学基金项目(52179059);三峡后续工作科研项目(SXHXGZ-2021-1)。

摘　　要：金沙江下游梯级水库蓄水运行对三峡库区水沙条件产生明显影响,进而引起航道条件的改变。利用实测水沙资料,分析金沙江下游梯级水库对三峡水库消落期水沙条件的影响。结果表明,2015年1—5月向家坝下泄流量增大,平均增幅37%,朱沱站、寸滩站流量也随之增加34%和26%;向家坝站输沙量减少约98%,由占寸滩站沙量比重58%以上减少为1%~5%。水沙条件的改变有利于改善三峡库区航道条件,特别是朝天门以上库尾河段枯水期的航道最小维护水深由1—4月的2.7 m提升至12月的2.9 m,而朝天门以下河段航道条件受向家坝下泄流量的影响相对较小。The water storage operation of the lower Jinsha River terrace reservoirs has an obvious impact on the water and sand conditions in the Three Gorges Reservoir area,which in turn causes changes in the navigation channel conditions.Based on the measured water and sand data,this paper analyzes the impact of the lower Jinsha River gradient reservoirs on the water and sand conditions of the Three Gorges reservoir during waning period.The results show that from January to May 2015,the discharge flow of Xiangjiaba increased by 37%on average,and the discharge at Zhutuo station and Cuntan station also increased by 34%and 26%.The sand transport amount at Xiangjiaba station has decreased by about 98%,from over 58%of the sand amount at Cuntan station to 1%-5%.The change of water and sediment conditions is conducive to improving the channel conditions in the Three Gorges Reservoir area.In particular,the minimum maintenance depth of the channel in the lower reaches of Chaotianmen reservoir increases from 2.7 m in January to April to 2.9 m in December,while the channel conditions in the lower reaches of Chaotianmen are less affected by the discharge flow rate of Xiangjiaba.

关 键 词：三峡水库 消落期 流量变化 输沙量变化 航道 

分 类 号：U611[交通运输工程—船舶及航道工程]