三峡水库试验性蓄水后荆江三口分流变化  

Changes in water diversion capacity at three outlets of Jingjiang River after impoundment of Three Gorges Reservoir

作　　者：魏轩 刘瑜 胡家彬 WEI Xuan;LIU Yu;HU Jiabin(Jingjiang Bureau of Hydrology and Water Resources Survey,Changjiang Water Resources Commission,Jingzhou 434020,China)

机构地区：[1]长江水利委员会水文局荆江水文水资源勘测局,湖北荆州434020

出　　处：《人民长江》2020年第8期99-103,共5页Yangtze River

摘　　要：为进一步了解2008年三峡水库试验性蓄水后荆江三口分流的变化及趋势,在1956~2007年研究成果的基础上,利用2008~2017年的实测资料,详细分析了在三峡水库试验性蓄水后荆江三口年均径流量、月均流量以及断流天数等各方面的变化。结果表明:随着三峡工程的调蓄作用日渐稳定,同时由于上游来水偏少,使得三口各个口门的冲淤变化不大;荆江三口的分流比基本保持小幅度并大致同步的下降变化。研究成果可为长江中游水资源规划治理及江湖关系深入研究等提供参考。In order to further understand changes and trends of water diversion capacity at three outlets of Jingjiang River after impoundment of Three Gorges Reservoir since 2008,on the basis of existing research results from 1956 to 2007,we adopted measured data from 2008 to 2017 to analyze changes in annual runoff,average monthly flow and dry-up days at three outlets of Jingjiang River.The results showed that due to less flow from upstream,the scouring and silting at Three outlets of Jingjiang River had not changed much as the regulation of Three Gorges Project entering a stable period.Besides,diversion ratio of each outlet of Jingjiang River all showed slight decline trend.The results could provide technical support for the planning and management of water resources in the middle reaches of the Yangtze River and the in-depth study of the relationship between rivers and lakes.

关 键 词：荆江三口 分流比 年均径流量 月均流量 三峡水库 

分 类 号：TV697[水利工程—水利水电工程]