干支流水库调度对三峡库区香溪河库湾垂线平均流速影响研究  

Influence of Reservoir Regulation on Vertically-averaged Velocity in the Xiangxi Tributary Bays of the Three Gorges Reservoir

作　　者：辛小康[1] 李恩[2] 杨霞[3] 王攀菲 XIN Xiaokang;LI En;YANG Xia;WANG Panfei(Changjiang Water Resources Protection Institute,Wuhan 430051,China;Baoshan Branch of Yunnan Hydrological and Water Resources Bureau,Baoshan 678000,Yunnan,China;Three Gorges Project Construction and Operation Administration,China Three Gorges Corporation,Yichang 443133,Hubei,China)

机构地区：[1]长江水资源保护科学研究所,武汉430051 [2]云南省水文水资源局保山分局,云南保山678000 [3]中国长江三峡集团公司三峡枢纽建设运行管理局,湖北宜昌443133

出　　处：《三峡生态环境监测》2019年第3期18-24,共7页Ecology and Environmental Monitoring of Three Gorges

基　　金：国家重点研发计划（2016YFC0402204,2016YFC0402207）;中国长江三峡集团公司重点科研项目（SXSN/4092）

摘　　要：为探讨三峡库区干支流水库调度对三峡库区香溪河库湾垂线平均流速的影响,评判其抑制水华的可能性,构建了香溪河回水区平面二维水动力学数学模型。考虑三峡水库起调水位、水位变化方式、水位变化幅度、调度持续时间、支流水库下泄流量等水库调度参数,计算了24种工况。结果表明:三峡水库运行调度期间,香溪河回水区流速很小,为10^-3~10^-2 m/s量级。三峡水库单独调度导致水位抬升,流速减小;水位下降,流速增加;但对库湾垂线平均流速的影响效果不显著,按照影响作用的大小排序依次为:起调水位、水位变幅、持续时间。支流古洞口水库增加下泄流量对库湾垂线平均流速影响较显著。In order to study the influence of reservoir regulation on the vertically-averaged velocity in the tribu?tary bays of the Three Gorges Reservoir,and to evaluate possibility of controlling algal bloom with velocity change,a two-dimensional hydrodynamic model was established for the area of the Xiangxi River.24 cases were computed under the consideration of initial water level,changing style and changing amplitude of water level,as well as regulating duration and discharge of tributary reservoir,etc..The results show that the vertically-aver?aged velocity in the backwater area is very small during the operation of the Three Gorges Reservoir with a mag?nitude of 10^-3~10^-2 m/s.The effect of the reservoir regulation on the vertically-averaged velocity is insignificant.When the water level rises,the velocity decreases,and as the water level falls,the flow rate increases.Accord?ing to the importance of these impact factors,the significance order is initial water level,water level changing amplitude and regulating duration.The vertically-averaged velocity can significantly influenced by the discharge of tributary reservoir.

关 键 词：三峡工程 水库 调度 垂线平均流速 水华 

分 类 号：X321[环境科学与工程—环境工程]