不同水库干支流水体交换差异及成因分析  

Analysis of differences and causes of water exchange between mainstream and tributaries in different reservoirs

作　　者：马金川 杨正健[2] 程豹 唐咏春 官卓宇 MA Jinchuan;YANG Zhengjian;CHENG Bao;TANG Yongchun;GUAN Zhuoyu(Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China;College of Hydraulic and Environmental Engineering, China Three Gorges University, Yichang 443002, China)

机构地区：[1]湖北工业大学河湖生态修复及藻类利用湖北省重点实验室,湖北武汉430068 [2]三峡大学水利与环境学院,湖北宜昌443002

出　　处：《武汉大学学报（工学版）》2019年第10期862-869,共8页Engineering Journal of Wuhan University

基　　金：国家重点研究计划项目（编号：2016YFC0402204）;国家自然科学基金项目（编号：51879099,91647207,51779128）

摘　　要：基于2018年3月19日小黑江库湾及糯扎渡水库干流水流、水温、浊度、电导率等监测数据,分析了糯扎渡水库小黑江库湾水动力特征及其成因,并与三峡水库香溪河库湾水动力特性进行对比分析.结果表明:糯扎渡水库干流水体从库湾表层和底层同时倒灌进入库湾,小黑江上游来流从库湾中层流向库湾下游;干支流水温差异决定了小黑江库湾分层异重流的形成过程.上游来流与库湾的水温差异是导致小黑江库湾上游来流和香溪河库湾上游来流以不同形式流出库湾的主要原因;干流水体水温分层结构的差异是导致糯扎渡水库干支流和三峡水库干支流水体倒灌形式不同的主要原因.Based on the monitoring data of water flow, water temperature, turbidity and conductivity at 4 sites in Xiaohei Bay and 1 site in the mainstream of Nuozhadu Reservoir on March 19, 2018, the hydrodynamic characteristics and their causes of Xiaohei Bay in Nuozhadu Reservoir are analyzed;and then the hydrodynamic characteristics of Xiangxi Bay in Three Gorges Reservoir are compared. The results show that the mainstream of Nuozhadu Reservoir simultaneously intruded into Xiaohei Bay from the surface and bottom layers of the reservoir bay, and the upstream inflow of Xiaohei River flowed in the middle layer to the downstream. The water temperature differences between the mainstream and tributary of Xiaohei River determined the formation of density currents. The phenomenon that the upstream inflow flowed into the mainstream in different ways in Xiaohei Bay and Xiangxi Bay is caused by the water temperature differences between the upstream inflow and the tributary bay. Different reverse density currents of tributary bays in Nuozhadu Reservoir and the Three Gorges Reservoir are caused by the differences of water temperature stratification structures in the mainstreams.

关 键 词：糯扎渡水库 小黑江库湾 三峡水库 香溪河库湾 异重流 水温差 水温分层结构 

分 类 号：TV213[水利工程—水文学及水资源]