三峡水库运用对鄱阳湖调蓄能力的影响  

Impact of the Three Gorges Reservoir on the storage capacity of Poyang Lake

作　　者：范少英 邓金运[2] 王小鹏 张冉 FAN Shaoying;DENG Jinyun;WANG Xiaopeng;ZHANG Ran(Yellow River Hydropower Development Corporation,Jiyuan 459017,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,China;Yellow River Engineering Consulting Co.,Ltd.,Zhengzhou 450003,China)

机构地区：[1]黄河水利水电开发总公司,河南济源459017 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]黄河勘测规划设计研究院有限公司,河南郑州450003

出　　处：《水科学进展》2019年第4期537-545,共9页Advances in Water Science

基　　金：国家重点研发计划资助项目(2018YFC0407201)~~

摘　　要：鄱阳湖调蓄能力受“五河”(赣江、抚河、信江、饶河、修水,以下简称五河)及长江干流的双重影响,三峡水库运用后,干流水文情势变化影响鄱阳湖与长江之间的水量交换。基于实测资料统计和湖口出流影响因素分析,建立了一种新的鄱阳湖出流及临界调蓄水位的计算公式,进而对三峡水库运用前后鄱阳湖各月调蓄水量的变化情况进行了定量分析。研究结果表明,长江干流和五河来流通过改变星湖落差和湖口水位来影响湖口出流及湖泊调蓄水量,但影响过程及影响量有所差异,若湖口水位不变,五河入流每增加1000m^3/s,湖口出流约增加304m^3/s,九江流量每增加1000m^3/s,湖口出流约减小723m^3/s。三峡水库运用会改变湖泊调蓄水量,年内各月相比,9月鄱阳湖水量减小约49.4%,5月鄱阳湖水量增加约47.7%。The storage capacity of Poyang Lake is influenced by the flow from the main stream of the Yangtze River and five rivers in the Poyang Lake basin.After the Three Gorges Dam(TGD)went into operation,hydrological changes in the main stream of the Yangtze River impacted water exchange between the river and Poyang Lake.Based on the analysis of measured data and factors influencing outflow at Hukou station,empirical formulas describing outflow at Hukou station and critical water level for lake storage capacity was established.The change in lake storage capacity in the months before and after the construction of the TGD was then analyzed quantitatively.The results show that the flows from the main stream of the Yangtze River and the five rivers in the Poyang Lake basin affected outflow and water storage capacity by changing the water level difference between Xingzi and Hukou stations and by changing the water level at Hukou station.But the Yangtze River and the five rivers in Poyang Lake basin dirrered in process and degree.Given no change in the water level at Hukou station,when the flow from the lake basin increased by 1 000 m^3/s,the outflow increased by 304 m^3/s.When the flow from the main stream of the Yangtze River increased by 1 000 m^3/s,the outflow decreased by 723 m^3/s.In addition,the TGD already had an impact on the water storage capacity of Poyang Lake.The water volume of Poyang Lake decreased 49.4%in September,but increased 47.7%in May.

关 键 词：水位流量关系 湖泊调蓄 水量交换 三峡水库 

分 类 号：TV143[水利工程—水力学及河流动力学]