长江流域资源与环境 >> 2019, Vol. 28 >> Issue (10): 2471-2483.doi: 10.11870/cjlyzyyhj201910019

• 生态环境 • 上一篇    下一篇

三峡水库运行下长江与洞庭湖交汇区水情态势及相互顶托作用

段蕴歆1,2,李景保1,吕殿青1,王丹阳1,代稳1,刘雯1   

  1. (1.湖南师范大学资源与环境科学学院,湖南 长沙 410081;2.北京大学城市与环境学院,北京 100871)
  • 出版日期:2019-10-20 发布日期:2019-11-05

Hydrological Conditions and the Mutual Supporting Effects at the Intersection Area of Dongting Lake and Yangtze River Under the Operation of the Three Gorges Reservoir

DUAN Yun-xin1,2, LI Jing-bao1,LV Dian-qing1,WANG Dan-yang1, DAI Wen1, LIU Wen1   

  1. (1.College of Resources and Environmental Sciences, Hunan Normal University, Changsha 410081,China;
    2.College of Urban and Environmental Sciences, Peking University, Beijing 100871, China)

  • Online:2019-10-20 Published:2019-11-05

摘要: 基于1990~2017年监利、城陵矶、螺山3站水位及流量数据,采用差值法、流量距平法、相关系数分析法,分析三峡水库运行下长江与洞庭湖交汇区的水情态势及相互顶托作用。与三峡水库运行前比较:(1)三峡水库不同调度方式运行后在不同流量、水位下江湖交汇区的监利、城陵矶、螺山3站水位流量均有所变化,调洪期3站在不同流量下水位降幅均大于0.50 m,不同水位下流量减幅均超过2 000 m3/s,补水期流量增加幅度均在1 000 m3/s以上,水位上升幅度都在0.50~1.00 m之间;(2)三峡水库全程调度运行后监利、城陵矶、螺山3站之间的水位流量相关系数在0.50~0.96之间,相关系数提升0.1~0.35, 表明交汇区水位流量相互顶托作用均呈减弱状态;(3)三峡水库在预泄、调洪、蓄水、补水4个调度时段中,监利、城陵矶、螺山3站调洪期和补水期相关系数变动幅度分别为0.04~0.35和0.1~0.39,预泄期和蓄水期的相关系数变动幅度分别为0.01~0.1和0.005~0.4,总体上江湖交汇区的水文相互顶托强度有所减弱。

Abstract: Based on the water level and flow data of Jianli, Chenglingji and Luoshan stations from 1990 to 2017, this article analyzed the hydrological conditions and the mutual supporting effects of the intersection area between The Dongting Lake and the Yangtze River under the operation of the Three Gorges Reservoir by using the methods of difference, flow anomaly and correlation coefficient analysis. Compared with the pre-operation of the Three Gorges Reservoir we have the following results: (1) The water level and flow of Jianli, Chenglingji and Luoshan stations in the river-lake junction area have changed after the operation of the reservoir under different flow and water level. The water level decreases more than 0.50 m under different flow rates, more than 2 000 m3/s in the different water levels during the pre-discharge period, more than 1 000 m3/s in the different water levels in the recharge period. The rising range of water level is between 0.50-1.00 m; (2)After the operation of the Three Gorges Reservoir, the correlation coefficients between river level and flow at all the three stations are between 0.50-0.96; and the correlation coefficients are increased by 0.1 to 0.35, which indicates that the mutual supporting strength between water level and flow in the intersection area is weakened.  (3) In the four operation periods of pre-discharge, discharge, water storage and low flow of the Three Gorges Reservoir, the variation ranges of correlation coefficients of Jianli, Chenglingji, Luoshan during flood diversion and recharge periods are 0.04-0.35 and 0.1-0.39 respectively, the variation ranges of correlation coefficients between pre-discharge period and impoundment period are 0.01-0.1 and 0.005-0.4, respectively. Generally, the strength of hydrological mutual support in the river-lake junction area is weakened.

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