三峡工程运用后荆江与洞庭湖关系变化分析  

Change in relationship of Jingjiang river and Dongting lake after operation of Three Gorges Project

作　　者：渠庚[1,2] 郭小虎[2] 朱勇辉[2] 刘亚[2] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,武汉430072 [2]长江科学院水利部江湖治理与防洪重点实验室,武汉430010

出　　处：《水力发电学报》2012年第5期163-172,共10页Journal of Hydroelectric Engineering

基　　金：水利部水利前期项目:三峡工程运用初期荆江河道演变与治理研究(QQ0871/HL15);水利部公益性行业专项:大型水利枢纽工程下游河型变化机理研究(2007SHZ1-3)

摘　　要：本文利用三峡工程蓄水以来的实测资料,从荆江河段水位、荆江三口分流分沙比以及城陵矶水位变化等三方面阐述了荆江与洞庭湖关系的变化,得到以下认识:三峡工程蓄水以来上荆江河段中、低流量下水位有一定程度下降,大流量下水位基本变化不大,而下荆江河段同流量下水位略有下降;荆江三口分流分沙比无明显变化趋势;城陵矶在干流同流量下水位下降幅度较小;但三峡水库的调蓄作用将会导致荆江河段水位、荆江三口分流以及城陵矶水位在中枯水期发生一定的调整,并在此基本上预测三峡工程蓄水后荆江与洞庭湖关系将基本维持现有的格局。This article uses field data at the operation stage of Three Gorges reservoir to demonstrate changes in the relationship of the Jingjiang river and the Dongting lake caused by the reservoir impounding, in terms of water level responses in Jingjiang reach, changes in the runoff ratios of three Jingjiang-Dongting diversions, and water level responses at the Chenglingji station. Results show that in the upper Jingjiang, medium and low water levels have been lowered to some extent, while high level varied little. Similar responses in low water condition include a slight adjustment in the lower Jingjiang~ water level, little responses in the flows of three diversions, and a slight falling in the Chenglingji^s water level. During medium and lower water periods, however, the reservoir storage caused changes in all the three factors above. In summary, the river-lake relationship considered will maintain the present pattern at the Three Gorges operation stage.

关 键 词：水沙动力学 变化 分析 荆江与洞庭湖关系 

分 类 号：TV147[水利工程—水力学及河流动力学]