荆南河网衰退机理研究  

Research on the decline mechanism of river networks on south bank of Jingjiang river reach

作　　者：姚仕明[1] 张玉琴[2] 王兴奎[1] 

机构地区：[1]清华大学水利水电工程系,北京100084 [2]长江科学院,武汉430010

出　　处：《水力发电学报》2008年第4期54-59,共6页Journal of Hydroelectric Engineering

基　　金：国家科技支撑计划项目(2006BAB05B03);中国博士后科学基金(20070410065)

摘　　要：本文分析了近50年来荆江三口分流分沙的变化规律;从荆江与洞庭湖的演变、下荆江裁弯、葛洲坝和三峡水库的蓄水运用以及城陵矶站水位抬高等方面分析荆南河网衰退的原因。研究结果表明,江湖关系变化调整与三口分流道泥沙淤积是荆南河网衰退的根本原因;下荆江裁弯、洞庭湖面积与容积的减小、葛洲坝和三峡水库的蓄水运用以及下荆江河势控制工程等加速了荆南河网衰退的进程。This paper analyzes the change rules of flow and sediment diversion through three outlets along Jingjiang river reach into Dongting lake in the past 50 years, and studies their decline reasons from various aspects of Dongting lake evolution, lower Jingjiang river stretch cut-off, impoundment of Gezhouba and Three Gorges reservoirs as well as the water level rise at Chenglingji hydrometric station etc. Result indicates that the regulation of relationship change between Yangtze river and Dongting lake and the sediment deposition in floodway channels of three outlets are the primary decline causes of river networks on south bank of Jingiiang river reach ; cut-offs of lower Jingjiang fiver stretch, reduction in area and volume of Dongting lake, regulation of river regime in lower Jingjiang river reach as well as the impoundment of Gezhouba and Three Gorges reservoirs speed up its decline process.

关 键 词：河流动力学 荆南河网 河道演变 衰退机理 

分 类 号：TV133[水利工程—水力学及河流动力学]