三峡水库蓄水后铜陵河段演变特点及趋势分析  

Evalution characteristics and trends of Tongling reach after impoundment of Three Gorges Reservoir

作　　者：冯源[1] 王敏[1] 廖小永[1] 刘同宦[1] 

机构地区：[1]长江科学院河流研究所,湖北武汉430010

出　　处：《人民长江》2012年第5期89-92,101,共5页Yangtze River

基　　金：国家自然科学基金青年基金项目(51109011);长科院博士启动基金项目(CKSQ2010074);水利部公益性行业科研专项经费项目(201001007)

摘　　要：长江下游铜陵河段为典型的鹅头型多汊河道,通过对三峡水库蓄水前后该河段水沙特性、深泓线、平面形态和断面冲淤变化的分析,结论表明,受三峡水库运行和上游水土保持工程的影响,该河段上游的大通站来沙量大幅减少,河段内各汊道发生相应的调整。其中成德洲右汊和南夹江汊道冲刷发展,成德洲左汊进口有所淤积,造成成德洲右汊和南夹江汊道分流比逐渐增大,对南夹江的防洪造成不利影响。建议采取适当的治理措施,防止河势向不利防洪和航运方向进一步发展。Tongling reach is a typical goose - head pattern braided channel of the middle and lower Yangtze River, through analysis on flow and sediment characteristics, talweg, morphology and sectional scouring and deposition of the reach before and after impoundment of the Three Gorges Reservoir, the conclusions are achieved as follows： affected by the Three Gorges Reservoir and upstream soil and water conservation projects, the incoming sediment amounts at Datong station of Tongling reach decreases greatly, and each braided channel varies correspondingly; the right branch of Chengde island and Nanjiajiang branch are scoured, but the inlet of left branch of Chengde island is silted, leading to gradual increase of the diversion radio of the right branch of Chengde island and Nanjiajiang branch, and exerting negative impacts on flood control of Nanjiajiang. It is suggested that appropriate control measures should be taken to prevent the negative impacts on flood control and navigation.

关 键 词：蓄水后 河道演变 水沙变化 铜陵河段 三峡水库 

分 类 号：TV147[水利工程—水力学及河流动力学]