长江科学院院报Issue(3)：1-4,47,5.DOI:10.11988/ckyyb.20141008
陆溪口鹅头分汊河段冲淤调整分析
Evolution of Goose-head Braided Channels in Luxikou Reach
摘要
Abstract
Luxikou reach is a typical goose⁃head braided channel in the middle and lower reaches of Changjiang River. Before the impoundment of the Three Gorges Project, channel evolution shows periodic tendency due to flow deflecting caused by single⁃side node in inlet of channel and bend circulation effect. After the impoundment, the e⁃volution regularity of scouring and silting changes under the influences of water and sediment in upper reach and human activities. According to theoretic analysis and measured data, we carry out research the periodic evolution of Luxikou goose⁃head braided reach. The results show that periodic evolution still exists, and adjustment of scouring and silting even speeds up due to the decrease of incoming sediment from upstream. Furthermore, the head of Xinzhou sandbar suffers severe erosion, and erosion ditch occurs. Meanwhile, sediment deposition is serious in the inlet of Zhigang, which leads to adjustment of flow distribution pattern and bad channel condition. After the imple⁃mentation of artificial waterway engineering, the river regime gradually tends to be stable , but the inherent effect on cyclical evolution of river reach still exists, bringing out a negative effect on navigation conditions and regulation projects.关键词
陆溪口鹅头分汊河段/河床演变/周期性/冲淤调整/机理研究Key words
goose-head braided channels in Luxikou reach/evolution of river bed/periodicity/adjustment of scou-ring and silting/mechanism study分类
建筑与水利引用本文复制引用
闫霞,陈立,姚仕明,金中武,邓彩云..陆溪口鹅头分汊河段冲淤调整分析[J].长江科学院院报,2016,(3):1-4,47,5.基金项目
国家自然科学基金项目 （）
