%0 Journal Article
%A YAN Xia
%A CHEN Li
%A YAO Shi-ming
%A JIN Zhong-wu
%A DENG Cai-yun
%T Evolution of Goose-head Braided Channels in Luxikou Reach
%D 2016
%R 10.11988/ckyyb.20141008
%J Journal of Yangtze River Scientific Research Institute
%P 1-4
%V 33
%N 3
%X 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 evolution 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 implementation 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.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20141008