ABSTRACT
Channel characteristics in the middle and lower reaches of Yangtze river were complicated and changing, which showed up as mainstream swing frequently, staggered beach moving down significantly, delta and channel change dviolently etc. In this paper, navigation-obstruction in the Jiepai Reach in the middle reach of the Yangtze River and its countermeasures were discussed based on the analysis of the historical riverbed evolution of the Jiepai reach. The general idea of regulating the Jiepai reach is: based on the existing projects, according to the facilitating pattern of main channel and floodplain during the river evolution, appropriate engineering measures can be taken to gradually form efficient patterns between main channel and floodplain phase by phase, which will improve the navigation conditions.
