Fluvial processes in Middle Yangtze River after impoundment of Three Gorges Project
The Three Gorges Project (TGP) is the key project for the development of Yangtze River Basin. In this paper, based on the analysis of the water flow and sediment change downstream the TGP after the impoundment and the measured topography from Yichang to Hukou, the river regime change in this reach after the impoundment of the TGP is studied. The conclusion indicates that after the impoundment of the TGP,the scouring degree along the downstream channel were increased, and the character of the scouring was that the shoal and the principal channel were scoured simultaneously,although before the impondment of the TGP,the shoal was always in deposition. Along with the reduction in sediment load from the upstream, firstly, distinct vertical scouring from Yichang to Zhicheng happened, and the riverbed was coarsened expressly. Secondly, in the Jingjiang reach, the channel has been developed to narrow and deep form. Thirdly, in some parts of the curved reach from Chenglingji to Hukou, the principal flow swayed and the bank collapsed frequently in concave banks.
Three Gorges ProjectMiddle Yangtze Riverfluvial processes
国家科技期刊平台
NSTL
万方数据
维普
