Liu L.,Planning Design and Research Institute of the Yangtze River Channel |
Huang C.,Planning Design and Research Institute of the Yangtze River Channel |
Li M.,Planning Design and Research Institute of the Yangtze River Channel |
Zhang M.,Planning Design and Research Institute of the Yangtze River Channel
Yingyong Jichu yu Gongcheng Kexue Xuebao/Journal of Basic Science and Engineering | Year: 2014
Staggered beach evolution process was effected by hydrodynamic condition, sediment discharge, boundary condition, beach and channel distribution. These factors had made the regime evolution of the straight reach complicated. In a case study of Jiepai Reach, we analyzed the evolution mechanism of straight reach channels. Based on river morphology and sediment transport characteristics, the staggered beach evolution characteristics had been analyzed. The evolution mechanism including hydrodynamics mechanism, sediment transport mechanism, boundary condition had been researched. Many factors that effected the staggered beach evolution had been studied, including the runoff and sediment change before and after the impoundment the three gorges reservoir, the river regulation project. The results showed that the periodic evolution of staggered beach and the straight section shape in Jiepai Reach will continue in the future, nevertheless the periodic time will become longer. It indicated that we should take more consider of time point as well as space point in our future project plans.