ON THE CHARACTERISTICS OF FLOW MOVEMENT IN THE BENDING AND BIFURCATED RIVER

摘要：

The bending and bifurcated river is one kind of braided river, this river pattern has the evolution characteristics of both bending and bifurcated river, so its evolution is complex.Although each reach has its own specialty, but all follows the identical basic rule of current movement and adjustment to scouring and silting of rive bed. This paper takes the example of the reach of Yangtze river in Yidu, which is a typical shallow-water bending and bifurcated reach, uses CCHE2D numerical model to simulate the water movement of Yidu reach, and analyzes the water movement charicteristics of Yidu reach based on the simulation result. The variation of the velocity distribution of flow and the local water surface longitudinal slope along the distance and with the change of water discharges is ananlyzed. At last, The position of dynamic axis of flow of bending and bifurcated reach with different discharges is ananlysed.

关键词： bifurcated river flow movement channel scouring and silting dynamic azis of flow

作者: Jia Zhuang Jiong Zhang Dong Huang Guodong Zheng Guanwen Lai

作者单位: Guangdong Research Institute of Water Resources and Hydropower, Guangzhou, China Pearl River Hydraulic Institute, Pearl River Water Resources Commission, Gnangzhou, China

会议类型: 国际会议

会议名称: 第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)

会议地点: 南京

会议语种:英文

页码: 859-864

在线出版日期: 2008-10-20（万方平台首次上网日期，不代表论文的发表时间）