摘要
水流漫滩后,主槽流速减小,滩地流速增大,但主槽流速大,滩地流速小,滩槽之间流速的差别使滩槽交界面上产生剪切力,两部分水流在交界面上发生动量交换,滩槽交界面产生大量次生流、旋涡,并伴随着大量的能量耗散。滩槽的边壁切应力分布不均,尤其是滩槽交界面处。流速和切应力不均匀分布导致了主槽水流含沙量降低,滩地水流含沙量升高。从五方面对漫滩水流特征的研究成果作简要概述。
Velocity of flow in main channel decreases, while that over floodplain increases after the flood flowed over floodplain. The velocity of flow in channel is greater than that over floodplain. The differences of them cause the shear stress in the demarcation between the main channel and the floodplain. There is a consider amount of energy loss because of eddies in the demareation area. The shear stress in main channel and that on floodplain are not homogeneous. This induces different sediment concentration, There are five aspects in this paper to summarize the study achievement of the flood plain flow charaeteristics.
出处
《水利科技与经济》
2005年第9期524-525,共2页
Water Conservancy Science and Technology and Economy
关键词
漫滩水流
水流特征
能量耗散
泥沙输移
flood plain flow
flow characteristics
energy dissipation
sediment transport
