水科学进展2017，Vol.28Issue(3)：321-328,8.DOI:10.14042/j.cnki.32.1309.2017.03.001
复式河道滩槽交互区水沙运动机理
Water-sediment movement mechanism in the troughinteractive region of compound channels
摘要
Abstract
Trough-based compound channels are not only the most common morphology of alluvial rivers, they are also the most important content of river dynamics research.In this paper, based on the generalization experimental data of compound channel and regional characteristics of water-sediment movement, and in combination with four regions of trough-based compound sections, i.e.the main channel equilibrium region, trough interactive region, floodplain equilibrium region and side wall region, the trough interactive region with the most complicated river flow morphology is further divided into two parts, i.e.the logarithmic velocity zone (inner zone) and non-logarithmic velocity zone (external zone).The S-shaped curve describing the animal and plant growth process is introduced so as to propose the determination method of the inner-external zone boundary.Based on the lateral distributional formula of the trough interactive region through linear assumption and integral transform, the calculation equations of sectional average velocity and sediment content in the trough interactive region are given in order to perform comparative analysis on the differences in the velocity and sediment content in different regions.In this paper, the proposed trough region boundary and calculation method of water-sediment distribution will provide technical support for trough planning and governing of compound channels.关键词
水沙运动/复式河道/主槽/滩地/水流流速/含沙量Key words
flow and sediment movement/compound channels/main channel/flood plain/flow velocity/sediment concentration分类
建筑与水利引用本文复制引用
吉祖稳,胡春宏..复式河道滩槽交互区水沙运动机理[J].水科学进展,2017,28(3):321-328,8.基金项目
水利部公益性行业科研专项经费资助项目(201401002) （201401002）
黑龙江省应用技术研究与开发计划项目(GZ16B011)The study is financially supported by the National Non-Profit Research Program of China(No.201401002). （GZ16B011）
