Lateral Distributions of Depth-Averaged Velocity in Compound Channels with Submerged Vegetated Floodplains
Lateral Distributions of Depth-Averaged Velocity in Compound Channels with Submerged Vegetated Floodplains
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DOI：
10.4028/www.scientific.net/amm.641-642.288
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发表时间：
2014-09
期刊：
影响因子：
--
通讯作者：
Ming Zhang;Chunbo Jiang;H. Huang
中科院分区：
文献类型：
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作者：
Ming Zhang;Chunbo Jiang;H. Huang
基于考虑植被影响的水深积分N-S方程的解析解，分析了漫滩植被覆盖下复式明渠水深平均流速的横向分布。明渠的情况有：角部有淹没植物的矩形渠道和漫滩有淹没植物的复式渠道。本文提出了一种计算淹没植被漫滩水深平均流速横向分布的方法。该方法是基于一个两层的方法，上面的流量和通过植被层分别描述。本文进行了滩地复河槽淹没植物试验研究。三种情况下的解析解与实验数据进行了比较。相应的深度平均速度分布的分析与实验数据吻合良好。
Lateral distributions of depth-averaged velocity in open compound channels with submerged vegetated floodplains are analyzed, based on an analytical solution to the depth-integrated Reynolds-Averaged Navier-Stokes equation with a term included to account for the effects of vegetation. The cases of open channels are: rectangular channel with submerged vegetated corner, and compound channel with submerged vegetated floodplain. The present paper proposes a method for predicting lateral distribution of the depth-averaged velocity with submerged vegetated floodplains. The method is based on a two-layer approach where flow above and through the vegetation layer is described separately. An experiment in compound channel with submerged vegetated floodplain is carried out for the present research. The analytical solutions of the three cases are compared with experimental data. The corresponding analytical depth-averaged velocity distributions show good agreement with the experimental data.