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中文摘要：
针对滩地植被化的复式断面河道的水流特性，从沿水深积分的紊流时均运动微分方程出发，基于恒定均匀流的假设，给出了植被作用下河道水流水深平均流速沿横向分布的二维解析解．其中，将植被对水流的影响归结为拖曳力项，在模型中计及了二次流的影响，并对二次流强度系数K的取值进行了初步探讨．分别对顺直河道横断面和蜿蜒河道的顶点断面进行了计算，计算结果与试验资料符合良好，表明给出的二维解析解可用于植被作用下复式断面河道水流水深平均流速沿横向分布的数值预报．
英文摘要：
A 2-D analytical solution for compound channel flows with vegetated floodplains is presented. For steady uniform flow, the depth-integrated N-S equation was used for analysis. The effects of the vegetation were considered as the drag force item. The secondary currents were also taken into account in the governing equations and preliminary estimation of the secondary current intensity coefficient K was discussed. Predicted results for the straight channels and apex cross-section of meandering channels agree well with the experimental data, which shows that the analytical model presented here can be applied to predict the flow in compound channels with vegetated floodplains.
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