复式河道漫滩水流计算方法研究

对复式顺直河道和复式游荡型河道中漫滩洪水的计算方法进行了研究.其中，对复式顺直河道，从Shiono-Knight方法出发，将二次流项归并入雷诺切应力项，并将主槽和滩地的流速分布曲线直接相接，推导出一套不需联立求解系数方程组的漫滩水流流速和床面切应力分布的计算公式以及床面平均切应力的解析计算公式；对复式游荡型河道，建立了一种新的上层水流计算方法.文中的计算结果与前人的实验资料基本一致，初步表明文中的方法是合理的.

Study on computational method of overbank flow in channels with compound cross section

The calculation methods for overbank flow in straight channel and meandering channel with compound cross section are studied respectively. Based on the Shiono & Knight Method, a set of formulae is established for straight channels to calculate the velocity profiles and riverbed shear stress of overbank flow. The secondary current term and the Reynolds stress term are combined into one term and the velocity profiles in main channel and in flood plain are linked directly. No solution of coefficient equation is needed. For meandering channel, a simplified calculation method for upper layer flow is established. The computational results are compared with the experimental data obtained by other authors. Good agreements are attained.