This paper proposes a model for predicting the longitudinal profiles of streamwise velocities in an open channel with a model patch of vegetation. The governing equation was derived from the momentum equation and flow continuity equation. The model can estimate the longitudinal profiles of velocities both inside and outside a vegetation patch. Laboratory experiments indicate that the longitudinal profiles of velocities inside a patch and in the adjacent bare channel have the same adjustment distance in the longitudinal direction, but the profiles have different trends because the vegetation drag drives the flow from the patch to the adjacent bare channel. The model considers different dimensionless parameters in two flow adjustment regions upstream of and inside the patch. Sixteen sets of experimental data from different sources are used to verify the model. The model is capable of modeling the longitudinal profiles of velocities inside and outside patches of cylinders or cylinder-like plants. Compared to a previous model, the current model improves the modeling accuracy of longitudinal profiles of velocities.

本文提出了一个模型，该模型用于预测带有植被模型的明渠中水流速度的纵剖面。控制方程是从动量方程和流动连续性方程导出的。该模型可以估计植被斑块内部和外部的速度纵向分布。实验室实验表明，斑块内部和相邻裸露通道的速度的纵向轮廓在纵向方向上具有相同的调整距离，但是这些轮廓具有不同的趋势，因为植被阻力驱动了从斑块流向相邻裸露通道的流动。该模型在贴片上游和内部的两个流量调节区域中考虑了不同的无量纲参数。来自不同来源的16组实验数据用于验证模型。该模型能够对圆柱体或圆柱状植物的内部和外部斑块内部和外部的速度的纵向轮廓进行建模。与以前的模型相比，当前模型提高了速度纵向轮廓的建模精度。