A model based on the exponential function was proposed to predict the velocity fields in partially vegetated channels. Eleven groups of experimental data obtained from this study and the published literature were used to verify the model. The predicted lateral profiles of velocities at different longitudinal positions had good agreement with measurements over wide ranges of flow and vegetation conditions, indicating that the proposed model is capable of predicting the velocity fields in the complicated partially vegetated flows. Combining the proposed model with an existing model that predicts the critical velocity for initiating the resuspension of noncohesive sediment in vegetated regions defined the patch length that would be sufficient to promote sediment deposition within the patch interior. For a sparser patch or finer sediment, a longer patch is required to promote deposition and thus protect beds from erosion.

提出了一种基于指数函数的模型来预测部分植被通道中的速度场。从本研究和已发表的文献中获得的 11 组实验数据用于验证模型。预测的不同纵向位置的速度横向剖面与大范围的流动和植被条件下的测量值具有良好的一致性，表明所提出的模型能够预测复杂的部分植被流动中的速度场。将所提出的模型与预测在植被区域中启动非粘性沉积物再悬浮的临界速度的现有模型相结合，定义了足以促进斑块内部沉积物沉积的斑块长度。对于更稀疏的斑块或更细的沉积物，