本文提出明渠流中柔性水草的阻力公式,建立其明渠流速场、应力场运动方程式。分析表明:底部有柔性水草的二维明渠流的水流特性问题可用隐式条件的一阶常微分方程来表达,且可用摄动法求其解,所得结果与实验值基本吻合。 In this paper, the resistance formula of flexible aquatic plants in open channel flow is proposed, and the equation of motion of flow field and stress field in open channel is established. The analysis shows that the flow characteristics of two-dimensional open channel flow with flexible aquatic plants can be expressed by the first order ordinary differential equation with implicit conditions, and can be solved by the perturbation method. The obtained results are in good agreement with the experimental values.