According to the longitudinal equation of flow movement in channel bends, the theoretical formula of depth-averaged longitudinal velocity distrbution is established.
根据弯道水流纵向运动方程，提出了弯道水流纵向垂线平均流速计算公式。
In this paper, a differential equation of describing the lateral distribution of depth averaged velocity is obtained by simplifying 2d shallow water equations of open channel flow.
通过简化宽浅明渠二维水流运动方程，得到垂线平均流速在横向变化的微分方程序。
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