A positive surge is an unsteady open channel flow motion characterised by a sudden rise in water surface elevation. The literature is focused primarily on rectangular channels. Herein, the free-surface features of positive surges propagating upstream were investigated in an asymmetrical canal. The surge propagation was a three-dimensional unsteady flow motion, resulting in a complicated transient secondary motion compared to positive surge propagating in rectangular canals. The present results may be relevant to surge propagation in man-made trapezoidal canals and natural irregular-shaped channels.

中文翻译：

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在不对称运河中传播的正浪涌

正涌动是不稳定的明渠水流运动，其特征是水面高度突然上升。文献主要集中在矩形通道上。在此，研究了在不对称运河中向上游传播的正浪涌的自由表面特征。浪涌传播是三维非定常流动运动，与在矩形渠道中传播的正浪涌相比，导致复杂的瞬态二次运动。目前的结果可能与人工梯形渠道和自然不规则形状的渠道中的浪涌传播有关。