当泄水建筑物的堰顶设有闸门或胸墙时,在泄流过程中常不可避免出现孔堰流过渡问题。本文根据临界水深通过堰顶假设,导出了由堰流向孔流过渡的理论界限表达式:■………(1)式中 e为闸门开度,H为堰顶水头,β为临 When the weir roof of a drainage building has a gate or chest wall, the transition of the weir flow will inevitably occur during the discharge process. Based on the assumption that the critical water depth passes through the weir top, the theoretical boundary expression for the transition from the weir to the hole flow is derived: ■ (1) where e is the opening of the gate, H is the top of the weir, β is Pro