一、过流计算问题我省平原河道,一般纵坡较缓。由于过闸单宽流量的限制和保留水头的要求,不可能出现较大的过闸水面跌落。因而,平原河道无坎平底闸的过流状态,多属淹没式宽顶堰流。由于各计算公式的推导条件不尽一致,致使计算值、计算值与观测值之间,出现较大的差异。目前,各工 First, the problem of over-flow calculation I plain plains rivers, generally gentle longitudinal slope. Due to the single-gate flow rate limit and the head reservation requirements, there is no possibility of a large water level drop across the gate. Therefore, the overcurrent condition of the plain channel with no flat bottom gate is mostly submerged wide crest weir flow. Due to the different derivation conditions of the calculation formulas, there is a big difference between the calculated value, the calculated value and the observed value. At present, all workers