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Ｕ 形渠道已在我国广大灌区大量应用，针对适用于Ｕ 形渠道量水的平底抛物线型无喉段量水槽流量公式计算复杂的问题，文中通过理论分析推导出了简化的量水槽流量计算公式，计算结果与原流量迭代公式比较相对差值＜ ０．５％ ，便于采用抛物线型量水槽的生产单位应用
The U-shaped channel has been widely used in many irrigation areas in China. According to the complicated calculation of the discharge formula of the flat-bottomed parabola without throat for the U-shaped channel, a simplified calculation formula of the volume of the flume is deduced through theoretical analysis. The relative difference between the calculated result and the original flow iteration formula is less than 0.5%, which is convenient for the production unit using the parabola type sink