中文摘要：

本文根据太浦闸自1991年开闸泄水以来积累的实测水文资料，利用《水闸设计规范》中的两个公式对太浦闸泄流量进行计算，与实测泄洪流量相比，公式一的计算值偏大许多，公式二的计算值往往偏小。文中应用三次多项式对由实测泄洪流量推得的堰流流量系数进行了拟合，得出了比较适合太浦闸运行情况下的堰流流量系数计算公式。

英文摘要：

The water discharge capacity of Taipu gate has been studied using the measured hydrologic data accumulated since 1991 when it first operated. Compared with measured discharges, the discharge flows calculated by formula one （listed in ＂design specification of water gates＂） are over-predictions, while the calculated values by formula two are normally under-predictions. The main reason is that discharge coefficients of weir flow （m＇） derived from measured data using formula one are much less than the value of 0. 385, while compositive discharge coefficients （μ0） derived from measured data using formula two are normally higher than the values recommended in the design specification. Finally, one more suitable formula to compute the discharge coefficient of weir flow has been obtained through matching discharge coefficients of weir flow derived from measured data using a cubic polynomial.