针对农业圩区排涝计算方法直接应用于城市圩区易导致排涝流量计算偏小的问题,分析了城市圩区与农业圩区在排涝标准、排涝流程及计算公式等方面的差异,利用表解法探讨了二者排涝计算方法,并基于梯形河道特点对排涝公式进行了改进。实例结果表明,改进的计算方法使城市圩区排涝计算结果更科学合理。 Aiming at the problem that the calculation method of drainage in agricultural polder area is directly applied to the calculation of drainage flow in urban polder area, the differences between urban polder area and agricultural polder area in drainage drainage standard, drainage flow and calculation formula are analyzed. The calculation method of drainage and drainage of the two is adopted, and the drainage and drainage formula is improved based on the trapezoidal channel characteristics. The results of the example show that the improved calculation method makes the result of drainage in urban polder area more scientific and reasonable.