本文讨论了按年费用最小原则确定排灌泵站经济管径的数解方法及其寻优步骤,给出了非常简单的计算年耗电费用公式,剔除了图解方法全部绘图的繁琐过程,既计算简单又提高了结果精度,大大降低了设计人员的工作量,使按年费用最小原则确定经济管径的方法真正具有了实用价值。 In this paper, we discuss the numerical solution method and optimization steps of determining the economic pipe diameter of irrigation and drainage pumping stations according to the annual minimum cost principle, and give a very simple formula to calculate the annual power consumption cost, excluding the tedious process of drawing all the drawings. Simple and improve the accuracy of the results, greatly reducing the workload of designers, so that the principle of the annual cost of the minimum principle of determining the economic path really has practical value.