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本文根据管网优化设计年费用最小的原则,结合低压管灌的运行特点,推导出确定管灌管网经济管径的计算公式。为了便于实际应用,同时给出了井灌区管灌典型情况的树状网和环状网管网系数的计算公式。
According to the principle of minimizing the annual cost of pipe network optimization design and combining with the operation characteristics of low pressure pipe irrigation, this paper derives the calculation formula to determine the economic pipe diameter of pipe irrigation network. In order to facilitate the practical application, the formula of the coefficient of tree network and ring network of typical pipe-filling irrigation in well irrigation area is also given.