农田灌溉水有效利用系数测算分析--以甘肃省平凉市为例

Calculation and Analysis of Effective Utilization Coefficient of Farmland Irrigation Water-Take Pingliang City,Gansu Province as an Example

以甘肃省平凉市为例,从28个中、小型灌区中,选择符合要求的泾河灌区、泾庆灌区、汭河灌区、水洛河灌区、黎明川灌区等5个样点灌区,采用“首尾测算法”计算平凉市2020年各类型各规模灌区的农田灌溉水有效利用系数。结果为:一类中型(面积5~15万亩)灌区农田灌溉水有效利用系数为0.5490,二类中型(面积1~5万亩)灌区农田灌溉水有效利用系数为0.5520,小型(面积0.01万亩~1万亩)灌区农田灌溉水有效利用系数为0.5570,平凉市2020年农田灌溉水有效利用系数为0.5520。测算结果对平凉市水资源规划利用具有一定的指导作用。

This paper takes Pingliang City,Gansu Province as an example.From 28 small and medium-sized irrigation districts,five sample irrigation districts including Jinghe Irrigation District,Jingqing Irrigation District,Shuhe Irrigation District,Shuiluo River Irrigation District and Limingchuan Irrigation District are selected to meet the requirements.The"front-end measurement algorithm"calculates the effective utilization coefficient of farmland irrigation water of various types and sizes of irrigation districts in Pingliang City in 2020.The results are:the effective use coefficient of farmland irrigation water in the first-class medium-sized irrigation area is 0.5490,the effective use coefficient of farmland irrigation water in the second-class medium-sized irrigation area is 0.5520,and the effective use coefficient of farmland irrigation water in the small-scale irrigation area is 0.5570.The effective utilization coefficient of farmland irrigation water in Pingliang in 2020 is 0.5520.The calculation results have a certain guiding effect on the planning and utilization of water resources in Pingliang City.