2019年广西农田灌溉水有效利用系数测算分析研究

Calculating analysis of effective utilization coefficient of Guangxi farmland irrigation water in 2019

农田灌溉水有效利用系数是评价灌区灌溉水利用效率的重要指标,也是国家实行最严格水资源管理制度重要考核指标之一。选取广西223个样点灌区,采用“首尾测算分析法”测定样点灌区灌溉水有效利用系数,进而推算广西灌溉水有效利用系数。经过测算,2019年广西农田灌溉水有效利用系数为0.501,其中大型灌区为0.507、中型灌区为0.471、小型灌区为0.515。

The effective utilization coefficient of farmland irrigation water is an important index of evaluating the wa⁃ter use efficiency of irrigation zone,and is also one of the key performance check indicators of the most strict water resource management system implemented by China.223 sample irrigation zones were selected and the beginning and ending measurement analysis method was adopted.The irrigation water effective utilization coefficients of 223 sample irrigation zones were measured,based on which the effective utilization coefficient of Guangxi farmland irri⁃gation water was calculated.According to the results of calculation for 2019,the effective utilization coefficient of Guangxi farmland irrigation water is 0.501,of which the coefficient of large-scale irrigation zone is 0.507,the coeffi⁃cient of mid-scale irrigation zone 0.471,the coefficient of small-scale irrigation zone 0.515.