贺州市2018-2023年农田灌溉水有效利用系数年间变化分析OA

As the ratio of the net irrigation water used by crops to the total irrigation water diversion at the head of wa-ter source canal,the effective utilization coefficient of farmland irrigation water can reflect the situation of canal wa-ter diversion,farmland water use and irrigation project,the water management level and irrigation technology level.The effective utilization coefficients of irrigation water were calculated by head and tail measuring method for the 18 sample irrigation zones selected in Hezhou City,based on which the effective utilization coefficient of farmland irri-gation water of the whole city was calculated.Through the comparative analysis of the annual variation of the effec-tive utilization coefficient of irrigation water from 2018 to 2023,it is found that the effective utilization coefficient of farmland irrigation water is increasing year by year in Hezhou City,and is expected to keep a gentle growth trend in the coming period.