龙胜县农田灌溉水有效利用系数测算分析

Calculation and Analysis of Effective Utilization Coefficient of Farmland Irrigation Water in Longsheng County

以龙胜各族自治县为例,共选取16个典型田块,通过观测典型田块和样点灌区渠首的用水量,在各灌区采用首尾测算法开展了全面测算分析。结果表明:龙胜县小型渠灌灌区农田灌溉水有效利用系数为0.534,高效节水灌区农田灌溉水有效利用系数为0.881,在此基础上经过进一步计算,得出龙胜县农田灌溉水有效利用系数为0.540。研究成果表明:龙胜县农业灌区存在较大节水潜能,能够为龙胜县坡地梯田灌区的节水灌溉带来切实可行的发展筹划,同时为解决水资源浪费与短缺的问题带来科学合理的配置。

As an example,in Longsheng Autonomous County,a total of 16 typical fields were selected.The head-to-end measurement algorithm was used to carry out comprehensive calculation and analysis in each irrigation area by observing the water consumption of the typical fields and irrigation heads of the irrigation areas.After calculation,the effective utilization coefficient of farmland irrigation water in small canal irrigation areas of Longsheng county is 0.534,and that of farmland irrigation water in high-efficiency water-saving irrigation area is 0.534.The effective utilization coefficient is 0.881.According to further calculation,the effective utilization coefficient of agricultural irrigation water in Longsheng County is 0.540.The research results show that the agricultural irrigation areas of Longsheng County has a large water saving potential,which can save water for the slope terrace irrigation areas of Longsheng County.Irrigation provides a practical plan for development and a scientific basis for solving the problem of water waste and shortage.