首尾测算法在农业灌溉用水有效利用系数测算中的应用

目的]对农十师北屯灌区农业田间灌溉水利用系数资料进行搜集、整理以及实地调研,了解目前灌区灌溉水利用系数测量中存在问题及原因,进行数据论证.方法]采用首尾测算分析方法.结果]经计算作物净灌水量为18 558.48 m3,作物灌溉用水有效系数为0.522,相对误差值为4.79;,在误差的允许范围内,计算值与实测值保持一致.结论]农十师北屯灌区农业田间节水技术数据计算与首尾测算分析方法具有一致性,并与北屯灌区的灌溉规模、工程状况、管理水平和灌溉水利用率的基本情况相符,进一步验证了首尾测算分析方法的正确性、可靠性,作为今后灌区测定灌溉水利用系数的综合测定计算方法.

Application of Head-tail Calculation Method in Calculation of Agricultural Irrigation Water Effective Utilization Coefficient

【Objective】Through the collection,treatment and spot investigation of the water efficiency of irrigation data of agricultural fields in Beitun irrigation region of the 10th Agricultural Production Division,the datum proof of research results has been started on the basis of the problems and causes existing in the irrigation water utilization coefficient in irrigation district at present.【Method】the head - tail calculation method has been used to calculate irrigation water efficient utilization coefficient.【Result】Through the calculation,the net irrigation amount is 18,558.48 m,the crop irrigation water effective coefficient is 0.552, the relative error is 4.79%.And the calculated and measured value keeps consistent in the allowable range.【Conclusion】The data calculation of research results with water - saving technology in agriculture field in Beitun irrigation region of the 10th Agricultural Production Division has consistency with the head - tail analysis method,and it is consistent with the basic situation of irrigation scale,engineering condition, management level and irrigation water use efficiency in Beitun irrigation region.The results further verified the correctness and reliability of head - tail calculation method,and this method can be the calculation method to synthetically determine the irrigation water utilization coefficient in the future.