武夷山楮树下灌区灌溉水有效利用系数测算分析

Calculation and Analysis of Water Efficiency Coefficient of Irrigation in Chushuxia Irrigation Area of Wuyishan City

在开展武夷山楮树下灌区调查,收集整理灌区灌溉供需用水、设施条件、气象等基础信息资料的基础上,按首尾测算法推算出武夷山楮树下灌区灌溉水有效利用系数。测算分析结果表明:楮树下灌区2017年灌溉水有效利用系数为0.547;对比分析2008-2017年灌溉水有效利用系数,系数逐年递增;对比分析2008-2017年灌溉水有效利用系数与投资的关系,工程投资对系数的增幅在0.19%~3.64%之间,工程投资对灌溉水有效利用系数的影响为正相关,即投资越大系数增幅越大;对比分析2008-2017年综合灌溉定额与降水量的关系,认为降雨量对综合灌溉定额的影响为负相关,即降雨量越大,综合灌溉定额相对越小。灌溉水有效利用系数、投资、综合灌水定额的变化趋势均符合一般规律。

Based on the investigation of Chushuxia Irrigation Area in Wuyishan City,the basic information such as water supply and demand,irrigation facilities,and weather conditions have been gained and according to the first and last measurement the effective utilization coefficient of irrigation water of Chushuxia Irrigation Area is deduced. Calculation and analysis results show that the effective utilization coefficient of irrigation water of Chushuxia Irrigation Area is 0.547. Compared with the effective utilization coefficients of irrigation water in2008-2017,the coefficients increase year by year and the trend is consistent with the general rules. Compared the effective utilization coefficients of irrigation water with investments in 2008-2017,the growth in the coefficient of engineering investment is between 0. 19% -3.64% and the engineering investments are positively related to the effective utilization coefficients of irrigation water. That is,the greaterthe engineering investment,the greater coefficient. Compared with the effective utilization coefficients of irrigation water with rainfalls in 2008-2017,the influence of rainfall on the comprehensive irrigation quota is negatively correlated. That is,the larger the rainfall,the smaller the comprehensive irrigation quota.