-------------全国农田灌溉水有效利用系数测算分析技术指导细则全国农田灌溉水有效利用系数测算分析专题组2013年12月--------------------------目录前言........................................................................................................................11测算分析工作总体框架与流程.....................................................................32灌溉水有效利用系数测算分析方法.............................................................42.1灌区灌溉水有效利用系数测算分析方法....................................................................42.2区域灌溉水有效利用系数测算分析方法....................................................................43样点灌区选择..................................................................................................63.1样点灌区选择原则......................................................................................................63.2样点灌区数量要求......................................................................................................63.3样点灌区调整条件......................................................................................................74样点灌区灌溉水有效利用系数测算.............................................................94.1典型田块选择..............................................................................................................94.2典型田块亩均净灌溉用水量观测与分析方法........................................................124.3样点灌区年净灌溉用水总量测算............................................................................194.4样点灌区年毛灌溉用水总量计算与分析................................................................214.5样点灌区灌溉水有效利用系数计算........................................................................225省级区域灌溉水有效利用系数计算分析...................................................245.1省级区域大型灌区灌溉水有效利用系数计算........................................................24--------------------------5.2省级区域中型灌区灌溉水有效利用系数计算........................................................245.3省级区域小型灌区灌溉水有效利用系数计算........................................................255.4省级区