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对2007—2012年全国纯井灌区不同类型有效灌溉面积占纯井灌区有效灌溉面积的比例与纯井灌区灌溉水有效利用系数进行多元回归分析,建立了灌溉水有效利用系数模型。结果表明,5种灌溉类型灌溉面积占比对纯井灌区灌溉水有效利用系数的影响程度为:微灌>喷灌>管道输水地面灌>防渗渠道地面灌>土质渠道地面灌;各省、全国纯井灌区灌溉水有效利用系数模拟值与实测值误差分别在±10%、2%以内。
Based on the multiple regression analysis of the ratio of different types of effective irrigated area to the effective irrigation area of pure well irrigated area and the effective utilization coefficient of irrigated water in pure well irrigated area from 2007 to 2012, the effective utilization coefficient model of irrigated water was established. The results showed that the influence of the proportion of irrigation area of five irrigation types on the effective utilization coefficient of irrigation water in pure well irrigation area was: micro irrigation> sprinkler irrigation> surface irrigation of pipeline irrigation> surface irrigation of seepage prevention canal> ground irrigation of soil channel; The error of the effective utilization coefficient of irrigation water in pure well irrigation area is within ± 10% and 2% respectively.