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Position: Home > Articles > Comparison and Revision of Temperature-based ET_0 Calculation Methods for Huanghuaihuai Areas Water Saving Irrigation 2014 (4) 1-6+10

黄淮海地区基于温度的ET_0计算方法比较及修正

作  者：
刘战东;刘祖贵;秦安振;陶国通;南纪琴;张寄阳
单  位：
中国农业科学院农田灌溉研究所农业部作物需水与调控重点开放实验室
关键词：
参考作物需水量;温度;预测;修正;黄淮海地区
摘  要：
参考作物需水量ET0预测是计算作物需水量和进行灌溉管理的主要依据。根据黄淮海地区7个气象站(北京、石家庄、安阳、郑州、孟津、驻马店和信阳)的42a长系列资料(包括最高最低气温、相对湿度、日照时数和风速),利用FAO56-PM公式对3种基于温度的ET0计算方法(Hargreaves、McCloud、Thornthwaite)进行比较分析,主要依据平均偏差、平均相对偏差、相关系数和t统计量4种指标分别对旬、月和年值序列的吻合程度做出评价。结果表明:Hargreaves与FAO56-PM吻合最好,其次为McCloud,吻合最差的为Thornthwaite,从而说明Hargreaves公式在类似地区运用的可行性;基于对Hargreaves公式进行修正,可使Hargreaves公式更适合黄淮海地区ET0的计算和预测。
译  名：
Comparison and Revision of Temperature-based ET_0 Calculation Methods for Huanghuaihuai Areas
作  者：
LIU Zhan-dong;LIU Zu-gui;QIN An-zhen;TAO Guo-tong;NAN Ji-qin;ZHANG Ji-yang;Key Laboratory for Crop Water Requirement and Its Regulation,Ministry of Agriculture,Farmland Irrigation Research Institute,Chinese Academy of Agricultural Sciences;
关键词：
crop reference evapotranspiration;;temperature;;prediction;;revision;;Huanghuaihai areas
摘  要：
Crop reference evapotranspiration(ET0)provides important basis for determining crop water requirement and optimizing irrigation management.In this work,based on the 42-year(1961-2002)long term meteorological database(including max-and min ?air temperature,relative humidity,sunshine duration,and wind speed)obtained from seven meteorological stations located in Beijing,Shijiazhuang,Anyang,Zhengzhou,Mengjin,Zhumadian,and Xinyang cities in the Huanghuaihai areas,the FAO56-PM equation was used to evaluate the fitness degree among the estimated ET0values of 10d,1month and 1year by three temperature-based ET0calculation methods,i.e.Hargreaves,McCloud and Thornthwaite,according to the 4indexes,including mean deviation,mean relative deviation,correlation coefficient,and t statistic.The results showed that the estimated values by Hargreaves method were best fitted to that by FAO56-PM,followed by McCloud,and Thornthwaite.This indicates that Hargreaves method was the most feasible and practical ET0calculation method for the regions similar to Huanghuaihai areas.A revised Hargreaves equation was suggested in this study to ensure it more suitable for ET0prediction in Huanghuaihai areas.

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