Comparison of Methods for Estimating Reference Crop Evapotranspiration in Beijing  

作　　者：Cao Yajie Shi Youyu Mo Nannan Li Xin 

机构地区：[1]Zunhua Meteorological Bureau.Zunhua064200,China [2]Tangshan Meteorological Bureau,Tangshan 063000,China [3]Caofeidian Meteorological Bureau,Tangshan 063200,China

出　　处：《Meteorological and Environmental Research》2019年第6期72-74,78,共4页气象与环境研究（英文版）

基　　金：Supported by National Natural Science Foundation of China(41371065)

摘　　要：Based on the meteorological data from 1951 to 2015 in Beijing,the reference crop evapotranspiration(ET_0)in Beijing was estimated using the FAO 56 Penman-Monteith method,the FAO PPP-17 Penman method,the Hargreaves method,and the Priestley-Taylor method.The results showed that the monthly and annual changing trends of ET0 estimated by the four methods are basically the same.In general,the ET0 values estimated by the Hargreaves method are the closest to those of the standard method FAO 56 Penman-Monteith,while the difference between the FAO PPP-17 Penman method and the standard method is the biggest.The Hargreaves method is the most suitable method for the estimation of ET0 in Beijing.Based on the meteorological data from 1951 to 2015 in Beijing,the reference crop evapotranspiration（ ET0） in Beijing was estimated using the FAO 56 Penman-Monteith method,the FAO PPP-17 Penman method,the Hargreaves method,and the Priestley-Taylor method. The results showed that the monthly and annual changing trends of ET0 estimated by the four methods are basically the same. In general,the ET0 values estimated by the Hargreaves method are the closest to those of the standard method FAO 56 Penman-Monteith,while the difference between the FAO PPP-17 Penman method and the standard method is the biggest. The Hargreaves method is the most suitable method for the estimation of ET0 in Beijing.

关 键 词：REFERENCE CROP EVAPOTRANSPIRATION ESTIMATION method Comparison 

分 类 号：S31[农业科学—作物栽培与耕作技术]