Comparison of Methods for Estimating Reference Crop Evapotranspiration in Beijing

• 作者: Cao Yajie Li Xin Mo Nannan Shi Youyu
• 来源期刊: 气象与环境研究:英文版
• 学科: 农学
• 关键词: REFERENCE CROP EVAPOTRANSPIRATION ESTIMATION method Comparison
• 年，卷（期）: 2019,（6）
• 页码范围: 72-74
• 页数: 3页
• 分类号: S31

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.