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当前位置: 首页 > 文章 > 分别利用Hargreaves和PM公式计算西北干旱区ET_0的比较 农业工程学报 2006,22 (10) 29-33
Position: Home > Articles > Comparison of estimating ET_0 in arid-area of Northwest China by Hargreaves equation and Penman-Monteith equation Transactions of the Chinese Society of Agricultural Engineering 2006,22 (10) 29-33

分别利用Hargreaves和PM公式计算西北干旱区ET_0的比较

作  者：
王新华;郭美华;徐中民
单  位：
兰州理工大学材料科学与工程学院;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室
关键词：
Hargreaves公式;Penman-Monteith公式;参照作物需水量
摘  要：
该文根据甘肃张掖气象站1991~2000年的气象资料,利用H argreaves公式和Penm an-M on te ith公式计算了参照作物需水量(ET0)。对比分析结果表明:H argreaves公式计算的ET0H年值比Penm an-M on te ith公式的计算ET0PM偏低,而在年内6、7、8月份,ET0H>ET0PM,9月份两种方法计算结果几乎相等,其他月份ET0H
译  名：
Comparison of estimating ET_0 in arid-area of Northwest China by Hargreaves equation and Penman-Monteith equation
作  者：
Wang Xinhua~1,Guo Meihua~2,Xu Zhongmin~1(1.State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences,Lanzhou 730000,China;2.College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
关键词：
Hargreaves equation;Penman-Monteith equation;reference crop evapotranspiration
摘  要：
According to the climate data from 1991 to 2000 at Zhangye weather station,using Hargreaves equation and Penman-Monteith equations,the reference crop evapotranspiration(ET_0) was calculated.Results show that the annual value of ET_0 calculated by Hargreaves equation is lower than that calculated by Penman-Monteith equation.ET_0H will be greater than ET_0PM in June,July and August.The calculating value will almost be equal in September,and ET_0H will be lower than ET_0PM in other months.The difference is caused by precipitation and wind speed.Based on the estimating ET_0 by the two equations,the ET_0 calculating equation applied in arid-area of Northwest China is put forward.

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