基于广西气象数据的蒸散发计算公式对比及修正  

Comparison and Modification of Evapotranspiration(ET) Calculation Equations Based on Data from Guangxi Province

作　　者：潘菲[1,2] 翟禄新[2] 杨庆媛[1] 

机构地区：[1]西南大学地理科学学院,重庆400715 [2]广西师范大学环境与资源学院,广西桂林541004

出　　处：《灌溉排水学报》2014年第1期55-60,共6页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(41261005);广西教育厅科研项目(2010MS028);广西师范大学重点项目(2010ZD009)

摘　　要：基于1951—2006年广西25个气象站气象资料,选取6个潜在蒸散发公式计算月ET0,并以FAO56-Penman-Monteith(PM)法计算结果为基准进行比较。结果表明,Doorenbos-Pruitt法与PM法线性计算结果相关性最好,Thornthwaite法、Hargreaves法、Makkink法、Turc法、Priestley-Taylor法计算结果的均方根误差相对较大。修正后Hargreaves法、Makkink法、Turc法、Priestley-Taylor法和Doorenbos-Pruitt法计算精度得到提高,特别在农作物生长时期(3—10月)内均方根误差较小,可用于计算广西地区ET0。Six equations （Thornthwaite, Hargreaves, Makkink , Turc , Priestley-Taylor and DoorenbosPruitt） were selected to calculate monthly potential evapotranspiration （ET0）. and were compared with FA056-Penman-Monteith（PM） equation using daily climatic data at 25 meteorological stations in Guangxi from 1951 to 2006. The results indicated that there was linearly related between ET0 calculated using six equations and PM equation, Doorenbos-Pruitt equation performed well and the values of RMSE were the least among six methods, while other five equations had the higher RMSE and could not be used to calculate ETo directly in Guangxi. After six equations were calibrated, all equations were obviously improved in calculating monthly ET0, and had the lower RMSE during the crop grow-up period （from March to October） especially except for Thornthwaite equation, which could be used to culculate ET0 in Guangxi provmce.

关 键 词：潜在蒸散发 公式修正 区域分异 广西 

分 类 号：S161.4[农业科学—农业气象学]