京津冀地区参考作物蒸散量算法比较及参数标定  

Comparison and Calibration of Algorithms for Reference Crop Evapotranspiration in the Beijing-Tianjin-Hebei Region

作　　者：薛庆禹 武荣盛[2] 党超琪 刘淑梅[4] 黎贞发[4] XUE Qingyu;WU Rongsheng;DANG Chaoqi;LIU Shumei;LI Zhenfa(Cluster Rain Technologies(Tianjin)limited company,Tianjin 300384,China;Ecological and Agricultural Meteorological Center of Inner Mongolia Autonomous Region,Hohhot,Inner Mongolia 010051,China;Shanxi Meteorological Service Center,Xi'an,Shaanxi 710012,China;Tianjin Climate Center,Tianjin 300074,China)

机构地区：[1]联雨科技(天津)有限公司,天津300384 [2]内蒙古自治区生态与农业气象中心,内蒙古呼和浩特010051 [3]陕西省气象服务中心,陕西西安710012 [4]天津市气候中心,天津300074

出　　处：《天津农业科学》2025年第1期68-76,共9页Tianjin Agricultural Sciences

基　　金：公益性行业(气象)科研专项(重大专项)(GYHY201506001);天津市气象局科研项目(201603ybxm03);中国气象局创新发展专项(CXFZ2024Q004);内蒙古科技计划项目(2023YFSH0012,2020GG0117)。

摘　　要：为解决京津冀地区参考作物蒸散量估算中风速或日照时数等气象要素不足的问题,分别以Penman-Monteith、Priestley-Taylor、Hargreaves 3种方法计算了参考作物蒸散量,并以Penman-Monteith方法为标准,分站点逐月进行了参数标定,获得了适用于京津冀地区Priestley-Taylor与Hargreaves方法的参数标定值。结果表明:用Priestley-Taylor、Hargreaves默认参数估算参考作物蒸散量时,冷干月份(1—3月、11—12月)参考作物蒸散量偏低,暖湿月份(7—8月)参考作物蒸散量偏高;利用标定后的Priestley-Taylor方法计算时,温度较低月份的参考作物蒸散量相对均方根误差(NRMSE)平均降低10%~21%,暖湿月份的参考作物蒸散量相对均方根误差(NRMSE)平均降低7%~9%;利用标定后的Hargreaves方法计算时,冷干月份的参考作物蒸散量相对均方根误差(NRMSE)平均降低2%~10%,暖湿月份的参考作物蒸散量相对均方根误差(NRMSE)平均降低4%~5%。综上,基于各站点64年气象实测数据逐月标定的参数可知,使用Priestley-Taylor、Hargreaves方法可以较准确地估算京津冀地区参考作物蒸散量。To address the issue of insufficient meteorological data,such as wind speed or sunshine hours,in estimating reference crop evapotranspiration(ET0)in the Beijing-Tianjin-Hebei region,ET0 was calculated by three methods:Penman-Monteith,Priestley-Taylor,and Hargreaves.Using the Penman-Monteith method as the benchmark,monthly calibration was conducted for each station,yielding parameter calibration values specific to the Beijing-Tianjin-Hebei region for the Priestley-Taylor and Hargreaves methods.The results indicated that when using the default parameters of Priestley-Taylor and Hargreaves to estimate ET0,it was underestimated during cold and dry months(January to March,November to December),while it was overestimated during warm and humid months(July and August).When the calibrated Priestley-Taylor method was used for calculation,the average relative root mean square error(NRMSE)of ET0 in months with lower temperatures was reduced by 10%to 21%,and the average relative root mean square error(NRMSE)in warm and humid months was reduced by 7%to 9%.When the calibrated Hargreaves method was used for calculation,the average relative root mean square error(NRMSE)of ET0 in cold and dry months was reduced by 2%to 10%,and the average relative root mean square error(NRMSE)in warm and humid months was reduced by 4%to 5%.In conclusion,based on the monthly calibrated parameters of 64 years of meteorological measured data at each station,it can be known that the Priestley-Taylor and Hargreaves methods can estimate the reference crop evapotranspiration in the Beijing-Tianjin-Hebei region more accurately.

关 键 词：参考作物蒸散量 PENMAN-MONTEITH Priestley-Taylor HARGREAVES 

分 类 号：F323.8[经济管理—产业经济] F49