作 者：
杨永刚;崔宁博;胡笑涛;龚道枝;李晨;贾悦
关键词：
参考作物蒸散量;温度法;适应性评价;都江堰灌区;河套灌区;淠史杭灌区
摘 要：
为提高中国三大灌区(都江堰灌区、河套灌区和淠史杭灌区)参考作物蒸散量(reference crop evapotranspiration,ET_0)温度法的计算精度,选取8个代表性站点1961-2014年逐日气象资料,采用Irmark-Allen(IA)、Hargreaves and Samani(HS)、Turc(Tur)、Mc Cloud(MC)、Schendel(Sch)、Trajkovic(Tra)、Droogres and Allen-1(DA-1)和Droogres and Allen-2(DA-2)共8种温度法计算ET_0,以FAO-56Penman-Monteith(PM)法计算结果为标准,基于各方法计算的ET0日值线性回归方程(y=kx+b),分别在都江堰灌区选取IA法和Tra法,河套灌区选取HS法、DA-1法和DA-2法,淠史杭灌区选取IA法、HS法、DA-1法和DA-2法,引入调差参数对模型进行修订,利用均方根误差(RMSE)、平均相对误差(MRE)和Nash-Sutcliffe系数(NS)对其适应性进行评价。结果表明:都江堰灌区和淠史杭灌区所选模型修订后计算精度均有明显提高,河套灌区提高不明显;都江堰灌区IA修订模型(IA-Du法)在该灌区计算精度最高,其日值、旬值的RMSE、MRE和NS分别为0.318mm·d~(-1)、0.120和0.923,0.201mm·d~(-1)、0.093和0.959,且在不同月份均有较高计算精度;河套灌区计算精度最高模型为HS法,其日值、旬值的RMSE、MRE和NS分别为0.898mm·d~(-1)、0.326和0.785,0.547mm·d~(-1)、0.223和0.904,且在1-5月和10-12月具有较高计算精度;淠史杭灌区IA修订模型(IA-Pi法)在该灌区计算精度最高,其日值、旬值的RMSE、MRE和NS分别为0.534mm·d~(-1)、0.195和0.861,0.390mm·d~(-1)、0.167和0.896,且在不同月份均具有较高计算精度。因此,推荐IA-Du法、HS法和IA-Pi法分别作为都江堰灌区、河套灌区和淠史杭灌区计算参考作物蒸散量的方法。
译 名：
Revision and Adaptability Evaluation of Temperature-based Methods for Reference Crop Evapotranspiration in the Three Irrigation Districts of China
作 者：
YANG Yong-gang;CUI Ning-bo;HU Xiao-tao;GONG Dao-zhi;LI Chen;JIA Yue;State Key Laboratory of Hydraulics and Mountain River Engineering & College of Water Resource and Hydropower,Sichuan University;Provincial Key Laboratory of Water-Saving Agriculture in Hill Areas of Southern China;Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas,Ministry of Education, Northwest A&F University/Institute of Water-saving Agriculture in Arid Areas of China;State Engineering Laboratory for Efficient Water Use and Disaster Loss Reduction of Crops, Institute of Environment and Sustainable Development in Agriculture,CAAS;
关键词：
Reference crop evapotranspiration;;Temperature-based methods;;Adaptability evaluation;;Dujiangyan irrigation district;;Hetao irrigation district;;Pishihang irrigation district
摘 要：
Dujiangyan irrigation district, Hetao irrigation district and Pishihang irrigation district are the largest irrigation districts in China. In order to improve the calculation precision of reference crop evapotranspiration(ET0) based on temperature-based methods in the three irrigation districts of China, this paper used FAO-56 Penman-Monteith(PM) method and 8 temperature-based methods of Irmark-Allen(IA), Hargreaves-Samani(HS), Turc(Tur), Mc Cloud(MC), Schendel(Sch), Trajkovic(Tra), Droogres-Allen-1(DA-1) and Droogres-Allen-2(DA-2) to calculate ET0 based on the daily meteorological data of 8 representative stations from 1961 to 2014, and used the results of the PM method as the standard. Based on the equation of linear regression(y=kx+b) of daily ET0 calculated by 8 temperature-based methods and PM method, this paper selected IA method and Tra method in Dujiangyan irrigation district, selected HS method, DA-1 method and DA-2 method in Hetao irrigation district, selected IA method, HS method, DA-1 method and DA-2 method in Pishihang irrigation district. And those methods selected in each irrigation district were revised by introducing adjustment parameter. And then root mean square error(RMSE), mean relative error(MRE) and Nash-Sutcliffe coefficient(NS) were used to evaluate the adaptability. The results showed that the calculation precision of the revised methods selected in Dujiangyan irrigation district and Pishihang irrigation district were improved significantly. While the calculation precision of the revised methods selected in Hetao irrigation district were not improved significantly. The reviseded IA method(IA-Du method) in Dujiangyan irrigation district had the highest calculation precision. The daily values of RMSE, MRE and NS of IA-Du method were 0.318 mm·d~(-1), 0.120 and 0.923, and the average values of ten days were 0.201 mm·d~(-1), 0.093 and 0.959. Meanwhile the calculation precisions of IA-Du method in all months were high. HS method in Hetao irrigation district had the highest calculation precision. The daily values of RMSE, MRE and NS of HS method were 0.898 mm·d~(-1), 0.326 and 0.785, and the average values of ten days were 0.547 mm·d~(-1), 0.223 and 0.904. And HS method has high calculation precision in Jan. to May and Oct. to Dec. The revised IA method(IA-Pi method) in Pishihang irrigation district had the highest calculation precision. The daily values of RMSE, MRE and NS of IA-Pi method were 0.534 mm·d~(-1), 0.195 and 0.861, and the average values of ten days were 0.390 mm·d~(-1), 0.167 and 0.896. Meanwhile the calculation precisions of IA-Pi method in all months were high. Therefore, IA-Du method, HS method and IA-Pi method were recommended as the temperature-based method for calculating ET0 in Dujiangyan irrigation district, Hetao irrigation districtand and in Pishihang irrigation district respectively.
