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Position: Home > Articles > Applicability of simplified reference crop evapotranspiration equations in high altitude and cold area of Qinghai Province Journal of Northwest A & F University(Natural Science Edition) 2013,41 (11) 201-208

简化参照作物蒸散量(ET_o)计算公式在青海省高寒区的适用性分析

作  者:
胡兴波;芦新建;董梅;连利叶;贺康宁
单  位:
北京林业大学水土保持学院;北京林业大学水土保持学院水土保持与荒漠化防治教育部重点实验室;中国科学院西北高原生物研究所
关键词:
参考作物蒸散;Penman-Monteith公式;Hargreaves公式;Priestley-Taylor公式;Makkink公式;青海省
摘  要:
【目的】以Penman-Monteith FAO-56公式为参照,分析Hargreaves、Priestley-Taylor和Makkink 3种简化的参照作物蒸散量(ETo)公式在青海高寒区的适用性。【方法】以青海省5个气候区(湿润、半湿润、半干旱、干旱和极端干旱)11个气象站1984-2011年的旬气象资料计算ETo,建立分析3种简化公式旬ETo与PenmanMonteith FAO-56公式的线性回归方程,并对比其年值的均方根误差率,分析3种简化公式的适用性。【结果】Hargreaves公式在大多数站点都低估了ETo,但在湿润和半湿润区的计算结果较好;Priestley-Taylor公式在多数站点都高估了ETo;Makkink公式在所有站点都低估了ETo,但其旬ETo值的误差最小,其与PMF-56公式的线性回归结果也最好。除极端干旱区外,Priestley-Taylor和Makkink公式计算的ETo与PMF-56公式的年均方根误差率均小于15%。【结论】Hargreaves公式只适用于青海省的湿润和半湿润区,Priestley-Taylor和Makkink公式可以直接用于青海省极端干旱区以外地区ETo的计算。
译  名:
Applicability of simplified reference crop evapotranspiration equations in high altitude and cold area of Qinghai Province
作  者:
HU Xing-bo;LU Xin-jian;DONG Mei;LIAN Li-ye;HE Kang-ning;College of Soil and Water Conservation,Beijing Forestry University;Institute of Water Resources and Hydropower of Qinghai Province;
关键词:
reference crop evapotranspiration;;Penman-Monteith;;Hargreaves;;Priestley-Taylor;;Makkink;;Qinghai Province
摘  要:
【Objective】Taking Penman-Monteith FAO-56formula as reference,the applicability of 3simplified reference crop evapotranspiration(ETo)formulas(Hargreaves,Priestley-Taylor and Makkink)was compared in high altitude and cold area of Qinghai Province.【Method】ETo values were computed using 10-day averaged data at 11 meteorological stations in 5climate zones(humid,semi-humid,semidrought,arid and extremely arid)from 1984to 2011in Qinghai Province.Applicability of 3simplified formulas was analyzed by analyzing the linear regression equations using 10-day ETo values and RMSErates of annual ETo and taking Penman-Monteith FAO-56values as benchmark.【Result】Hargreaves formula tended to underestimate 10-day ETo values at most stations except in humid and semi-humid climate zones.Priestley-Taylor method tended to overestimated ETo.Makkink model underestimated ETo at all stations but its error of 10-day values was the least and its linear regression with Penman-Monteith FAO-56equation was the best.Moreover,differences between annual ETo RMSDrates from Priestley-Taylor and Makkink and FAO-56were less than 15%at all climate zones except extremely arid climate zone.【Conclusion】Hargreaves method can be used in humid and semi-humid climates only,but Priestley-Taylor and Makkink model can be applied to all climate zones except extremely arid climate region in Qinghai Province.

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