干旱地区农业研究Issue(3)：95-101,7.
河套灌区参考作物蒸发蒸腾量估算方法研究
Research on the estimating methods for reference crop evapotranspiration in Hetao Irrigation District
摘要
Abstract
Reference crop evapotranspiration ( ET0 ) is the base for calculating crop water requirements ,and it gen-erally uses the Penman-Monteith Formula (PM formula ) recommended by FAO to calculate .But this method cannot be used in some regions in Hetao irrigation district ,due to lack of the measured radiation data .Herein in this paper ,we se-lected and used the daily climatic data at Linhe Meteorological Station from 1990 to 2012 ,analyzed the relation between the reference crop evapotranspiration ( ET0 ) estimated by the PM formula to the climatic factors ,has found the net radia-tion that was the dominated factor greatly influencing ET0 ,the second factors were the saturated vapor pressure deficit and mean temperature .Also has established the ET0 estimating formula based on the saturated vapor pressure deficit , temperature and wind speed .By the confirmation ,the correlation coefficient ,Nash Efficiency Coefficient and overall e-quilibrium coefficient were 0 .96 ,0 .92 and 1 .00 ,respectively .Under the condition of lack the measured wind speed , another estimated ET0 formula by considering the saturated vapor press deficit and temperature was established .These two formulas can be provided the simple and accurate methods for estimating ET0 in Hetao irrigation district when the measured meteorological data was limited .关键词
参考作物蒸发蒸腾量/估算方法/净辐射/纳什效率系数/河套灌区Key words
reference crop evapotranspiration/estimation method/net radiation/Nash Efficiency Coefficient/Hetao Irrigation District分类
农业科技引用本文复制引用
王旭明,刘海军,张睿昊,李艳..河套灌区参考作物蒸发蒸腾量估算方法研究[J].干旱地区农业研究,2014,(3):95-101,7.基金项目
国家自然科学基金项目（51179005）；水利部公益性项目 （）
