水利水电科技进展Issue(6)：47-51,89,6.DOI:10.3880/j.issn.1006-7647.2015.06.009
Priestley-Taylor和Hargreaves公式在高矮两种参考作物上的适应性与率定
Calibration of Priestley-Taylor and Hargreaves and its applicability for both alfalfa and grass reference crops
摘要
Abstract
With ASCE standardized reference Penman-Montieth as benchmark reference evapotranspiration equation, two commonly used ETref estimating methods, namely Priestley-Taylor and Hargreaves, were evaluated, local calibrated and validated in different climate regions in China. The results showed that Priestley-Taylor and Hargreaves performed better for grass reference crop in humid and arid regions,respectively. But the error in ETref estimating is unneglectable, and its can not be applied directly to alfalfa reference crop without local calibration. The local calibrated Priestley-Taylor and Hargreaves performed better in different climate regions, and the accuracy was significantly improved for alfalfa reference crop. Both methods performed better on grass than alfalfa reference crop. Performance of Priestley-Taylor showed no significant difference in different climate region, and Hargreaves had higher precision in arid region.关键词
参考作物蒸发蒸腾量/Penman-Montieth公式/Priestley-Taylor公式/Hargreaves公式/高型参考作物/矮型参考作物/地区/地区适应性/地区率定Key words
reference evapotranspiration/ASCE standardized reference Penman-Montieth/Priestley-Taylor/Hargreaves/alfalfa reference crop/grass reference crop/local applicability/local calibration分类
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吕玉平,徐俊增,李斌,孙璐,杨士红..Priestley-Taylor和Hargreaves公式在高矮两种参考作物上的适应性与率定[J].水利水电科技进展,2015,(6):47-51,89,6.基金项目
水利部公益性行业科研专项(201201025) （201201025）
江苏高校优秀科技创新团队(2014501912) （2014501912）
