| Comparison and modification of ET0 models based on radiation and temperature in Turpan region |
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| DOI：10.7606/j.issn.1000-7601.2020.02.37 |
| Key Words: ET0 estimation model accuracy evaluation modification temperature radiation Turpan region |
| Author Name | Affiliation | | FAN Liufei | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | PI Yuanyue | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | YU Yang | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China | | YU Ruide | State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: |
| By using the daily climatic data of three meteorological stations from 2000 to 2015 in Turpan region, and taking FAO-56 Penman-Monteith (FAO-56 PM) model as the standard model, six ET0 models (M-A model, P-T model, M-H model, H-S model, Traj model, and B-H model) were evaluated and modified. The estimation accuracy were analyzed with root mean square error(RMSE), mean absolute error (MAE), mean relative error (MRE), and non\|parametric Wilcoxon test at yearly and monthly scales, respectively.The purpose was to find a simple and accurate ET0 model in Turpan region.The results indicated that the main meteorological factor affecting ET0 was Rs (solar ridiation) in Turpan region,followed by es (saturated water pressure) and Rn (crop surface net radiation). Before the modification, the M-H model had the highest estimation accuracy on the yearly scale.On the monthly scale, the errors of all models were large and there were significant differences with the calculation results of the FAO-56 PM model, and the applicability was poor in Turpan region. After the modification, the accuracy of each model on the yearly and monthly scales was significantly improved, and there was no significant difference with the FAO-56 PM model. The modified P-T, M-H, and B-H models had the highest estimation accuracy and can be used as simple and accurate ET0 models in Turpan region. |
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