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Comparison of Some Mathematical Models to Calculate Evapotranspiration in Contrasting Regions of Iraq |
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| รหัสดีโอไอ | |
| Creator | 1. Dher I. Bakr 2. Jasim Al-Khalidi 3. Azhar S. Hadi |
| Title | Comparison of Some Mathematical Models to Calculate Evapotranspiration in Contrasting Regions of Iraq |
| Publisher | Thai Society of Higher Education Institutes on Environment |
| Publication Year | 2564 |
| Journal Title | EnvironmentAsia |
| Journal Vol. | 14 |
| Journal No. | 2 |
| Page no. | 40-50 |
| Keyword | Evapotranspiration, Penman-Monteith, Thornthwaite, Khrrufa, Ivanov, Correlation, Mean Absolute Error |
| URL Website | http://www.tshe.org/ea/index.html |
| Website title | EnvironmentAsia |
| ISSN | 1906-1714 |
| Abstract | Evaporation is one of the major components of hydrologic cycle and water balance. Thedata required for its accurate estimation are commonly available only at widely spaced weather stations. Evapotranspiration can be estimated using mathematical models based on atmospheric variable, which can be measured directly. However, these mathematical models differ among themselves in terms of accuracy of the results due to the different determinants of each mathematical model. In addition, the accuracy of the model variesfrom region to region. The current study aims to compare some mathematical modelsperformance in selected regions in Iraq. The results showed that Penman-Monteith modelwas the best model for calculating Evapotranspiration in Iraq as it achieved values close tothe observed values of evapoetranspiration with a high correlation and an absolute errorcoefficient ratio is small. In comparison, Ivanov model was the least accurate model witha smaller correlation values and higher absolute error rate values than the other methods. The data used in this study are a time series of the evapotranspiration values of agricultural stations. These data are measured by means of lysrometers.The model that uses the largest number of atmospheric variables that influence on Evapotranspiration calculation is the best. |
