Optimizing radiation and temperature models to estimate reference plant evapotranspiration
Document Type : ORIGINAL_ARTICLE
Authors
- Department of Water Science and Engineering, Ta.C., Islamic Azad University, Tabriz, Iran
Abstract
To estimate potential evapotranspiration, many relationships based on the climatic conditions of different regions have been proposed by researchers, which need to be evaluated and calibrated before applying them to specific locations. Each of these relationships has different functions depending on the climatic conditions. This study aimed to optimize temperature and radiation models for estimating ET0 at the Jolfa synoptic station. The Penman-Monteith model served as a benchmark for evaluating these models. Calibration was performed using linear and power equations. The t-test results indicated that there was no significant difference between the ET0 values obtained from the Hargreaves, Linacre, and Jensen-Haise methods compared to the standard FAO56-Penman-Monteith method. Among the methods used, the Thornthwaite method had the highest coefficient of determination, with values above 0.891 across all months. The Hargreaves and Linacre methods showed the strongest correlation with the Penman-Monteith method after Thornthwaite, with determination coefficients of 0.883 and 0.874, respectively. Consequently, using the Thornthwaite, Hargreaves, and Linacre methods, after applying calibration coefficients, is recommended for estimating ET0 in the study area.
Keywords
Subjects
Allen, R. G., Pereira, L. S., Raes, D. & Smith, M. (1998). Crop evapotranspiration-Guidelines for computing crop water requirements-FAO. Journal of Hydrology, 285,19-40.
Amatya, D. M., Irmak, S., Gowda, P., Nettles, J. E., & Douglas-Mankin, K. R. (2016). Ecosystem evapotranspiration: challenges in measurements, estimates, and modeling. Agriculture and Biological Engineering, 59(2), 555-560. DOI: https://doi.org/10.13031/trans.59.11808
Antonopoulos, V. Z., & Antonopoulos, A. V. (2018). Evaluation of different methods to estimate monthly reference evapotranspiration in a Mediterranean area. Journal of Water Utility, 18, 61-77.
Anyadike, R. N. (1987). The Linacre evaporation formula tested and compared to others in various climates over West Africa. Agricalctural and Forest Meteorology, 39(2), 111-119. DOI: https://doi.org/10.1016/0168-1923(87)90030-X.
Atard, P., Moin Sadeghi, S. M, Fathizadeh, O., Motahari, M., Rahbari Sisakht, S., Ahmadi, M. T., & Bayramzadeh, V. (2015). Comparison of temperature and radiation methods for estimating reference evapotranspiration with Monteith-Penman FAO standard method in Gorgan. Journal of Forest and Wood Products, 68(2), 359-369. DOI: 10.22059/JFWP.2015.54837. [In Persian].
Babamiri, O., & Dinpazhoh, Y. (2014). Comparison of four temperature based reference crop evapotranspiration estimation method at Urmia Lake Basin. Irrigation Sciences and Engineering (Scientific Agricultural Journal), 37(1), 43-54. DOI: 20.1001.1.25885952.1393.37.1.5.3 [In Persian].
Blaney, H. F., & Criddle, W.D. (1950). Determining water requirements in irrigated areas from climatological and irrigation data. USDA, SCS-TP96, 96. 48.
Bodian, A., Malick Ndiaye, P., Bassirou Diop, S., Diop, L., Dezetter, A., Ogilvie, A., & Djama, K. (2024). Evaluation and calibration of alternative methods for estimating reference evapotranspiration in the main hydrosystems of Senegal: Senegal, Gambia and Casamance River Basins. Proceedings of IAHS, 385, 415–421. DOI: https://doi.org/10.5194/piahs-385-415-2024.
Doorenbos, J., & Pruitt, W. O. (1977) Crop Water Requirements. FAO Irrigation and Drainage Paper 24, FAO, Rome. 144.
Gentilucci, M., Bufalini, M., Materazzi, M., Barbieri, M., Aringoli, D., Farabollini, P., & Pambianchi, G. (2021). Calculation of Potential Evapotranspiration and Calibration of the Hargreaves Equation Using Geostatistical Methods over the Last 10 Years in Central Italy. Geosciences, 11(8), 348-358. DOI: https://doi.org/10.3390/geosciences11080348
Ghamarnia, H., & Soltani, N. (2019). Evaluating efficiency of empirical estimation reference evapotranspiration (Pan based method) in different climate conditionss (Case Study of Iran). Tahqiqat- Manabi Ab Iran, 14(4), 174-193 [In Persian].
Grismer, M. E., Orang, M., Snyder, R. L., & Matyac, R. (2002). Pan evaporation to reference evapotranspiration conversion methods. Journal of Irrigation and Drainage Engineering, 128(3), 263-267. DOI: 10.1061/(ASCE)0733-9437(2002)128:3(180)
Hafeez, M., Gulshan, A. B., & Tahira, F. (2020). Penman and Thornthwaite equations for estimating reference evapotranspiration under semi-arid environment. Journal of Plant Sciences, 8(5), 146-151. DOI: 10.11648/J.JPS.20200805.16
Jensen, M. E., & Haise, H. R. (1963). Estimating evapotranspiration from solar radiation. Journal of Irrigation and Drainage Division, 89, 15-41. DOI: 10.1061/JRCEA4.0000287
Linacre, E. T. (1977). A simple formula for estimating evaporation rates in various climates, using temperature data alone. Agricultural Meteorology, 18(6), 409–424. DOI: 10.1016/0002-1571(77)90007-3
Makkink, G.F. (1957). Testing the Penman formula by means of lysimeters. Journal of the Institution of Water Engineers, 11(3), 277-288.
Olivier, H. (1961). Irrigation and climate, Edward Arnold, Ltd., London, 250 pp.
Pandey, P., Dabral, P., & Pandey, V. (2016). Evaluation of reference evapotranspiration
methods for the northeastern region of India. International Soil and Water Conservation Research, 4(1), 52–63. DOI: 10.1016/j.iswcr.2016.02.003
Rudolf, F., William, W., & Donna, L. M. (2010). Statistical Methods. Third Edition Academic Press, 790, DOI: https://doi.org/10.1016/C2009-0-20216-9
Salarian, M., Najafi, M., Davari, K., Islamian, S., & Heydari, M. (2014). The most appropriate method to estimate potential evapotranspiration in meteorological data scarce condition in the warm and cold months of the year (Case study of Isfahan). Iranian Journal of Irrigation and Drainage, 8(45), 62-73 [In Persian].
Stephens, J. C. (1965). Discussion of estimating evaporation from insolation. Journal of Hydraulic Division, 91(5), 171-182. DOI: 10.1061/JYCEAJ.00013
Thornthwaite, C. W. (1948). An approach toward a rational classification of climate.Geographical Review, 38, 55-97. DOI: http://dx.doi.org/10.2307/210739
Turc, L. (1961). Water requirements assessment of irrigation, potential evapotranspiration: Simplified and updated climatic formula. Annales Agronomiques, 12, 13-49.
Xu, C., & Singh, V. (2002). Cross comparison of empirical equations for calculating potential
evapotranspiration with data from Switzerland. Water Resources Management, 16, 197-219. DOI: 10.1023/A:1020282515975
)