Determination of seasonal variation in reference evapotranspiration using regression analysis

Year 2019, , 59 - 62, 01.06.2019

Kadri Yürekli Mehmet Murat Cömert , Müberra Erdoğan Saniye Demir

https://doi.org/10.29278/azd.593624

Abstract

In the study, variability in reference
evapotranspiration (ET₀) from Southeastern Anatolian Project (GAP)
area was investigated with linear regression method. For the purpose, seasonal ET₀
time series were formed from monthly reference evapotranspiration (ET₀).
The ET₀ data sets of three sites showed a statistically significance
decreasing trend while there was upward trend in some seasons of two
sites.  But, variation in all seasonal ET₀ time
series of Kilis site was not detected.

Keywords

GAP, reference evapotranspiration, regression analysis

References

• Abdul Aziz, O.I., Burn, D.H., 2006. Trends and variability in the hydrological regime of the Mackenzie River Basin. Journal of Hydrology, 319: 282–294.
• Allen, R.G., Pereira, L.S., Raes D., Smith, M., 1998. Crop Evapotranspiration (guidelines for computing crop water requirements): FAO Irrigation and Drainage Paper No. 56.
• Dinpashoh, Y., Jhajharia, D., Fakheri-Fard, A., Singh, V.P., Kahya, E., 2011. Trends in reference crop evapotranspiration over Iran. J. Hydrol. 399: 422–433.
• Espadafor, M., Lorite, I.J., Gavilán, P., Berengena, J., 2011. An analysis of the tendency of reference evapotranspiration estimates and other climate variables during the last 45 years in Southern Spain. Agric. Water. Manage. 98: 1045–1061.
• Hamed, K.H., 2008. Trend detection in hydrologic data: The Mann-Kendall trend test under the scaling hypothesis. Journal of Hydrology, 349: 350–363.
• Jaiswal, R.K., Lohani, A.K, Tiwari, H.L. 2015. Statistical analysis for change detection and trend assessment in climatological parameters. Environmental Processes, 2(4): 729-749.
• Liang, L.Q., Li, L.J., Liu, Q., 2010. Temporal variation of reference evapotranspiration during 1961–2005 in the Taoer River Basin of Northest China. Agricultural and Forest Meteorology, 150: 298–306.
• Pearson, E.S., Please, N.W., 1975. Relation Between the Shape of Population Distribution and the Robustness of Four Simple Statistical Tests. Biometrika 62: 223-241.
• Tabari, H., Talaee, P.H., 2011. Temporal variability of precipitation over Iran: 1966–2005. Journal of Hydrology, 396, 313–320.
• Tang, B., Tong, L., Kang, S., Zhang, L., 2011. Impacts of climate variability on reference evapotranspiration over 58 years in the Haihe river basin of north China. Agric. Water Manage. 98: 1660-1670.
• Yürekli, K., Ünlükara, A., Cömert, M.M., 2017. “Holt Yaklaşımı ile Referans Bitki Su Tüketiminin Mevsimsel Değişiminin Saptanması,” Gaziosmanpasa Journal of Scientific Research, 6(special issue), 75-81.