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Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
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Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
Faculty of Civil Engineering and Architecture, University of Nis , Niš , Serbia
Evapotranspiration is a key parameter of the agrohydrological systems and is critical factor for water resources planning. The objective of the study is to analyze the sensitivity of the monthly reference evapotranspiration (ET0) to climate variables. Data were used for Nis urban conditions, for the period from July 2022 to December 2024. Sensitivity analysis was based on the calculation of sensitivity coefficients for four meteorological parameters: minimum and maximum air temperature (Tmin and Tmax), wind speed (U2) and solar radiation (Rs). The ET0 values were defined using the FAO 56 Penman-Monteith method. The results of the sensitivity coefficients showed that the two variables – Rs and Tmax have the greatest influence on ET0, with the values of coefficients of 0.423 and 0.374, respectively. The analysis showed that Tmin has the lowest influence on ET0, in defined conditions.
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