Year: 2025
Type: conference-paper
Abstract: Evapotranspiration (ET) is a key process in hydrology, agriculture, and managing water resources. It affects things like irrigation planning and climate research. In this study, we used a temperature-based variation of the Penman-Monteit (PMtl) equation and the Hargreaves (HARG) equation to compare with the standard Penman-Monteith (PM) method for estimating ET. The data used for the calculation of evapotranspiration was collected from the meteorological station in Novi Sad during the period from 1980 to 2015. ET results were statisticly analyzed using Pearson’s correlation coefficient (r), coefficient of determination (R²), Nash-Sutcliffe efficiency (NSE), index of agreement (d), root mean square error (RMSE), mean absolute error (MAE), relative squared residual (RSR), relative error (RE), and the percent bias (PBIAS) to assess the reliability and validity of the applied methods. Findings in this study showed r=0.99 for PMtl and HARG, respectively. Using PMtl RMSE = 0.24 was obtained and RMSE=0.41 using HARG. Moreover findings showed MAE=0.17 for PMtl and MAE=0.32 for HARG. A high r value and low RMSE and MAE values indicate that PMtl is more reliable than HARG method. The temperature-based Penman-Monteith (PMtl) method has proven to be a more accurate and reliable alternative to the reference method in data-limited conditions, while the Hargreaves method can be used with caution due to its slightly lower accuracy.
Authors: Rastislav Trajkovic, Marija Milićević
Institution: University of Nis
Language: English
Subfield: Global and Planetary Change
Field: Environmental Science
Domain: Physical Sciences
SDG: Climate action
Open Access status: gold
OpenAlex ID: W4414143786