GLEJDIS HAJDINI1, DHURATA PREMTI, ILIRJAN MALOLLARI, SHAMAILA ZIA-KHAN, KLAUS SPOHRER
KEYWORDS : ETO calculation, data analysis, FAO, solar radiation, wind speed, humidity.
Abstract :
This study focuses on data analysis and assessment of the influence of meteorological parameters on Evapotranspiration (ETo) values calculated by the FAO Penman-Monteith Equation on the daily time interval. This equation is known as a reliable method for estimating ETo due to the study of meteorological parameters such as temperature, humidity, wind speed, solar radiation, sunshine hours. Data analysis was performed for the terms that influence the final ETo equation by FAO. Meteorological data were collected from the meteorological station installed in Prrenjas, Albania. Through data analysis and assessment, this study shows that there is a strong positive correlation between ETO and wind speed, sunshine hours, radiation, solar declination and sunset hour angle. A slightly positive correlation between ETO and temperature, solar radiation. A negative correlation was observed with humidity and daylight hours. Relative humidity showed a strong negative correlation with ETo, highlighting its role in reducing evapotranspiration under high humidity conditions. The highest ETo value (14.196 mm/day) was observed in March, while the lowest (1.0089 mm/day) was observed in February, reflecting seasonal variability. These findings highlight the importance of monitoring multiple meteorological parameters for accurate irrigation planning in regions with similar climatic conditions.
The findings of this study serve to clarify which factors directly affect and have the greatest impact, which we should have in monitoring the plant irrigation system in the study area.