The thesis presents three selected methods of measurement and calculation of the evapotranspiration on research plot at Hajdrihova 28 in Ljubljana. First method is measurement by evaporation pan type A and the other two methods are empirical equations for potential evapotranspiration calculation: FAO Penman-Monteith equation and Thornthwait equation.
The results obtained for all three methods are compared with each other. Calculated results according to the FAO Penman-Monteith equation were compared also to those from
Slovenian Environment Agency meteorological station Ljubljana-Bežigrad. The results showed considerable differences between methods. The lowest values were obtained with the measurement by evaporation station type A, slightly higher values were calculated by simple Thornthwait equation and the highest by FAO Penman-Monteith equation.
Analysis of the influential factors showed that on the research plot the most influential factor is solar radiation, followed by relative humidity. Lower impact is shown by air temperature and wind speed.