Quantification of Evapotranspiration by Calculations and Measurements Using a Lysimeter

Evapotranspiration is one of the key elements water balance in nature. It significantly influences supply unsaturated zone a soil profile. The source for biosphere. aim this study to measure, calculate and analyze course actual evapotranspiration, precipitation dew totals as well flows at lower boundary change content specified volume. measurements are used verifying results numerical simulation. methods were chosen based on hypothesis that dynamics changes result interactions between atmosphere, plant cover. quantified by balance, lysimeter simulation model HYDRUS-1D, version 4. abovementioned parameters East Slovakian Lowland, with an hourly time step during years 2017, 2018 2020. have shown evapotranspiration exceeded all monitored periods, specifically 22% 14% 2019, 10% deficit was compensated capillary inflow from groundwater level zone. A verification measurement has imprecise relation quantification This inaccuracy manifested higher value which average 11%. performance mathematical assessed satisfactory analysis regime.