(groundwater regime, catchment area, real evapotranspiration, dynamic volume, water budget, Belo Vrelo, Serbia)
series, we developed a model whose outputs,apart from mean monthly spring discharges, include daily real evapotranspiration rates, catchment size anddynamic volume variation during the analytical period. So far the model hasMountain, was selected for the present case study. Key words: groundwater regime, catchment area, real evapotranspiration, dynamic volume, water budget,Belo Vrelo, Serbia.Апстракт: Довољно дуг низ осматрања режима истицања
. Apart from extending the length of existing time series, the model provides the catchment size, real evapotranspiration ratesand variations in karst spring dynamic volume in theanalytical period for which gaps in the existing