engleski

Definition of catchment area in karst: case of the rivers Krčić and Krka, Croatia

The study area consists of the spring zones of the Krčić, Krka and Cetina river catchments located in the Dinaric karst, Croatia. Classical hydrological approaches and some newer time and frequency domain methods are used in order to validate the existing hypotheses both qualitatively and quantitatively, and these contribute to factual information about the hydrological behavior of the catchments. The groundwater recharge rates are calculated by a mathematical model based on Palmer’ s soil-moisture balance method. The values of parameters of groundwater recharge model are estimated by the spectral method. The calculated monthly and annual groundwater recharge rates form the basis for estimating the hydrologic catchment areas of the spring zones and also for the determination of quantitative relationships between the catchments.

catchment area; Croatia; effective rainfall; groundwater recharge; karst hydrology; karst spring

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