Analysis of the mutual relation between „warm“ and „cold“ karst

ANALYSIS OF THE MUTUAL RELATION BETWEEN „WARM“ AND „COLD“ KARST AQUIFER WATER BASED ON THE RESULTS OF GROUNDWATER REGIME MONITORING
– EXAMPLE OF MILUŠINAC KARST SPRING (E SERBIA)

Slavko Špadijer¹, Dragoman Rabrenović¹, Miroslav Krmpotić¹

¹ Faculty of Mining and Geology, Belgrade, Serbia

ABSTRACT: This paper presents the most significant results of hydrogeological research conducted in 2004 and 2005 in the wider area of the karst spring Milušinac near Sokobanja. Delineation of groundwater source (horizontal and vertical), determination of groundwater flow patterns, recharge and discharge conditions has been accomplished by detailed hydrogeological research works. One-year groundwater regime monitoring was predominantly based on continual recording of groundwater yield and temperature, while physical – chemical characteristics of groundwater have been recorded through numerous chemical and bacteriological analyses. By the analyses of the research outcome, certain dependence of mixing ratio of „cold“ and „warm“ karst groundwater has been noticed through the inverse ratio of the springflow and water temperature. This ratio has been confirmed subsequently by calculating the general groundwater mass balance and analysis of retardation curve and, as a result, these data completely matched the data obtained by monitoring of springflow.

Key words: ascending spring, deep syphonal circulation, water balance, reserves, retardation curve