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    STUDIA GEOLOGIA - Issue no. 1 / 2007  
         
  Article:   ORIGIN OF GROUNDWATER IN THE BUDAPEST THERMAL KARST REGIME BY PRELIMINARY ENVIRONMENTAL ISOTOPE DATA.

Authors:  ISTVAN FÓRIZS, JÓZSEF DEÁK, GYÖRGY TÓTH, ÁRPÁD LORBERER. 		 
       
         
  Abstract:  The fault-line of Danube at Budapest is the discharge area of a regional thermal karst water flow regime, where the warm (deep) and the luke-warm (relatively shallow) components are mixed. The chemistry of the karstic water varies in a wide range, but the relatively high sodium content (up to 200 mg/l) is characteristic mainly for the warm component. According to the regional karst water flow model (Tóth, 2007) the water of the warm component reaches considerable depth where it mixes with a small portion of very saline fossil seawater while it is warmed up to about 80 to 100 ºC.  
         
     
         
         
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