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The objective of the paper is to identify the boundaries of hydrogeologic   structures in which natural mineral waters occur, using two examples: old   mineral water (Sijarinska Banja) and young mineral water (Selters Banja). The   research addresses the distance from recharge zones, depth of occurrence, and   points of discharge. Apart from the three spatial dimensions, the study also   includes the time dimension - water age. The following parameters are   examined: geologichydrogeologic conditions in the places of occurrence of   mineral water, connection between mineral water and permeable fault zones,   distance of surface water divides, previously-defined maximum possible depths   of occurrence, possible flow rates, and the determined age. If the flow   followed a straight line, the maximum distance of the recharge zone would be   up to 7 m for the young and up to 11 km for the old mineral water. However,   it is obvious that this is never the case in fractured systems, given that   water travels much longer distances from the point of entry to the point of   drainage from aquifers. Assessment of geologic-hydrogeologic and hydrodynamic   conditions, relative to the determined age of the mineral water, leads to the   conclusion that the distance between the recharge and drainage zones can be   less than 5 km. The paper shows that insight into the depth of infiltration   into permeable fault zones can also be gained by studying the depth of   circulation relative to known hydrodynamic zones. The inference is that the   largest amount of groundwater is restored in the hydrodynamic zone of slow   groundwater renewal, which is below a depth of 1.5 km at Sijarinska Banja and   below 1.3 km at Selters Banja

Hydrogeologic structures in two Serbian spa towns - Sijarinska Banja and Selters Banja