Abstract
Summary Dynamics of chemical composition of Dombrovsky quarry of Kalush-Golinsky potassium salt deposit during operation and after its decommissioning was analyzed. The change of hydrochemical conditions in the mining excavation is predicted. Insignificant changes in the concentrations of major brine ions during 1968–2007 are observed. Over the last decade, concentrations of major ions have decreased from 2. 4 to 9. 4 times. Since 2008, the tendency of the water surface layer desalinization of Dombrovsky quarry has been determined. The rate of salinity reduction per year is 0. 4 g/L. If the rate of the quarry filling is maintained, the water mirror will rise in 5 years to a maximum mark of 295 m. The predicted salinity in 2027 is 16. 3 g/L. The conclusion on the threat of contamination of the gravel-pebble aquifer used for local water supply with brines of the Dombrovsky quarry was made.
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