Abstract

The water supply in the Romanian counties of Olt and Valcea is mainly from groundwater from a deep aquifer system in Pliocene formations. Isotope analyses have been used to establish the supply area of the deep aquifer system. The age of the groundwater has been estimated for two samples by using 14C analysis. A simplified numerical model for a north–south cross-section has provided global values for the hydraulic conductivity and effective porosity of the aquifer system. The groundwater from permeable horizons deeper than 120–140 m is highly mineralised and is, therefore, inappropriate for use as a water supply. Because groundwater resources are limited, the water supply for industry and domestic use in urban regions cannot increase too much. Thus, the deep aquifer system could also be used as a water supply for rural regions.

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