Resumo

BARRANQUERO, Rosario Soledad; VARNI, Marcelo; RUIZ DE GALARRETA, Alejandro  e  BANDA NORIEGA, Roxana. Aporte de la hidroquímica al modelo conceptual del sistema hídrico subterráneo: Tandil, Argentina. Geoacta [online]. 2012, vol.37, n.2, pp.130-146. ISSN 1852-7744.

This work is aimed to describe and analyze the chemistry of groundwater in a study area located in Langueyú creek basin, in order to contribute with the design of the conceptual model of the groundwater system. To achieve this objective, the phreatic levels were measured and groundwater samples were taken with a quaterly frecuency in a monitoring network of thirty wells. The specific electrical conductivity, pH, major ions and nitrate, were determined. The results showed that groundwater of the study area is young, because of its low salinity and the predominance of bicarbonate ion. The hydrochemical variables, as well as hydrodynamic ones, have a significant dependence of hills, foothills and plains zones, defined through geomorphological characteristics. It is evident that the study of hidrochemistry can be used as a complementary tool to the hydrodynamic analysis, enabling even display behaviors that are not so evident with the latter.

Palavras-chave : Groundwater; Hydrodinamic; Hydrochemistry; Langueyú creek basin.

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