RADON AND GEOCHEMICAL PRELIMINARY MODEL TO ASSESS INTERACTIONS BETWEEN GROUNDWATER AND SURFACE WATER IN A PAMPEAN STREAM

BLARASIN, M. T; PANARELLO, H.O.; DUCOS, E. I.

Viena

Simposio; International Symposium on Isotope Hydrology: Revisiting Foundations and Exploring Frontiers - CN225; 2015

International Atomic Energy Agency

Abstract: The objective of this work is to characterize the hydraulic and geochemicalrelationships between surface water and groundwater using Rn-222 to validate the summerhydrological model in the Ají stream basin (Córdoba, Argentina). The aquifer-streamhydraulic relationships were effluent/influent, varying spatially as a result of geomorphology,climate and human actions. Isotopic values of d2H and d18O show that groundwater andstream samples lay in a mixing line. Geochemical numerical model and Rn-222 indicate a small contribution from the aquifer in the summer season (in the order of 2%).