Análisis de la descarga submarina en dos sectores de la costa oriental de la Provincia de Buenos Aires, Argentina

Silvina Carretero; John Rapaglia; Leandro Rodrigues Capítulo; Eduardo Kruse

doi:10.30550/j.agl/2023.34.2/1838

Authors

Silvina Carretero CONICET, CEIDE, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP)
John Rapaglia Biology Department, Sacred Hear University (EEUU)
Leandro Rodrigues Capítulo CONICET, CEIDE, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP)
Eduardo Kruse CONICET, CEIDE, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata (UNLP)

DOI:

https://doi.org/10.30550/j.agl/2023.34.2/1838

Keywords:

Coastal aquifer, submarine groundwater discharge, radon

Abstract

Submarine groundwater discharge (SGD) is a natural hydrological process which occurs along the continent–ocean interface, and plays an important role in coastal dynamics. SGD along the western coast of Buenos Aires Province, Argentina (Partido de La Costa and Pinamar) was quantified via a mass balance of ²²²Rn as a tracer and hydrogeological flow maps.²²²Rn activity was measured in wells and along a transect 300 m from the coastline. Groundwater depth was measured in wells and groundwater contour maps were made. Calculated flux of SGD for La Costa was 0.37 m³/m/d according to hydrodynamics and of 3.5 m³/m/d according to the radon mass balance. For Pinamar these values were of 0.66 and 0.55 m³/m/d respectively. The presence of suspended sediments from the Río de la Plata influenced the radon activity, increasing discharge values near La Costa, meanwhile in Pinamar the absence of the sediments allowed for a more accurate comparison or methodologies.

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