The Freshwater – saltwater zone dynamics in the sandune barrier, Buenos Aires. Study case: Pinamar
Abstract
DOI:
https://doi.org/10.59069/24225703ee016Keywords:
coastal aquifers, electrical conductivity, tideAbstract
The study of the freshwater-saltwater interface zone (FWSWI) is fundamental for the characterization of coastal aquifers and the evolution of freshwater reserves. In this work we study the factors that condition the dynamics of the IADAS in the locality of Pinamar. To carry out this task, a monitoring borehole was drilled on the coastal front, electrical conductivity (EC) profiling was performed, and continuous pressure, temperature and salinity sensors were installed. Information was collected from the tide gauge located in the town of Santa Teresita, while hydrometeorological data were obtained from a station located in the town of Pinamar. A correlation between high tide events and salinity, water level and temperature values were verified. The response times between the rise of the tide and the increase of the salinity are less than 8 hours, while the interval required to reach equilibrium again takes at least 2 days. Temperature variations are influenced by the prevailing climatic conditions at the time of the rising tide. The analysis of the relationship between storage variation and high tide events allows inferring that, when recharge events occur, there is a greater stability due to the increase of the hydraulic load on the IADAS. The study of IADAS behavior is an effective indicator for resource management.
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Copyright (c) 2024 Leandro Rodrigues Capitulo, Silvina Claudia Carretero, Maximiliano Emanuel Fabiano, María Samanta Anguiano, Eduardo Emilio Kruse
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