Behavior of the Guarani Aquifer System on the uruguayan-brazilian border

Abstract:

The Guarani Aquifer System (GAS) is a transboundary groundwater reservoir shared by Brazil, Argentina, Paraguay and Uruguay. The study presented here was performed in an area of the GAS covering an area of 650 km(2), centered in the cities of Rivera (Uruguay) and Santana do Livramento (Brazil). In that region the sandstones of the Tacuarembo/Rivera Formation that forms the GAS outcrop to the surface receiving direct recharge from precipitation and indirect recharge from fractured basalts that locally overlie the sandstones. Piezometric levels, geologic/structural analysis and hydrogeochemical analyses, along with background information of the area, were used to construct the conceptual model of the system hydraulic behavior. Numerical simulations allowed to validate the hydrogeologic conceptual model, to reproduce the current system behavior, and to estimate an approximate recharge rate. Recharge …

Año de publicación:

2008

Keywords:

Fuente:

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