Contribution of siotopic tools to the numerical simulation of the Mar del Plata Coastal Aquifer, Argentina.

BOCANEGRA, E.M.; POOL M.; CARRERA J.; MARTÍNEZ D.E

Mónaco

Simposio; International Symposium on Isotope Hydrology, Marine Ecosystems and Climate Change Studies.; 2011

International Atomic Energy Agency

Over-exploitation in the coastal aquifer in Mar del Plata, Argentina, leads to a seawater intrusion process affecting groundwater by salinization. The goal of this paper is to show the contribution of the isotopic techniques to generate a numerical tool that reproduces the successive management strategies of groundwater resources. On the basis of the hydrogeological conceptual model, a numerical model was constructed. It is formed by a multilayer aquifer 2.5D in the urban area with 2 layers separated by an aquitard, and a monolayer aquifer 2D in the rest of the basin. Isotopic techniques contributed to the identification of different terms of recharge that were incorporated in the numerical model. Flow simulation reflects the evolution of piezometric heads. Chloride transport simulation represents the salinization process due to seawater intrusion and the subsequent backward of the interface due to the abandonment of salinized wells. Results of numerical simulation allow to confirm the conceptual model and to reproduce the management strategies.