Author(s): V. Giannopoulos; E. Andreadakis; E. Skourtsos; C. Filis
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Abstract: The present study aims to construct an integrated hydrogeological model in the wider area covered by the municipalities of Marathon, Dionisos, and the eastern part of Oropos, in north-eastern Attica. The study area consists mainly of the non-metamorphic formations of the Sub-Pelagonian Unit and the metamorphic rocks of Attic-Cycladic massif with a significant neotectonic overprint (Lozios, 1993). The carbonate platforms of the Triassic limestones and marbles due to their thickness and fractured mass are capable of developing karstic forms with the ability to contain and transfer water (Morphis, 1995, Mellisaris and Stavropoulos, 1999). Moreover, the Neogene lacustrine formations are capable of hosting big amounts of water due to their significant extent and thickness. Researchers studying the quality of groundwater in Neogene and Quaternary formations have detected high concentrations of pollutants and specific toxic trace elements including Arsenic, Chromium, Uranium, and Vanadium (Stamatis et al., 2011). The Arsenic bioaccumulation was detected in the lacustrine travertine limestones of Kalamos and Varnavas and its origin is natural (Kampouroglou and Economou 2017). Furthermore, the karstic systems that develop in the study area also require specific protection (Cost Action 65,1995) because of the potential for pollution and contamination, as well as flooding. In this study, modeling is used to assist in the following topics: i) investigating the hydraulic interconnections between the geological formations of the area, ii) the hydrodynamic pattern of the aquifer systems and the aquifer mass transport evolution. The final objectives of this study are, a 3D model of the geology and tectonic structure of the area, a 3D model of the aquifers and adjacent recharge area, a characterisation of the aquifers and their interconnections, and a model of groundwater drainage.
Year: 2022