The use of geochemical ratios in groundwater quality assessment: the case of the Thriassion Plain, Attica, Greece

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Published: Dec 6, 2019
DOI: https://doi.org/10.12681/bgsg.20938
Keywords:
coastal aquifer hydrochemistry seawater intrusion Thriassion Plain
Panayota Makri
NKUA
https://orcid.org/0000-0003-3041-918X
Dimitrios Hermides
Agricultural University of Athens
Maria Psychogiou
Agricultural University of Athens
Aikaterini Ermidou
Agricultural University of Athens
Abstract

This paper is an effort to assess the groundwater quality and the geochemical processes mainly using the Chadha’s diagram which classifies natural waters and documents the Piper and extended Durov diagrams. Chadha’s diagram is a useful tool to interpret groundwater geochemical processes because it is produced by simple spreadsheets excel files. The example of hydrochemical analyses were given from groundwater samples of the Thriassion Plain. To attend our objective, 38 groundwater samples were collected. Hydrochemical sections, XY diagrams, distribution maps of ionic ratios as well as the Gibbs diagrams were used to identify origin of salinity and the hydrogeochemical processes that have taken place. The Gibbs diagrams have shown that evapotranspiration (ET) and rock-water interaction play an important role to the increase of groundwater salinity. The interpretation of Chadha diagram highlights that the stratigraphic factors and especially the clay strata occurrence have isolated fresh groundwater from seawater. The abundant occurrence of clay deposits to the depth of the plain work as barriers to direct seawater intrusion. Good quality groundwater identified confirms the important role of clay strata. Reverse cation exchange, is the predominant geochemical process in the Thriassion Plain aquifers, whereas evapotranspiration (ET) and rock-water interaction play an important role to the increase of groundwater salinity.

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  • Environmental Geology
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Author Biography
Maria Psychogiou, Agricultural University of Athens
Assistant Professor
References
Chadha, D.K.A., 1999. Proposed new diagram for geochemical classification of natural waters and interpretation of chemical data, Hydrogeology Journal, 7(5), 431–439.
Christides, A., Mavrakis A., Mitilineou A., 2011. A case of intense seawater intrusion to aquifer of the Thriasio Plain. Greece, Proceedings of the 12th International Conference on Environmental Science and Technology (12th ICEST), vol B: 152-159.
Dimitriou, E., Mentzafou, A., et al. 2011. Monitoring of the ecological quality of Koumoundourou Lake and designing of management, restoration and development actions. 2nd Technical report, IIWHCMR, p. 310.
Dounas, A, 1971. The geology between Megara and Erithres area, PhD National and Kapodistrian University of Athens (in Greek), 141 p.
Dounas, Α., Panagiotides G., 1964. Precursor report on the hydrogeological conditions of Thriassion. Institute of Geology and Subsurface Research, Athens (in Greek) 28 p.
Foumelis, M., 2019. Velocity field and crustal deformation of broader Athens plain (Greece) from dense network. Journal of Applied Geodesy, 13 (4), 305-316.
Ganas, A., Pavlides, SB., Sboras, S., Valkaniotis, S. Papaioannou, S., Alexandris, G.A., Plessa, A. Papadopoulos, G.A., 2004. Active fault geometry and kinematics in Parnitha Mountain, Attica, Greece. Journal of Structural Geology, 26 (11), 2103-2118.
Gibbs, R.J., 1971. Mechanisms controlling world water chemistry. Sci J, 172 (3), 870-872.
Goumas, G., 2006. Investigation of the structure of Thriassion Plain based on geophysics, MSc thesis, University of Athens pp 190.
Hermides, D., 2018. Hydrogeological conditions of the Thriassion Plain basin with emphasis on the geohydraulic characteristics of the aquifers and the groundwater quality. PhD thesis, Agricultural University of Athens, pp 283.
Hermides, D., Stamatis, G., 2017. Origin of halogens and their use as environmental tracers in aquifers of Thriassion Plain, Attica, Greece. Environ Earth Sci., 76, 306. https://doi.org/10.1007/s12665-017-6611-z
Hermides, D., Mimides, T., Stamatis, G., 2016. Contribution to hydraulic characteristics of plio-pleistocene deposits of Thriassion plain of Attica, Bul. Geol. Soc. Greece, 50 (2), 967-976, doi: http://dx.doi.org/10.12681/bgsg.11801
Iliopoulos, G., Stamatis, G., Stournaras, G., 2010. Marine and human activity effects on the groundwater quality of Thriassion Plain, Attica, Greece Proceedings of the 9th International Hydrogeological Congress of Greece, 2, 409-416.
Kambouroglou, E., 1989. Eretria paleogeographic and geomorphological evolution during Holocene relationship of the natural environment and ancient settlements, PhD thesis National and Kapodistrian University of Athens, pp 493.
Kaminari, M.A., 1994. Geochemical pilot survey of the lands of the wider region of Eleusis (Thriassion Plain) to detect pollution from heavy metals, IGME, Athens.
Katsikatsos, G., Mettos, A., Vidakis, M., Dounas, A., Pomoni, F., Tsaila-Monopolis, S., Skourtsi-Koroneou, V., 1986. Geological map of Greece, in scale 1:50.000, ‘‘Athina-Elefsis’’ sheet, IGME publication, Athens.
Kounis, G., Siemos N., 1990. Hydrogeological research of the aquifers of Thriassion Plain, for the water supply of Hellenic Refinery (In Greek), IGME, Athens, pp 39.
Kraft, J., Kayan I., Erol O., 1980 Geomorphic reconstructions in the environs of ancient Troy, Science 209, (4458), 776-782.
Lambeck, K., 1996. Sea level change and shore-line evolution in Aegean Greece since Upper Palaeolithic time. Antiquity, 70, (269), 588–611.
Lioni, A., Stournaras G., Stamatis G., 2008. Degradation of Groundwater quality of Thriassion Plain through Natural Factors and human activity, Proceedings of the 8th Hydrogeological Congress of Greece, 2, 577-586.
Makri, P. 2008. Investigating the pollution from BTEX in the groundwater of Thriassion Plain, PhD National and Kapodistrian University of Athens, pp 260.
Mariolakos, H., Theocharis, D., 2001. Shifting shores in the Saronic Gulf during the last 18,000 years and the Kychreia paleolimni. Proceedings of the 9th International Conference, Athens, Bul. Geol. Soc. Greece, XXXVI, 1, 405-413.
Mariolakos, H., Fountoulis, I., Sideris, C., Chatoupis, T., 2001. Morphoneotectonic structure of Parnes’ Mt of Attica Proceedings of the 9th International Congress, Athens, Bul. Geol. Soc. Greece, XXIV/1, 183-190.
Mimides, Th., 2002. Pollution Source and suggestions on environmental upgrading of Lake Koumoundourou. Environmental Impact Study, Agricultural University of Athens, for the Prefecture of Western Attica (in Greek), 22 p.
Paraschoudes, Β., 2002. Hydrogeological study of western Attica (Megara- Thriassio Field). Ministry of Agriculture, Athens 165 p.
Skianis, G., Noutsis B., 2008. Geophysics study in Thriassion Plain. IGME, Athens (in Greek), 176 p.
Zacharias, A., Sarandakos K., Andre C., 2003. Report on sample drilling and Morphotectonics study in the area around Koumoundourou Lake, 2nd Technical Report, Hellenic Center of Marine Research (ELKETHE) /IIW, Anavyssos Attica, 72p.