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Saltwater intrusion in an irrigated agricultural area: combining density-dependent modeling and geophysical methods

  • N. N. Kourgialas
  • Z. Dokou
  • G. P. Karatzas
  • G. Panagopoulos
  • P. Soupios
  • A. Vafidis
  • E. Manoutsoglou
  • M. Schafmeister
Original Article

Abstract

Saltwater intrusion is one of the most important water quality problems in coastal aquifers, especially in areas with increased water demands. Geophysical techniques can provide a non-invasive and cost-effective approach for determining the geometrical characteristics of an aquifer and for guiding the saltwater intrusion modeling process and in turn reducing the model’s inherent uncertainty. In this work, the above concept was applied in the Tympaki basin in Heraklion, Greece. The transient electromagnetic method was used to obtain an accurate 3-D geomodel (bedrock geometry and fault detection) of the basin. This, in turn, was used to guide the construction of a density-dependent groundwater flow and transport simulation model. The results show significant advancement of the saltwater intrusion front in the northern part of the study area, while the phenomenon is less pronounced in the central and southern parts. This is mainly attributed to the combined effect of the fault in the northern part of the basin, the uplifted Neogene deposits in the central part and the freshwater inflow from the Festos corridor in the southern part.

Keywords

Saltwater intrusion Groundwater Density-dependent modeling Geophysical methods Simulation 

Notes

Acknowledgments

Funding of this research work was within the framework of BLACK SEA ERA.NET—Pilot Joint Call, Networking on Science and Technology in the Black Sea Region, CLEARWATER, Thematic Focus 1.2 Water pollution prevention options for coastal zones and tourist areas, geophysiCaL basEd hydrogeologicAl modeling to pRevent pollution from sea WATER intrusion at coastal areas. The research project AQUADAM (Archimedes III) is implemented through the Operational Program “Education and Lifelong Learning” and is co-financed by the European Union (European Social Fund) and Greek national funds.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • N. N. Kourgialas
    • 1
  • Z. Dokou
    • 1
  • G. P. Karatzas
    • 1
  • G. Panagopoulos
    • 2
  • P. Soupios
    • 3
  • A. Vafidis
    • 2
  • E. Manoutsoglou
    • 2
  • M. Schafmeister
    • 4
  1. 1.School of Environmental EngineeringTechnical University of CreteChaniaGreece
  2. 2.School of Mineral Resources EngineeringTechnical University of CreteChaniaGreece
  3. 3.Department of Environmental and Natural Resources EngineeringTechnological Educational Institute of CreteChaniaGreece
  4. 4.Institut für Geographie und GeologieGreifswald UniversityGreifswaldGermany

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