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Environmental Earth Sciences

, Volume 74, Issue 5, pp 4303–4315 | Cite as

Simulation of springs discharge from a karstic aquifer (Crete, Greece), using limited data

  • E. Steiakakis
  • D. Vavadakis
  • M. Kritsotakis
Original Article

Abstract

Five major groups of springs and more than ten pumping wells comprise the main discharge outlets of Agyia karstic aquifer (W. Crete, Greece). The mean annual discharge of the springs is 76 × 106 m3, while 12 × 106 m3 of water are pumped annually from Myloniana and Agyia’s well fields for public water supply and irrigation. The area is almost composed of entirely karstified carbonate rocks (limestones with dolomites), and karstic drainage contributes to infiltration and replenishment of the aquifer. The present work studies the groundwater flow system in the region to investigate the impact of intensive exploitation of the aquifer especially during dry periods (low water table conditions). Due to the lack of sufficient hydrogeologic data, a part of the aquifer extending upwards of Agyia springs was chosen for building the conceptual and numerical model. The groundwater flow was simulated by establishing a reproduction of the measured water heads in the field and the springs discharge. The appropriate set of boundary conditions and the repetition of the model’s verification in different dry periods resulted in a sufficiently reliable model. This can be used as a tool to assess different water resource management options during dry periods, when the demand for water is high.

Keywords

Karst Springs Numerical modelling Steady state simulation Groundwater management 

Notes

Acknowledgments

The authors wish to thank the Region of Crete (Directorate of Water), DEYACH (Municipal Drinking and Waste Water Services of Chania), YΕΒ (Land Reclamation Service) and OADYK (Organization for the development of Western Crete) for providing the initial data for this research.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Mineral Resources Engineering, Laboratory of Applied GeologyTechnical University of CreteChaniaGreece
  2. 2.Decentralized Administration of CreteIraklionGreece

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