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Environmental Geology

, Volume 56, Issue 6, pp 1029–1040 | Cite as

Sustainable management of Mogan and Eymir Lakes in Central Turkey

  • Ozlem Yagbasan
  • Hasan YazicigilEmail author
Original Article

Abstract

Mogan and Eymir Lakes, located 20km south of Ankara in Central Turkey, are important aesthetic, recreational, and ecological resources. Dikilitas and Ikizce reservoirs, constructed on upstream surface waters, are two man-made structures in the basin encompassing an area of 985km2. The purpose of this study is to quantify groundwater components in lakes’ budgets and to assess the potential impacts of upstream reservoirs on lake levels for sustainable management of the system. Available data have been used to develop a conceptual model of the system. A three-dimensional groundwater model, incorporating a lake component, has been developed for the system. The model has been calibrated successfully under transient conditions over a period of 6years using monthly periods. The results show that groundwater inflows and outflows have the lowest contribution to the overall lakes’ budget. The model has been subsequently used to evaluate the impacts of upstream reservoirs. The results show that these reservoirs have a significant effect on lake stages but not on groundwater levels. A trade-off curve between the quantum of water released and the average stage in Lake Mogan has been developed to enhance decision makers’ ability for sustainable management of the system in the long term.

Keywords

Mogan and Eymir Lakes Sustainability Lake and aquifer interaction Simulation Calibration 

Notes

Acknowledgments

The authors thank Ismail Kucuk from Electrical and Survey Works General Directorate for providing data used in this study. Special thanks are also due to the staff of V. District of the State Hydraulic Works, General Directorate of Mineral Research and Exploration and Turkish State Meteorological Service. The authors extend their gratitude to the Islem Geographical Information System Company for the valuable support during the preparation of the base maps of the research. The constructive comments of the reviewers are gratefully appreciated.

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  1. 1.Institute of Natural SciencesGazi UniversityAnkaraTurkey
  2. 2.Department of Geological EngineeringMiddle East Technical UniversityAnkaraTurkey

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