Abstract
Prespa Lake and Ohrid Lake constitute a hydraulic system shared between Albania, FYR of Macedonia and Greece. Karst rocks separate both lakes. The elevation of Prespa Lake is about 150 m higher than that of Ohrid Lake. Considering these facts, Cvijić formulated in 1906 the hypothesis that Prespa Lake recharges the St. Naum and Tushemisht springs at Ohrid lakeside. Environmental isotopes demonstrated that Prespa Lake recharges about 37–42 and 52–54% of water emerging in St. Naum, and Tushemisht springs, respectively. An artificial tracer experiment carried out in 2002 physically demonstrated the underground connection between both lakes. This experiment confirmed the supposed underground connection and brought important information about the groundwater velocity, transit time, and karst water conduits development.
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Acknowledgments
The authors wish to express their gratitude to the IAEA, Vienna, and in particular to the Isotope Hydrology Section for continuous care and financial support of the project RER/8/008 “Study of Prespa Lake Using Nuclear and Related Techniques”.
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Amataj, S., Anovski, T., Benischke, R. et al. Tracer methods used to verify the hypothesis of Cvijić about the underground connection between Prespa and Ohrid Lake . Environ Geol 51, 749–753 (2007). https://doi.org/10.1007/s00254-006-0388-9
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DOI: https://doi.org/10.1007/s00254-006-0388-9