Evaluation of recharge origin of groundwater in the Alazani-Iori basins, using hydrochemical and isotope approaches

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George Melikadze
Mariam Todadze
Mariam Todadze
Sopio Vepkhvadze
Nino Kapanadze
Alexandre Chankvetadze
Tamar Jimsheladze

Abstract

85 groundwater, stream water and lake water samples were analysed in 2013 for composition of major ions and isotopes 18O, 2H and 3H in the Alazani-Iori area, eastern Georgia. Three groups of groundwaters were identified, revealing the dominant evolution in mineralization from Northwest to Southeast, with major increase in the Shiraki syncline area. The geochemical patterns among these groups evolve from Ca(Mg)/HCO3 type in the Kvareli aquifer to Na/SO4(Cl) type in the Shiraki syncline. Almost all aquifers in the study area contain admixture of older waters recharged prior to the 1950’s or paleowaters with no Tritium and low d18O values between -11 and -13 per mil SMOW. Although most of the artesian boreholes are up to 500m deep, their groundwaters belong to different hydrochemical and isotopic groups and must be considered with respect to local stratigraphy. Whereas the groundwaters in the Alazani valley artesian aquifers are concluded to be of a good quality for drinking, it is recommended to enhance the use of waters from the karstic formations such as the Dedoplitskaro Plain for alternative drinking water sources in the Shiraki –Iori basin.

Published: Mar 26, 2015

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How to Cite
Melikadze, G., Todadze, M., Todadze, M., Vepkhvadze, S., Kapanadze, N., Chankvetadze, A., & Jimsheladze, T. (2015). Evaluation of recharge origin of groundwater in the Alazani-Iori basins, using hydrochemical and isotope approaches. Journals of Georgian Geophysical Society, 17(A). Retrieved from https://ggs.openjournals.ge/index.php/GGS/article/view/1627
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References

1. Shotadze M., Barnovi E. (2011) Integrated Natural Resources Management in Watersheds (INRMW) of Georgia Program. Technical Report, USAID No.CA # AID-114-LA-10-00004, 79 pp.

2. Buachidze, I.M., Zedginidze, S.N. (1985). Hydrogeology and Perspectives of Groundwater Use in the Alazani-Agrichai aquifer.Tbilisi, 335pp. (in Russian).

3. Gaprindashvili, T. (2002). Groundwater Resources of the Alazani Basin. Technical Report. Subcontract No. 3335-105-005 under USAID/DAI Prime contract No. LAG-I-00-00017-00 „Water Management in the South Caucasus Project.““Gorgasali” Joint Stock Company, Tbilisi, Georgia, 14pp.

4. Beselia, B.N. (1988). Preliminary survey on the appearance of groundwaters - Quaternary alluvial-prolluvial confined and Upper Jurassic and Lower Cretaceous aquifers between the rivers Chelti and Durudji. Ministry of Geology of USSR, Tbilisi, 3 volumes. (unpublished, in Russian)

5. Bagoshvili, G.N. (1990). Report on hydrogeological survey 1:50000 on the southern slope of the Greater Caucasus. Ministry of Geology of USSR, Tbilisi, 2 volumes, 95 and 163 pp. (unpublished, in Russian)

6.Buachidze, G. (2005). Transboundary Artesian Basin of Georgia. Presentation at the conference EURO-RIOB 2005, Namur, Belgium, 29 Sept-1 Oct 2005.http://www.riob.org/IMG/pdf/Euro-RIOB_29sept2005_Buachidze.pdf

7. Pilot project for re-activation of groundwater level and quality monitoring network of Alazani-Agrichai aquifer, 2013. Technical Report of the Czech Official Development Assistance “Aid for Trade” Program between National Environmental Agency of Georgia and AQUATEST a.s. (J. Sima, ed.) 59p, December 2013.

8. Melikadze G., Chelidze T. , Zhukova N., Rozanski K., Dulinski M., Vitvar T. (2009). Using nuclear technology for environmental safety and sustainable development of water resources in Borjomi region (Southern Georgia). Journal of Georgian Geophysical Society, Issue (A), Physics of Solid Earth 13a, 17-25.

9. Melikadze G., Chelidze T., Jukova N., Malik P., Vitvar T. (2011). Using Numerical Modeling for Assessment of Pollution Probability of Drinking Water Resources in Borjomi Region (Southern Georgia). In: Climate Change and its Effects on Water Resources, Issues of National and Global Security (Baba A., Tayfur G., Gunduz O., Howard K.W.F., Fridel M.J., Chambel A., eds.), NATO Science Series. Springer. ISBN:978-94-007-1145-7. Chapter 29, 267-275.

10. Gudjabidze, G.E. (2003). Geological Map of Georgia. Scale 1:500.000. Georgian State Department of Geology, Tbilisi.

11. Vitvar, T, Aggarwal, P.K.,Herczeg, A.L.(2007). Global Network is launched to monitor isotopes in rivers. EosTrans. AGU 88:325–326.