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Author Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C.
Title Isotope hydrology and hydrogeochemical modeling of Troodos Fractured Aquifer, Cyprus: The development of hydrogeological descriptions of observed water types Type Journal Article
Year 2020 Publication Applied Geochemistry Abbreviated Journal
Volume 123 Issue (down) Pages 104780
Keywords Isotope hydrology, Hydrogeochemical modelling, Hydrochemistry, Kargiotis, Troodos
Abstract The origin of groundwater recharge and subsequent flow paths are often difficult to establish in fractured, multi-lithological, and highly compartmentalized aquifers such as the Troodos Fractured Aquifer (TFA). As the conjunctive use of stable isotopes and hydrogeochemical data provides additional information, we established a monitoring network for stable isotopes in precipitation in Cyprus. The local meteoric water line, altitude effect and seasonal variation of stable isotopes in precipitation are derived from monitoring data. Stable isotopes and hydrogeochemical data are combined to model water-rock interactions and groundwater evolution along a complete ophiolite sequence. As a result a generic hydrogeologic description for the observed water types is developed. Isotope hydrology was applied in conjunction with hydrogeochemical modelling in Kargiotis Watershed, a major north-south transect of the TFA. PHREEQC was used for hydrogeochemical modelling to establish generic descriptions for observed water types. Mean precipitation-weighted values from 16 monitoring stations were used to calculate the Local Meteoric Water Line (LMWL), which was found to be equal to δ2H = (6.58 ± 0.13)*δ18O + (12.64 ± 0.91). A general decrease of 1.22‰ for δ2H and 0.20‰ for δ18O in precipitation was calculated per 100 m altitude. A generic groundwater evolution path was established: 1. Na/MgClHCO3, 2. MgHCO3, 3. Ca/MgHCO3, 4. Ca/MgNaHCO3, 4a. MgNa/CaHCO3/Cl, 5. NaMg/CaHCO3/Cl, 6. NaHCO3, 7. Na/MgHCO3SO4, 8. NaSO4Cl/HCO3. Hydrogeologic descriptions, consisting of groundwater origin, flow path and possible active water-rock processes, have been realised for the observed water types. The first two water types occur in serpentine and ultramafic-gabbro springs. Type 3 waters represent early stages of recharge and/or short flow paths, in gabbro whereas types 4 and 5 are typical for further percolating waters in gabbro and diabase. Water types 6 and 7 occur both in diabase and in the basal group and represent the regional flow. Water type 8 is the end member of regional, upwelling groundwater in the basal group. The presented descriptions and methods have practical applications in groundwater exploration, characterization, and protection. The methodology can be applied in other complex aquifer systems.
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Publisher Place of Publication Editor
Language english Summary Language english Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0883-2927 ISBN Medium
Area Cyprus Expedition Conference
Notes Approved no
Call Number THL @ christoph.kuells @ Christofi2020104780 Serial 76
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Author Krüger, N.; Külls, C.; Bruggeman, A.; Eliades, M.; Christophi, C.; Rigas, M.; Eracleous, T.
Title Groundwater recharge estimates with soil isotope profiles-is there a bias on coarse-grained hillslopes? Type Conference Article
Year 2020 Publication EGU General Assembly Conference Abstracts Abbreviated Journal
Volume Issue (down) Pages 9840
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Notes Approved no
Call Number THL @ christoph.kuells @ Krueger2020groundwater Serial 42
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Author Külls, C.H.; Eichinger, F.; Fader, H.J.; Leistert, H.; Lorenz, G.; Szakacs, E.
Title New Environmental Analytical Techniques to Monitor Carbon Sequestration Type Conference Article
Year 2011 Publication 1st EAGE Sustainable Earth Sciences (SES) Conference and Exhibition Abbreviated Journal
Volume Issue (down) Pages 268
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Area Expedition Conference European Association of Geoscientists & Engineers
Notes Approved no
Call Number THL @ christoph.kuells @ Kuells2011new Serial 47
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Author Frey, S.; Külls, C.; Schlosser, C.
Title New Hydrological Age-Dating techniques using cosmogenic radionuclides Beryllium-7 and Sodium-22 Type Conference Article
Year 2011 Publication Proc. IAEA Conf. Monacco Abbreviated Journal
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Notes Approved no
Call Number THL @ christoph.kuells @ Frey2011new Serial 48
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Author Adolph, G.; Römer, T.; Külls, C.
Title Deriving complex groundwater age structure by combining age dating and analytic element modelling Type Conference Article
Year Publication G-DAT 2008-Leipzig Abbreviated Journal
Volume Issue (down) Pages 12
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Notes Approved no
Call Number THL @ christoph.kuells @ Adolph2008deriving Serial 55
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Author Külls, C.; Haering, M.; Leistert, H.; Oster, H.
Title Hydrological, physical and chemical constraints for groundwater age dating with CFC and SF6 Type Conference Article
Year Publication G-DAT 2008-Leipzig Abbreviated Journal
Volume Issue (down) Pages 29
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Notes Approved no
Call Number THL @ christoph.kuells @ Kuells2008hydrological Serial 57
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Author Tröger, U.; Dias, C.L.; Guillaumon, J.R.; Iritani, M.A.; Külls, C.; Schuler, G.
Title Remarks and new data about the recharge of the Guarani Aquifer System Type Conference Article
Year 2004 Publication XXXIII IAH Congress, Abstracts, IAH, Mexico Abbreviated Journal
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Call Number THL @ christoph.kuells @ Troeger2004remarks Serial 59
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Author Udluft, P.; Külls, C.
Title Mapping the availability and dynamics of groundwater recharge. Part 1: modelling techniques Type Conference Article
Year 2000 Publication Proceedings of the Third Congress on Regional Geological Cartography and Information Systems Abbreviated Journal
Volume Issue (down) Pages 337-340
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Notes Approved no
Call Number THL @ christoph.kuells @ Udluft2000mapping Serial 64
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Author Külls, C.; Jobin, J.; Weiler, M.
Title Environmental analytics for water carbon management: enable WCM: Schlussbericht Type Report
Year 2015 Publication Abbreviated Journal
Volume Issue (down) Pages
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Publisher Albert Ludwigs Universität, Professur für Hydrologie Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Kuells2015environmental Serial 65
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Author Udluft, P.; Dünkeloh, A.; Mederer, J.; Külls, C.; Schaller, J.
Title Re-evaluation of the groundwater resources of Cyprus Type Report
Year 2006 Publication Abbreviated Journal
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Publisher Lefkosia Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Udluft2006re Serial 66
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