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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 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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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 (down) Cyprus Expedition Conference
Notes Approved no
Call Number THL @ christoph.kuells @ Christofi2020104780 Serial 76
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Author Doulgeris, C.; Tziritis, E.; Pisinaras, V.; Panagopoulos, A.; Külls, C.
Title Prediction of seawater intrusion to coastal aquifers based on non-dimensional diagrams Type Conference Article
Year 2020 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 4073
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Notes Approved no
Call Number THL @ christoph.kuells @ Doulgeris2020prediction Serial 41
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Author Leibundgut, C.; Maloszewski, P.; Külls, C.
Title Tracers in Hydrology Type Book Whole
Year 2009 Publication Abbreviated Journal
Volume Issue 1. Ed. Pages
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Publisher John Wiley & Sons, Ltd Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Leibundgut2009tracers Serial 37
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Author Külls, C.
Title Groundwater of the North-Western Kalahari, Namibia: estimation of recharge and quantification of the flow system Type Book Whole
Year 2001 Publication Hydrogeologie und Umwelt Abbreviated Journal
Volume Issue Pages
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Corporate Author Thesis Doctoral thesis
Publisher Hydrogeologie und Umwelt Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Kuells2003groundwater Serial 38
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Author Döll, P.; Krol, M.; Fuhr, D.; Gaiser, T.; Herfort, J.; Höynck, S.; Jaeger, A.; Külls, C.; Mendiondo, E.M.; Printz, A.; others
Title Integrated scenarios of regional development in Ceará and Piauí Type Book Chapter
Year 2003 Publication Global Change and Regional Impacts Abbreviated Journal
Volume Issue Pages 19-41
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Publisher Springer, Berlin, Heidelberg Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Doll2003integrated Serial 39
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Author Voerkelius, S.; Külls, C.; Santiago, M.M.F.; Frischkorn, H.; dos Santos Semrau, L.A.; Heinrichs, G.; Gil, M.M.L.
Title Investigations on water management and water quality in Picos/PI and Tauá/CE Type Book Chapter
Year 2003 Publication Global change and regional impacts Abbreviated Journal
Volume Issue Pages 173-184
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Publisher Springer, Berlin, Heidelberg Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Voerkelius2003investigations Serial 40
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Author Külls, C.; Leibundgut, C.; Schwarz, U.; Schick, A.P.
Title Channel infiltration study using dye tracers Type Journal Article
Year 1995 Publication IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences Abbreviated Journal
Volume 232 Issue Pages 429-436
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Publisher Wallingford [Oxfordshire]: IAHS, 1981- Place of Publication Editor
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Call Number THL @ christoph.kuells @ Kuells1995channel Serial 36
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Author Demuth, S.; Külls, C.
Title Probability analysis and regional aspects of droughts in southern Germany Type Journal Article
Year 1997 Publication Sustainability of Water Resources under Increasing Uncertainty Abbreviated Journal
Volume Issue 240 Pages 97
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Corporate Author Thesis
Publisher Iahs Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Demuth1997probability Serial 35
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Author Klock, H.; Külls, C.; Udluft, P.
Title Estimation of relative recharge values for the northern Kalahari catchment, Namibia Type Journal Article
Year 2000 Publication Journal of African Earth Sciences Abbreviated Journal
Volume 30 Issue 4 Pages 47-48
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Notes Approved no
Call Number THL @ christoph.kuells @ Klock2000estimation Serial 33
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Author Zagana, E.; Külls, C.; Udluft, P.
Title Der Wasserhaushalt des Aliakmonas Type Journal Article
Year 2000 Publication Vom Wasser Abbreviated Journal
Volume 94 Issue Pages 29-39
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Call Number THL @ christoph.kuells @ Zagana2000saa Serial 34
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