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Author Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. url  openurl
  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 (down) 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  
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  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 Christofi, C.; Bruggeman, A.; Külls, C.; Constantinou, C. url  doi
openurl 
  Title Hydrochemical evolution of groundwater in gabbro of the Troodos Fractured Aquifer. A comprehensive approach Type Journal Article
  Year 2020 Publication Applied Geochemistry Abbreviated Journal  
  Volume 114 Issue Pages (down) 104524  
  Keywords geochemistry  
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  Corporate Author Thesis  
  Publisher Pergamon Place of Publication Editor  
  Language English Summary Language Original Title  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number THL @ christoph.kuells @ Christofi2020hydrochemical Serial 13  
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Author Jin, Z.; Külls, C. doi  openurl
  Title FDM based OA-ICOS for high accuracy 13C quantification in gaseous CO2 Type Journal Article
  Year 2020 Publication Earth and Environmental Science Abbreviated Journal EES  
  Volume 446 Issue 3 Pages (down) 032061  
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  Series Editor Series Title IOP Conference Series Abbreviated Series Title  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Jin2020fdm Serial 16  
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Author Külls, C.; Nunes, A.; Köbel-Batista, M.; Branquinho, C.; Bianconi, N.; Costantini, E. openurl 
  Title Integrated use of soil physical and water isotope methods for ecohydrological characterization of desertified areas Type Conference Article
  Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages (down) 15430  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Kuells2014integrated Serial 46  
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Author Klaus, J.; Külls, C. openurl 
  Title Integrating residence time data in mixing cell modeling-Application to the Lower Kuiseb Dune area Type Conference Article
  Year 2009 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages (down) 11026  
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  Call Number THL @ christoph.kuells @ Klaus2009integrating Serial 54  
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Author Krüger, N.; Külls, C.; Bruggeman, A.; Eliades, M.; Christophi, C.; Rigas, M.; Eracleous, T. openurl 
  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 Pages (down) 9840  
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  Call Number THL @ christoph.kuells @ Krueger2020groundwater Serial 42  
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Author Gaj, M.; Beyer, M.; Hamutoko, J.; Uugulu, S.; Wanke, H.; Koeniger, P.; Külls, C.; Lohe, C.; Himmelsbach, T. openurl 
  Title How do soil types affect stable isotope ratios of 2H and 18O under evaporation: A Fingerprint of the Niipele subbasin of the Cuvelai-Etosha basin, Namibia Type Conference Article
  Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages (down) 5890  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Gaj2014soil Serial 44  
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Author Külls, C.; Marx, V.; Bittner, A.; Ellmies, R.; Seely, M. openurl 
  Title Environmental impacts on the hydrology of ephemeral streams and alluvial aquifers Type Conference Article
  Year 2009 Publication EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages (down) 5517  
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  Notes Approved no  
  Call Number THL @ christoph.kuells @ Kuells2009environmental Serial 53  
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Author Doulgeris, C.; Tziritis, E.; Pisinaras, V.; Panagopoulos, A.; Külls, C. openurl 
  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 (down) 4073  
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  Call Number THL @ christoph.kuells @ Doulgeris2020prediction Serial 41  
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Author Mahindawansha, A.; Külls, C.; Kraft, P.; Breuer, L. url  doi
openurl 
  Title Investigating unproductive water losses from irrigated agricultural crops in the humid tropics through analyses of stable isotopes of water Type Journal Article
  Year 2020 Publication Hydrology and Earth System Sciences Abbreviated Journal  
  Volume 24 Issue 7 Pages (down) 3627-3642  
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  Publisher Copernicus GmbH Place of Publication Editor  
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  Notes Approved yes  
  Call Number THL @ christoph.kuells @ Mahindawansha2020investigating Serial 14  
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