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Author Adar, E.M.; Külls, C. openurl 
  Title MCM sf–Mixing-cell model for a steady flow MIG–Mixing-cell input generator: A short manual for installation and operation of MCM sf using the MIG–mixing-cell input generator Type Report
  Year 2002 Publication Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ adar2002mcm Serial 67  
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Author Külls, C. doi  openurl
  Title Ecohydrological principles in economic models of water resources in drylands and desert restoration Type Miscellaneous
  Year 2014 Publication UNCCD, 2nd Scient. Conf. Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ Kuells2014ecohydrological Serial 68  
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Author Külls, C.; Bittner, A. openurl 
  Title Passive barriers for long-term containment of Uranium and Vanadium Type Miscellaneous
  Year 2013 Publication IMWA Conf. Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ Kuells12013passive Serial 69  
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Author Külls, C.; Bittner, A.; Marx, V. openurl 
  Title Strategic Assessment of Water Resources for the Erongo Uranium Province Type Miscellaneous
  Year 2013 Publication IMWA Conf. Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ Kuells2012strategic Serial 70  
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Author Külls, C. openurl 
  Title Rekonstruktion hydrologischer Extreme in der Namibwüste Type Journal Article
  Year 2011 Publication Berichte der naturforschenden Gesellschaft zu Freiburg im Breisgau Abbreviated Journal  
  Volume Issue 101 Pages 69-81  
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  Call Number THL @ christoph.kuells @ Serial 71  
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Author Külls, C.; Schwarz, O. openurl 
  Title Grundwasseranreicherung in den Waldbeständen der Teninger Allmend bei Freiburg im Breisgau Type Book Chapter
  Year 2000 Publication Beiträge zur Physischen Geographie Abbreviated Journal  
  Volume Issue Pages 67 - 78  
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  Corporate Author Fachbereich Geowissenschaften der Johann Wolfgang Goethe-Universität Frankfurt am Main Thesis  
  Publisher Werner-F. Bär Place of Publication Frankfurt am Main Editor  
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  Call Number THL @ christoph.kuells @ Serial 72  
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Author Rehm-Berbenni, C.; Druta A.; Åberg, G.; Neguer J.; Külls, C.; Patrizi, G.; Pacha, T.; Kienzle, P.; Bugini, R.; Fiore, M.G. openurl 
  Title Isotope Technologies Applied to the Analysis of Ancient Roman Mortars Type Book Whole
  Year 2005 Publication European Commission Abbreviated Journal  
  Volume Issue Pages  
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  Abstract Results of the CRAFT Project EVK4 CT-2001-30004  
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  Call Number THL @ christoph.kuells @ Serial 73  
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Author Gunkel, A. Külls, C. openurl 
  Title Towards agent-based modelling of stakeholder behaviour – a pilot study on drought vulnerability of decentral water supply in NE Brazil Type Journal Article
  Year 2006 Publication International Congress on Environmental Modelling and Sofware Abbreviated Journal  
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  Abstract 3rd International Congress on Environmental Modelling and Sofware – Burlington, Vermont  
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  Notes Approved (up) no  
  Call Number THL @ christoph.kuells @ Serial 74  
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Author Külls, C. openurl 
  Title Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen Type Report
  Year 2004 Publication Umweltbundesamt Abbreviated Journal  
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  Abstract Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen  
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  Notes Approved (up) no  
  Call Number THL @ christoph.kuells @ Serial 75  
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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 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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  Call Number THL @ christoph.kuells @ Christofi2020104780 Serial 76  
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