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Author Klaus, J.; Külls, C.
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 11026
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Call Number THL @ christoph.kuells @ Klaus2009integrating Serial 54
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Author Külls, C.; Salameh, E.; Udluft, P.
Title Assessing water supplies for irrigation-availability of natural resources and sustainability indices Type Conference Article
Year 2000 Publication Tropentag Hoffenheim Abbreviated Journal
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Call Number THL @ christoph.kuells @ Kuells2000assessing Serial 63
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Author Külls, C.
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.
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.
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.
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 Rehm-Berbenni, C.; Druta A.; Åberg, G.; Neguer J.; Külls, C.; Patrizi, G.; Pacha, T.; Kienzle, P.; Bugini, R.; Fiore, M.G.
Title Isotope Technologies Applied to the Analysis of Ancient Roman Mortars Type Book Whole
Year 2005 Publication European Commission Abbreviated Journal
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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.
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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Call Number THL @ christoph.kuells @ Serial 74
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Author Külls, C.
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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Call Number THL @ christoph.kuells @ Serial 75
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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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ISSN 0883-2927 ISBN Medium
Area Cyprus Expedition Conference
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Call Number THL @ christoph.kuells @ Christofi2020104780 Serial 76
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