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Author Joseph, J.; Külls, C.; Arend, M.; Schaub, M.; Hagedorn, F.; Gessler, A.; Weiler, M.
Title Application of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soils Type (down) Journal Article
Year 2019 Publication Soil Abbreviated Journal
Volume 5 Issue 1 Pages 49-62
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Corporate Author Thesis
Publisher Copernicus Place of Publication Editor
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Notes Approved no
Call Number THL @ christoph.kuells @ Joseph2019application Serial 15
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Author Davila, P.; Külls, C.
Title Combined application of 85-Kr, 39-Ar with CFCs in contaminated aquifers Type (down) Journal Article
Year 2009 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 1074
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Notes Approved no
Call Number THL @ christoph.kuells @ Davila2009combined Serial 51
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Author Külls, C.
Title Rekonstruktion hydrologischer Extreme in der Namibwüste Type (down) 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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Notes Approved no
Call Number THL @ christoph.kuells @ Serial 71
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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 (down) Journal Article
Year 2006 Publication International Congress on Environmental Modelling and Sofware Abbreviated Journal
Volume Issue Pages
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Abstract 3rd International Congress on Environmental Modelling and Sofware – Burlington, Vermont
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Notes Approved no
Call Number THL @ christoph.kuells @ Serial 74
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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 (down) 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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Publisher Place of Publication Editor
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 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 (down) Conference Article
Year 2020 Publication EGU General Assembly Conference Abstracts Abbreviated Journal
Volume Issue Pages 9840
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Call Number THL @ christoph.kuells @ Krueger2020groundwater Serial 42
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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 (down) Conference Article
Year 2020 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 4073
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Call Number THL @ christoph.kuells @ Doulgeris2020prediction Serial 41
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Author Gaj, M.; Beyer, M.; Hamutoko, J.; Uugulu, S.; Wanke, H.; Koeniger, P.; Külls, C.; Lohe, C.; Himmelsbach, T.
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 (down) Conference Article
Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 5890
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Notes Approved no
Call Number THL @ christoph.kuells @ Gaj2014soil Serial 44
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Author Joseph, J.; Külls, C.
Title Calibration of 13C and 18O measurements in CO2 using Off-axis Integrated Cavity Output Spectrometer (ICOS) Type (down) Conference Article
Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 659
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Call Number THL @ christoph.kuells @ Joseph2014calibration Serial 45
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Author Külls, C.; Nunes, A.; Köbel-Batista, M.; Branquinho, C.; Bianconi, N.; Costantini, E.
Title Integrated use of soil physical and water isotope methods for ecohydrological characterization of desertified areas Type (down) Conference Article
Year 2014 Publication EGU Geophysical Abstracts Abbreviated Journal
Volume Issue Pages 15430
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Notes Approved no
Call Number THL @ christoph.kuells @ Kuells2014integrated Serial 46
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