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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 (up) Pages  
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  Abstract Results of the CRAFT Project EVK4 CT-2001-30004  
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  Notes Approved no  
  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  
  Volume Issue (up) 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 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  
  Volume Issue (up) Pages  
  Keywords  
  Abstract Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen  
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  Notes Approved 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 (up) 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  
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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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Author Emparanza, A.R.; Kampmann, R.; Caso, F.D.; Morales, C.; Nanni, A. url  openurl
  Title Durability assessment of GFRP rebars in marine environments Type Journal Article
  Year 2022 Publication Construction and Building Materials Abbreviated Journal  
  Volume 329 Issue (up) Pages 127028  
  Keywords Composite FRP rebar, Durability, Service life, Marine structures, Reinforced concrete  
  Abstract Technologies developed over the last two decades have facilitated the use of glass fiber reinforced polymer (GFRP) bars as internal reinforcement for concrete structures, specially in coastal environments, mainly due to their corrosion resistance. To-date, most durability studies have focused on a single mechanical parameter (tensile strength) and a single aging environment (exposure to high alkalinity). However, knowledge gaps exists in understanding how other mechanical parameters and relevant conditioning environments may affect the durability of GFRP bars. To this end, this study assesses the durability for different physio-mechanical properties of GFRP rebars, post exposure to accelerated conditioning in seawater. Six different GFRP rebar types were submerged in seawater tanks, at various temperatures (23°C, 40°C and 60°C) for different time periods (60, 120, 210 and 365 days). In total six different physio-mechanical properties were assessed, including: tensile strength, E-modulus, transverse and horizontal shear strength, micro-structural composition and lastly, bond strength. It was inferred that rebars with high moisture absorption resulted in poor durability, in that it affected mainly the tensile strength. Based on the Arrhenius model, at 23°C all the rebars that met the acceptance criteria by ASTM D7957 are expected to retain 85% of the tensile strength capacity.  
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  ISSN 0950-0618 ISBN Medium  
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  Call Number THL @ christoph.kuells @ Ruizemparanza2022127028 Serial 83  
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Author Adolph, G.; KÜlls, C.; Willscheid, A. openurl 
  Title Determination and validation of age structures as an improved measure of hydrological dynamics Type Conference Article
  Year 2007 Publication Geophysical Research Abstracts Abbreviated Journal  
  Volume 9 Issue (up) 08013 Pages  
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  Call Number THL @ christoph.kuells @ Adolph2007determination Serial 58  
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Author Klaus, J.; Zehe, E.; Elsner, M.; Külls, C.; McDonnell, J.J. url  doi
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  Title Macropore flow of old water revisited: experimental insights from a tile-drained hillslope Type Journal Article
  Year 2013 Publication Hydrology and Earth System Sciences Abbreviated Journal  
  Volume 17 Issue (up) 1 Pages 103  
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  Publisher Copernicus GmbH Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Klaus2013macropore Serial 23  
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Author Androvitsanea, A.; Fawzy, M.; Fuchs, J.; Külls, C.; Fahlbusch, H.; Heiden, J. openurl 
  Title Hydrologische Bedingungen im Heraion von Samos vom 12. bis 8. Jh. v. Chr. und ihre Bedeutung für die wasserbauliche Infrastruktur Type Journal Article
  Year 2018 Publication Environmental Water Engineering Abbreviated Journal  
  Volume 1 Issue (up) 1 Pages 1-21  
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  Call Number THL @ christoph.kuells @ Androvitsanea2018hydrologische Serial 17  
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Author Ardelt, G.; Külls, C.; Hellbrück, H. url  openurl
  Title Towards intrinsic molecular communication using isotopic isomerism Type Journal Article
  Year 2018 Publication Open Journal of Internet Of Things (OJIOT) Abbreviated Journal  
  Volume 4 Issue (up) 1 Pages 135-143  
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  Publisher RonPub Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Ardelt2018towards Serial 18  
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Author Joseph, J.; Külls, C.; Arend, M.; Schaub, M.; Hagedorn, F.; Gessler, A.; Weiler, M. doi  openurl
  Title Application of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soils Type Journal Article
  Year 2019 Publication Soil Abbreviated Journal  
  Volume 5 Issue (up) 1 Pages 49-62  
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  Publisher Copernicus Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Joseph2019application Serial 15  
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