| Records |
| Author |
Klaus, J.; Külls, C. |
| Title |
Integrating residence time data in mixing cell modeling-Application to the Lower Kuiseb Dune area |
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Conference Article |
| Year |
2009 |
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EGU Geophysical Abstracts |
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11026 |
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THL @ christoph.kuells @ Klaus2009integrating |
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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 |
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2000 |
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Tropentag Hoffenheim |
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THL @ christoph.kuells @ Kuells2000assessing |
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63 |
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| Author |
Külls, C. |
| Title |
Ecohydrological principles in economic models of water resources in drylands and desert restoration |
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Miscellaneous |
| Year |
2014 |
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UNCCD, 2nd Scient. Conf. |
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THL @ christoph.kuells @ Kuells2014ecohydrological |
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68 |
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| Author |
Külls, C.; Bittner, A. |
| Title |
Passive barriers for long-term containment of Uranium and Vanadium |
Type |
Miscellaneous |
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2013 |
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IMWA Conf. |
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THL @ christoph.kuells @ Kuells12013passive |
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69 |
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Külls, C.; Bittner, A.; Marx, V. |
| Title |
Strategic Assessment of Water Resources for the Erongo Uranium Province |
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Miscellaneous |
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2013 |
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IMWA Conf. |
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THL @ christoph.kuells @ Kuells2012strategic |
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70 |
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| Author |
Külls, C.; Schwarz, O. |
| Title |
Grundwasseranreicherung in den Waldbeständen der Teninger Allmend bei Freiburg im Breisgau |
Type |
Book Chapter |
| Year |
2000 |
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Beiträge zur Physischen Geographie |
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67 - 78 |
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Fachbereich Geowissenschaften der Johann Wolfgang Goethe-Universität Frankfurt am Main |
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Werner-F. Bär |
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Frankfurt am Main |
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THL @ christoph.kuells @ |
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72 |
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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 |
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Book Whole |
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2005 |
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European Commission |
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Results of the CRAFT Project EVK4 CT-2001-30004 |
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THL @ christoph.kuells @ |
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73 |
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Gunkel, A. Külls, C. |
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Towards agent-based modelling of stakeholder behaviour – a pilot study on drought vulnerability of decentral water supply in NE Brazil |
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Journal Article |
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2006 |
Publication |
International Congress on Environmental Modelling and Sofware |
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3rd International Congress on Environmental Modelling and Sofware – Burlington, Vermont |
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no |
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THL @ christoph.kuells @ |
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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 |
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2004 |
Publication |
Umweltbundesamt |
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Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen |
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THL @ christoph.kuells @ |
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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 |
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| Volume |
123 |
Issue |
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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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english |
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english |
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0883-2927 |
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Cyprus |
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Approved |
no |
| Call Number |
THL @ christoph.kuells @ Christofi2020104780 |
Serial |
76 |
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