Publications

@article{Christofi2020hydrochemical,

title = {Hydrochemical evolution of groundwater in gabbro of the Troodos Fractured Aquifer. A comprehensive approach},

author = {C. Christofi and A. Bruggeman and C. K\"{u}lls and C. Constantinou},

doi = {https://doi.org/10.1016/j.apgeochem.2020.104524},

year  = {2020},

date = {2020-01-01},

journal = {Applied Geochemistry},

volume = {114},

pages = {104524},

publisher = {Pergamon},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Christofi2020104780,

title = {Isotope hydrology and hydrogeochemical modeling of Troodos Fractured Aquifer, Cyprus: The development of hydrogeological descriptions of observed water types},

author = {C. Christofi and A. Bruggeman and C. K\"{u}lls and C. Constantinou},

issn = {0883-2927},

year  = {2020},

date = {2020-01-01},

journal = {Applied Geochemistry},

volume = {123},

pages = {104780},

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 1.22texttenthousand for δ2H and 0.20texttenthousand 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.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mahindawansha2020investigating,

title = {Investigating unproductive water losses from irrigated agricultural crops in the humid tropics through analyses of stable isotopes of water},

author = {A. Mahindawansha and C. K\"{u}lls and P. Kraft and L. Breuer},

doi = {https://doi.org/10.5194/hess-24-3627-2020},

year  = {2020},

date = {2020-01-01},

journal = {Hydrology and Earth System Sciences},

volume = {24},

number = {7},

pages = {3627\textendash3642},

publisher = {Copernicus GmbH},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Joseph2019application,

title = {Application of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soils},

author = {J. Joseph and C. K\"{u}lls and M. Arend and M. Schaub and F. Hagedorn and A. Gessler and M. Weiler},

doi = {https://doi.org/10.5194/soil-5-49-2019},

year  = {2019},

date = {2019-01-01},

journal = {Soil},

volume = {5},

number = {1},

pages = {49\textendash62},

publisher = {Copernicus},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Hamutoko2014fingerprinting,

title = {A fingerprinting method for the identification of uranium sources in alluvial aquifers: An example from the Khan and Swakop Rivers, Namibia},

author = {J. Hamutoko and B. Mapani and R. Ellmies and A. Bittner and C. K\"{u}lls},

year  = {2014},

date = {2014-01-01},

journal = {Physics and Chemistry of the Earth, Parts A/B/C},

volume = {72},

pages = {34\textendash42},

publisher = {Pergamon},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mueller2014tracking,

title = {Tracking water pathways in steep hillslopes by δ18O depth profiles of soil water},

author = {M. M\"{u}ller and A. Alaoui and C. K\"{u}lls and H. Leistert and K. Meusburger and C. Stumpp and M. Weiler and C. Alewell},

doi = {https://doi.org/10.1016/j.jhydrol.2014.07.031},

year  = {2014},

date = {2014-01-01},

journal = {Journal of hydrology},

volume = {519},

pages = {340\textendash352},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Baram2013desiccation,

title = {Desiccation-crack-induced salinization in deep clay sediment},

author = {S. Baram and Z. Ronen and D. Kurtzman and C. K\"{u}lls and O. Dahan},

doi = {https://doi.org/10.5194/hess-17-1533-2013},

year  = {2013},

date = {2013-01-01},

journal = {Hydrology and Earth System Sciences},

volume = {17},

number = {4},

pages = {1533},

publisher = {Copernicus GmbH},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Davila2013toolkit,

title = {A toolkit for groundwater mean residence time interpretation with gaseous tracers},

author = {P. D\'{a}vila and C. K\"{u}lls and M. Weiler},

year  = {2013},

date = {2013-01-01},

journal = {Computers \& Geosciences},

volume = {61},

pages = {116\textendash125},

publisher = {Pergamon},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Klaus2013macropore,

title = {Macropore flow of old water revisited: experimental insights from a tile-drained hillslope},

author = {J. Klaus and E. Zehe and M. Elsner and C. K\"{u}lls and J. J. McDonnell},

doi = {https://doi.org/10.5194/hess-17-103-2013},

year  = {2013},

date = {2013-01-01},

journal = {Hydrology and Earth System Sciences},

volume = {17},

number = {1},

pages = {103},

publisher = {Copernicus GmbH},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Garvelmann2012porewater,

title = {A porewater-based stable isotope approach for the investigation of subsurface hydrological processes},

author = {J. Garvelmann and C. K\"{u}lls and M. Weiler},

doi = {https://doi.org/10.5194/hess-16-631-2012},

year  = {2012},

date = {2012-01-01},

journal = {Hydrology \& Earth System Sciences},

volume = {16},

number = {2},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Benito2010management,

title = {Management of alluvial aquifers in two southern African ephemeral rivers: implications for IWRM},

author = {G. Benito and R. Rohde and M. Seely and C. K\"{u}lls and O. Dahan and Y. Enzel and S. Todd and B. Botero and E. Morin and T. Grodek},

doi = {https://doi.org/10.1007/s11269-009-9463-9},

year  = {2010},

date = {2010-01-01},

journal = {Water Resources Management},

volume = {24},

number = {4},

pages = {641\textendash667},

publisher = {Springer Netherlands},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Morin2009flood,

title = {Flood routing and alluvial aquifer recharge along the ephemeral arid Kuiseb River, Namibia},

author = {E. Morin and T. Grodek and O. Dahan and G. Benito and C. K\"{u}lls and Y. Jacoby and G. Van Langenhove and M. Seely and Y. Enzel},

doi = {https://doi.org/10.1016/j.jhydrol.2009.02.015},

year  = {2009},

date = {2009-01-01},

journal = {Journal of Hydrology},

volume = {368},

number = {1-4},

pages = {262\textendash275},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Dahan2008dynamics,

title = {Dynamics of flood water infiltration and ground water recharge in hyperarid desert},

author = {O. Dahan and B. Tatarsky and Y. Enzel and C. K\"{u}lls and M. Seely and G. Benito},

doi = {https://doi.org/10.1111/j.1745-6584.2007.00414.x},

year  = {2008},

date = {2008-01-01},

journal = {Groundwater},

volume = {46},

number = {3},

pages = {450\textendash461},

publisher = {Blackwell Publishing Inc Malden, USA},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Klaus2008evaluating,

title = {Evaluating the recharge mechanism of the Lower Kuiseb Dune area using mixing cell modeling and residence time data},

author = {J. Klaus and C. K\"{u}lls and O. Dahan},

doi = {https://doi.org/10.1016/j.jhydrol.2008.06.012},

year  = {2008},

date = {2008-01-01},

journal = {Journal of Hydrology},

volume = {358},

number = {3-4},

pages = {304\textendash316},

publisher = {Elsevier},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Zagana2007chloride,

title = {Chloride, hydrochemical and isotope methods of groundwater recharge estimation in eastern Mediterranean areas: a case study in Jordan},

author = {E. Zagana and M. Obeidat and C. K\"{u}lls and P. Udluft},

doi = {https://doi.org/10.1002/hyp.6390},

year  = {2007},

date = {2007-01-01},

journal = {Hydrological Processes: An International Journal},

volume = {21},

number = {16},

pages = {2112\textendash2123},

publisher = {John Wiley \& Sons, Ltd. Chichester, UK},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Klock2001,

title = {Quantification of Groundwater Recharge-Estimating recharge values using hydrochemical and geological data: A case study from the semiarid Kalahari catchment of northern Namibia},

author = {H. Klock and C. K\"{u}lls and P. Udluft},

year  = {2001},

date = {2001-01-01},

journal = {IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences},

volume = {269},

pages = {25\textendash32},

publisher = {Wallingford [Oxfordshire]: IAHS, 1981-},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Klock2000estimation,

title = {Estimation of relative recharge values for the northern Kalahari catchment, Namibia},

author = {H. Klock and C. K\"{u}lls and P. Udluft},

year  = {2000},

date = {2000-01-01},

journal = {Journal of African Earth Sciences},

volume = {30},

number = {4},

pages = {47\textendash48},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kuells1995channel,

title = {Channel infiltration study using dye tracers},

author = {C. K\"{u}lls and C. Leibundgut and U. Schwarz and A. P. Schick},

year  = {1995},

date = {1995-01-01},

journal = {IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences},

volume = {232},

pages = {429\textendash436},

publisher = {Wallingford [Oxfordshire]: IAHS, 1981-},

keywords = {},

pubstate = {published},

tppubtype = {article}

}