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Author Külls, C.; Nunes, A.; Köbel-Batista, M.; Branquinho, C.; Bianconi, N.; Costantini, E. openurl 
  Title Integrated use of soil physical and water isotope methods for ecohydrological characterization of desertified areas Type Conference Article
  Year 2014 Publication (up) EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages 15430  
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  Call Number THL @ christoph.kuells @ Kuells2014integrated Serial 46  
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Author Davila, P.; Külls, C. openurl 
  Title Reliability of current CFC data for age dating of water Type Conference Article
  Year 2010 Publication (up) EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages 536  
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  Call Number THL @ christoph.kuells @ Davila2010reliability Serial 49  
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Author Davila, P.; Külls, C. openurl 
  Title Combined application of 85-Kr, 39-Ar with CFCs in contaminated aquifers Type Journal Article
  Year 2009 Publication (up) EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages 1074  
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  Call Number THL @ christoph.kuells @ Davila2009combined Serial 51  
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Author Külls, C.; Marx, V.; Bittner, A.; Ellmies, R.; Seely, M. openurl 
  Title Environmental impacts on the hydrology of ephemeral streams and alluvial aquifers Type Conference Article
  Year 2009 Publication (up) EGU Geophysical Abstracts Abbreviated Journal  
  Volume Issue Pages 5517  
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  Call Number THL @ christoph.kuells @ Kuells2009environmental Serial 53  
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Author Klaus, J.; Külls, C. openurl 
  Title Integrating residence time data in mixing cell modeling-Application to the Lower Kuiseb Dune area Type Conference Article
  Year 2009 Publication (up) 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 Ola, I.; Drebenstedt, C.; Burgess, R.M.; Mensah, M.; Hoth, N.; Okoroafor, P.; Külls, C. url  doi
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  Title Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment Type Journal Article
  Year 2024 Publication (up) Environmental Monitoring and Assessment Abbreviated Journal  
  Volume 196 Issue 6 Pages 585  
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  Abstract The Niger Delta in Nigeria is a complex and heavily contaminated area with over 150,000 interconnected contaminated sites. This intricate issue is compounded by the region’s strong hydrological processes and high-energy environment, necessitating a science-based approach for effective contamination assessment and management. This study introduces the concept of sub-catchment contamination assessment and management, providing an overarching perspective rather than addressing each site individually. A description of the sub-catchment delineation process using the digital elevation model data from an impacted area within the Delta is provided. Additionally, the contamination status from the delineated sub-catchment is reported. Sediment, surface water and groundwater samples from the sub-catchment were analyzed for total petroleum hydrocarbons (TPH) and polycyclic aromatic hydrocarbons (PAHs), respectively. Surface sediment TPH concentrations ranged from 129 to 20,600 mg/kg, with subsurface (2-m depth) concentrations from 15.5 to 729 mg/kg. PAHs in surface and subsurface sediment reached 9.55 mg/kg and 0.46 mg/kg, respectively. Surface water exhibited TPH concentrations from 10 to 620 mg/L, while PAHs ranged from below detection limits to 1 mg/L. Groundwater TPH concentrations spanned 3 to 473 mg/L, with total PAHs varying from below detection limits to 0.28 mg/L. These elevated TPH and PAH levels indicate extensive petroleum contamination in the investigated sediment and water environment. Along with severe impacts on large areas of mangroves and wetlands, comparison of TPH and PAH concentrations with sediment and water quality criteria found 54 to 100% of stations demonstrated exceedances, suggesting adverse biological effects on aquatic and sediment biota are likely occurring.  
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  Call Number THL @ christoph.kuells @ Ola2024 Serial 290  
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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 (up) Environmental Water Engineering Abbreviated Journal  
  Volume 1 Issue 1 Pages 1-21  
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  Call Number THL @ christoph.kuells @ Androvitsanea2018hydrologische Serial 17  
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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 (up) 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 Adolph, G.; Römer, T.; Külls, C. openurl 
  Title Deriving complex groundwater age structure by combining age dating and analytic element modelling Type Conference Article
  Year Publication (up) G-DAT 2008-Leipzig Abbreviated Journal  
  Volume Issue Pages 12  
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  Call Number THL @ christoph.kuells @ Adolph2008deriving Serial 55  
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Author Külls, C.; Haering, M.; Leistert, H.; Oster, H. openurl 
  Title Hydrological, physical and chemical constraints for groundwater age dating with CFC and SF6 Type Conference Article
  Year Publication (up) G-DAT 2008-Leipzig Abbreviated Journal  
  Volume Issue Pages 29  
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  Call Number THL @ christoph.kuells @ Kuells2008hydrological Serial 57  
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