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Author Zagana, E.; Külls, C.; Udluft, P. openurl 
  Title (down) Der Wasserhaushalt des Aliakmonas Type Journal Article
  Year 2000 Publication Vom Wasser Abbreviated Journal  
  Volume 94 Issue Pages 29-39  
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  Call Number THL @ christoph.kuells @ Zagana2000saa Serial 34  
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Author Külls, C. openurl 
  Title (down) Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen Type Report
  Year 2004 Publication Umweltbundesamt Abbreviated Journal  
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  Abstract Demonstration des Potentials der Nitrat-Isotopenanalytik für die Strategieentwicklung der Sanierung Nitrat-belasteter Brunnen  
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  Call Number THL @ christoph.kuells @ Serial 75  
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Author Davila, P.; Külls, C. openurl 
  Title (down) Combined application of 85-Kr, 39-Ar with CFCs in contaminated aquifers Type Journal Article
  Year 2009 Publication 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 Zagana, E.; Obeidat, M.; Külls, C.; Udluft, P. url  doi
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  Title (down) Chloride, hydrochemical and isotope methods of groundwater recharge estimation in eastern Mediterranean areas: a case study in Jordan Type Journal Article
  Year 2007 Publication Hydrological Processes: An International Journal Abbreviated Journal  
  Volume 21 Issue 16 Pages 2112-2123  
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  Publisher John Wiley & Sons, Ltd. Chichester, UK Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Zagana2007chloride Serial 29  
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Author Külls, C.; Leibundgut, C.; Schwarz, U.; Schick, A.P. openurl 
  Title (down) Channel infiltration study using dye tracers Type Journal Article
  Year 1995 Publication IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences Abbreviated Journal  
  Volume 232 Issue Pages 429-436  
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  Publisher Wallingford [Oxfordshire]: IAHS, 1981- Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Kuells1995channel Serial 36  
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Author Joseph, J.; Külls, C. openurl 
  Title (down) Calibration of 13C and 18O measurements in CO2 using Off-axis Integrated Cavity Output Spectrometer (ICOS) Type 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.; Salameh, E.; Udluft, P. openurl 
  Title (down) Assessing water supplies for irrigation-availability of natural resources and sustainability indices Type Conference Article
  Year 2000 Publication Tropentag Hoffenheim Abbreviated Journal  
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  Call Number THL @ christoph.kuells @ Kuells2000assessing Serial 63  
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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 (down) Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment Type Journal Article
  Year 2024 Publication 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 Joseph, J.; Külls, C.; Arend, M.; Schaub, M.; Hagedorn, F.; Gessler, A.; Weiler, M. doi  openurl
  Title (down) 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 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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Author Dávila, P.; Külls, C.; Weiler, M. url  openurl
  Title (down) A toolkit for groundwater mean residence time interpretation with gaseous tracers Type Journal Article
  Year 2013 Publication Computers & Geosciences Abbreviated Journal  
  Volume 61 Issue Pages 116-125  
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  Publisher Pergamon Place of Publication Editor  
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  Call Number THL @ christoph.kuells @ Davila2013toolkit Serial 22  
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