| Records |
| Author |
Davila, P.; Külls, C. |
Title  |
Combined application of 85-Kr, 39-Ar with CFCs in contaminated aquifers |
Type |
Journal Article |
| Year |
2009 |
Publication |
EGU Geophysical Abstracts |
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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. |
| Title |
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 |
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21 |
Issue |
16 |
Pages |
2112-2123 |
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John Wiley & Sons, Ltd. Chichester, UK |
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THL @ christoph.kuells @ Zagana2007chloride |
Serial |
29 |
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| Author |
Külls, C.; Leibundgut, C.; Schwarz, U.; Schick, A.P. |
| Title |
Channel infiltration study using dye tracers |
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Journal Article |
| Year |
1995 |
Publication |
IAHS Publications-Series of Proceedings and Reports-Intern Assoc Hydrological Sciences |
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232 |
Issue |
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Pages |
429-436 |
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Wallingford [Oxfordshire]: IAHS, 1981- |
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THL @ christoph.kuells @ Kuells1995channel |
Serial |
36 |
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| Author |
Joseph, J.; Külls, C. |
| Title |
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 |
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| Volume |
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Issue |
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Pages |
659 |
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THL @ christoph.kuells @ Joseph2014calibration |
Serial |
45 |
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Külls, C.; Salameh, E.; Udluft, P. |
| Title |
Assessing water supplies for irrigation-availability of natural resources and sustainability indices |
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Conference Article |
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2000 |
Publication |
Tropentag Hoffenheim |
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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. |
| Title |
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 |
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| 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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1573-2959 |
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THL @ christoph.kuells @ Ola2024 |
Serial |
290 |
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Joseph, J.; Külls, C.; Arend, M.; Schaub, M.; Hagedorn, F.; Gessler, A.; Weiler, M. |
| Title |
Application of a laser-based spectrometer for continuous in situ measurements of stable isotopes of soil CO2 in calcareous and acidic soils |
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Journal Article |
| Year |
2019 |
Publication |
Soil |
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| Volume |
5 |
Issue |
1 |
Pages |
49-62 |
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Copernicus |
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no |
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THL @ christoph.kuells @ Joseph2019application |
Serial |
15 |
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| Author |
Dávila, P.; Külls, C.; Weiler, M. |
| Title |
A toolkit for groundwater mean residence time interpretation with gaseous tracers |
Type |
Journal Article |
| Year |
2013 |
Publication |
Computers & Geosciences |
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61 |
Issue |
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Pages |
116-125 |
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Pergamon |
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no |
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THL @ christoph.kuells @ Davila2013toolkit |
Serial |
22 |
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| Author |
Garvelmann, J.; Külls, C.; Weiler, M. |
| Title |
A porewater-based stable isotope approach for the investigation of subsurface hydrological processes |
Type |
Journal Article |
| Year |
2012 |
Publication |
Hydrology & Earth System Sciences |
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| Volume |
16 |
Issue |
2 |
Pages |
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THL @ christoph.kuells @ Garvelmann2012porewater |
Serial |
24 |
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Hamutoko, J.; Mapani, B.; Ellmies, R.; Bittner, A.; Külls, C. |
| Title |
A fingerprinting method for the identification of uranium sources in alluvial aquifers: An example from the Khan and Swakop Rivers, Namibia |
Type |
Journal Article |
| Year |
2014 |
Publication |
Physics and Chemistry of the Earth, Parts A/B/C |
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72 |
Issue |
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Pages |
34-42 |
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Pergamon |
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THL @ christoph.kuells @ Hamutoko2014fingerprinting |
Serial |
19 |
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