Review on soil water isotope‐based groundwater recharge estimations P Koeniger, M Gaj, M Beyer, T Himmelsbach
Hydrological Processes 30 (16), 2817-2834, 2016
113 2016 In situ unsaturated zone water stable isotope ( H and O) measurements in semi-arid environments: a soil water balance M Gaj, M Beyer, P Koeniger, H Wanke, J Hamutoko, T Himmelsbach
Hydrology and Earth System Sciences 20 (2), 715-731, 2016
103 2016 A deuterium-based labeling technique for the investigation of rooting depths, water uptake dynamics and unsaturated zone water transport in semiarid environments M Beyer, P Koeniger, M Gaj, JT Hamutoko, H Wanke, T Himmelsbach
Journal of Hydrology 533, 627-643, 2016
102 2016 Examination of deep root water uptake using anomalies of soil water stable isotopes, depth-controlled isotopic labeling and mixing models M Beyer, JT Hamutoko, H Wanke, M Gaj, P Koeniger
Journal of Hydrology 566, 122-136, 2018
80 2018 Mineral mediated isotope fractionation of soil water M Gaj, S Kaufhold, P Koeniger, M Beyer, M Weiler, T Himmelsbach
Rapid Communications in Mass Spectrometry 31 (3), 269-280, 2017
79 2017 Potential limitation of cryogenic vacuum extractions and spiked experiments M Gaj, S Kaufhold, JJ McDonnell
Rapid Communications in Mass Spectrometry 31 (9), 821-823, 2017
35 2017 Possible soil tension controls on the isotopic equilibrium fractionation factor for evaporation from soil M Gaj, JJ McDonnell
Hydrological Processes 33 (11), 1629-1634, 2019
30 2019 Estimation of groundwater recharge via deuterium labelling in the semi-arid Cuvelai-Etosha Basin, Namibia M Beyer, M Gaj, JT Hamutoko, P Koeniger, H Wanke, T Himmelsbach
Isotopes in environmental and health studies 51 (4), 533-552, 2015
26 2015 Hydrogeochemical and isotope study of perched aquifers in the Cuvelai-Etosha Basin, Namibia JT Hamutoko, H Wanke, P Koeniger, M Beyer, M Gaj
Isotopes in Environmental and Health Studies 53 (4), 382-399, 2017
24 2017 The role of matric potential, solid interfacial chemistry, and wettability on isotopic equilibrium fractionation M Gaj, A Lamparter, SK Woche, J Bachmann, JJ McDonnell, CF Stange
Vadose Zone Journal 18 (1), 1-11, 2019
22 2019 In-situ unsaturated zone stable water isotope (2H and 18O) measurements in semi-arid environments using tunable off-axis integrated cavity output spectroscopy M Gaj, M Beyer, P Koeniger, H Wanke, J Hamutoko, T Himmelsbach
Hydrol. Earth Syst. Sci. Discuss 12, 6115-6149, 2015
22 2015 17 O‐excess as a detector for co‐extracted organics in vapor analyses of plant isotope signaturesMF Nehemy, C Millar, K Janzen, M Gaj, DL Pratt, CP Laroque, ...
Rapid Communications in Mass Spectrometry 33 (16), 1301-1310, 2019
19 2019 Stable isotope signatures of meteoric water in the Cuvelai-Etosha Basin, Namibia: Seasonal characteristics, trends and relations to southern African patterns H Wanke, M Gaj, M Beyer, P Koeniger, JT Hamutoko
Isotopes in environmental and health studies 54 (6), 588-607, 2018
15 2018 Mineral mediated isotope fractionation of soil water, Rapid Commun. Mass Sp., 31, 269–280 M Gaj, S Kaufhold, P Koeniger, M Beyer, M Weiler, T Himmelsbach
7 2017 Evaporation loss along the Calueque-Oshakati Canal in the Cuvelai-Etosha Basin (Northern Namibia): evidence from stable isotopes and hydrochemistry P Koeniger, J Hamutoko, VEA Post, M Beyer, M Gaj, T Himmelsbach, ...
Isotopes in environmental and health studies 57 (1), 53-66, 2021
6 2021 Spatio-temporal variations of hydrochemical and isotopic patterns of groundwater in hand-dug wells: the Cuvelai-Etosha Basin, Namibia JT Hamutoko, H Wanke, M Beyer, M Gaj, P Koeniger
Proceedings of the International Association of Hydrological Sciences 378, 29-35, 2018
5 2018 Isotopenhydrologische Methoden (2 H, 18 O) zur Bestimmung der Grundwasserneubildung in Trockengebieten: Potenzial und Grenzen M Beyer, M Gaj, P Königer, JT Hamutoko, H Wanke, M Wallner, ...
Grundwasser 23 (1), 73-90, 2018
3 2018 The impact of soil tension on isotope fractionation, transport, and interpretations of the root water uptake origin T Zhou, J Šimůnek, P Nasta, G Brunetti, M Gaj, C Neukum, V Post
Water Resources Research 59 (9), e2022WR034023, 2023
1 2023 How do soil types affect stable isotope ratios of 2H and 18O under evaporation: A Fingerprint of the Niipele subbasin of the Cuvelai-Etosha basin, Namibia. M Gaj, M Beyer, J Hamutoko, S Uugulu, H Wanke, P Koeniger, C Kuells, ...
EGU General Assembly Conference Abstracts, 5890, 2014
1 2014 Determining the soil water balance at a large-scale lysimetric facility with 60 years of uninterrupted data comprising a grassland basin, oak/beech and a pine basin M Gaj, S Costabel, M Erlach, J Frank, V Tarasyuk, S Peth, V Schimetzek
EGU24, 2024
2024