Dr. rer. nat. Janek Greskowiak

Institute for Biology and Environmental Sciences  (» Postal address)

A3-1-110 (» Adress and map )

+49 441 798-3260  (F&P

Janek Greskowiak

Research scientist

Research interests

My research interests are to understand and model coupled flow and reactive transport processes in groundwater focussing on the following topics:

  •     Surface water - groundwater interaction
  •     Managed aquifer recharge (river bank filtration, soil aquifer treatment, aquifer storage and recovery)
  •     Contaminant reactive transport of organic micro- and macro-pollutants, and radionuclides
  •     Coastal hydrogeology

For the investigation of reactive transport processes I mostly use the simulation tool PHT3D (www.pht3d.org), reactive transport code for saturared porous media which is based on the reaction model PHREEQC-2 and the multi species transport simulator MT3DMS. The PHT3D code is steadily updated and tested with new applications and benchmark examples by the authors Henning Prommer (CSIRO, Perth) and Vincent Post (edinsi groundwater and Flinders University, Adelaide) and a large number of collaborators.

Curriculum vitae

Since 08/2010

Research Scientist at Carl von Ossietzky University Oldenburg, Institute for Biology and Environmental sciences


Visiting Scientist, US Geological Survey, Menlo Park, CA

07/2008 - 07/2010

Post-doctoral research fellow at CSIRO Land and Water, Perth, Australia

01/2006 - 06/2007

Research scientist at Kompetenz Zentrum Wasser Berlin, gGmbH, Berlin

12/2005 - 12/2006

Post-doctoral research fellow at the Center of Geoscience, Universität Göttingen


Dissertation, Alexander von Humboldt University of Berlin


"Reactive transport processes in artificially recharged aquifers - Field and modelling studies"

08/2002 - 01/2003

Visiting scietist at Flinders University, Adelaide and at CSIRO Land and Water, Perth, Australia

2002 – 2005

PhD-student at Leibniz-Institut für Gewässerökologie und Binnenfischerei, Berlin


Graduation/Diplom in Geology, University of Potsdam


60. Sutorius M, Mori C, Greskowiak J, Boettcher L, Bunse C, Dittmar T, Dlugosch L, Hintz NH, Simon M, Striebel M and Pahnke K (2022) Rare earth element behaviour in seawater under the influence of organic matter cycling during a phytoplankton spring bloom – A mesocosm study. Front. Mar. Sci. 9:895723. doi: 10.3389/fmars.2022.895723

59. Biel-Maeso, M, Burke, V., Greskowiak, J., Massmann, G., Lara-Martin, P.A. Corada-Fernandez, C. (2021). Mobility of contaminants of emerging concern in soil column experiments. Science of the Total Environment 762, 144102

58. Greskowiak, J. and Massmann, G. (2021). The impact of morphodynamics and storm floods on pore water flow and transport in the subterranean estuary. Hydrological Processes, e14050, https://doi.org/10.1002/hyp.14050

57. Holt, T., Greskowiak, J., Sültenfuß, J., Massmann, G. (2021). Groundwater age distribution in a highly dynamic coastal aquifer. Advances in Water Resources 149, 103850

56. Moosdorf, N., Böttcher, M.E., Adyasari, D., Erkul, E., Gilfedder, B. S., Greskowiak, J., Jenner, A. K., Kotwicki, L., Massmann, G., Oehler, T., Müller-Pethke, M., Post, V., Prien, R., Scholten, J., Siemon, B., Von Ahn, V. M., Walther, M., Waska, H., Wunderlich, T., Mallast, U. (2021). A state-of-the-art perspective on the characterization of subterranean estuaries at the regional scale. Frontiers in Earth Science 9, 95

55. Seibert, S.L., Böttcher, M.E., Waska, H., Holt, T., Pollmann, T., Greskowiak, J., Massmann, G. (2021). Hydrogeochemistry of near-surface groundwater on a developing barrier island (Spiekeroog, Germany): The role of inundation, season and vegetation. Journal of Hydrology, 126139

54. Waska, H., Simon, H., Ahmerkamp, S., Greskowiak, J., Ahrens, J., Seibert, S.L., Schwalfenberg, K., Zielinski, O. and Dittmar, T. (2021). Molecular Traits of Dissolved Organic Matter in the Subterranean Estuary of a High-Energy Beach: Indications of Sources and Sinks. Front. Mar. Sci., 8:607083, https://doi.org/10.3389/fmars.2021.607083

53. Grünenbaum, N., Ahrens, J., Beck, M., Gilfedder, B.S., Greskowiak, J., Kossack, M., Massmann, G. (2020). A multi-method approach for quantification of in-and exfiltration rates from the subterranean estuary of a high energy beach. Frontiers in Earth Science 8:571310. https://www.frontiersin.org/articles/10.3389/feart.2020.571310/full

52. Grünenbaum, N., Greskowiak, J., Sültenfuß, J., & Massmann, G. (2020). Groundwater flow and residence times below a meso-tidal high-energy beach: A model-based analyses of salinity patterns and 3H-3He groundwater ages. Journal of Hydrology, 587, 124948. https://doi.org/10.1016/j.jhydrol.2020.124948

51. van Gils, J., Posthuma, L., Cousins, I. T., Brack, W., Altenburger, R., Baveco, H., Focks, A., Greskowiak, J., Kühne, R., Kutsarova, S., Lindim, C., Markus, A., van de Meent, D., Munthe, J., Schueder, R., Schüürmann, G., Slobodnik, J., de Zwart, D., & van Wezel, A. (2020). Computational material flow analysis for thousands of chemicals of emerging concern in European waters. Journal of Hazardous Materials, 397, 122655. https://doi.org/10.1016/j.jhazmat.2020.122655

50. Karakurt-Fischer, S, Sanz-Prat, A., Greskowiak, J., Ergh, M., Gerdes, H., Massmann, G., Ederer, J., Regnery, J., Hübner, U. , Drewes, J.E. (2020). Developing a novel biofiltration treatment system by coupling high-rate infiltration trench technology with a plug-flow porous-media bioreactor. Science of the Total Environment 722, 137890

49. Sanz-Prat, A., Greskowiak, J., Burke, V., Rivera Villareyes, C.A., Krause, J., Monninkhoff, B., Sperlich, A., Schimmelpfennig, S., Duennbier, U., Massmann, G. (2020). A model-based analysis of the reactive transport behaviour of 37 trace organic compounds during field-scale bank filtration. Water Research 173,115523

48. Seibert, S.L., Böttcher, M.E., Schubert, F., Pollmann, T., Giani, L., Tsukamoto, S., Frechen, M., Freund, H., Waska, Simon, H.H., Holt, T., Greskowiak, J., Massmann, G. (2019). Iron sulfide formation in young and rapidly-deposited permeable sands at the land-sea transition zone. Science of the Total Environment 649, 264-283

47. Holt, T., Greskowiak, J., Seibert, S., Massmann, G. (2019). Modeling the evolution of a freshwater lens under highly dynamic conditions on a currently developing barrier island. Geofluids, Article ID 9484657, https://www.hindawi.com/journals/geofluids/2019/9484657/

46. Waska H., Greskowiak J., Ahrens J., Beck M., Ahmerkamp S., Böning P., Brumsack H.J., Degenhardt J., Ehlert C., Engelen, B., Grünenbaum N., Holtappels M., Pahnke K., Marchant H.K., Massmann G., Meier D., Schnetger B., Schwalfenberg K., Simon H., Vandieken V., Zielinski O. and Dittmar T. (in press). Spatial and Temporal Patterns of Pore Water Chemistry in the Inter-Tidal Zone of a High Energy Beach. Front. Mar. Sci. 6:154.

45. Seibert, S.L., Böttcher, M.E., Schubert, F., Pollmann, T., Giani, L., Tsukamoto, S., Frechen, M., Freund, H., Waska, Simon, H.H., Holt, T., Greskowiak, J., Massmann, G. (2019). Iron sulfide formation in young and rapidly-deposited permeable sands at the land-sea transition zone. Science of the Total Environment 649, 264-283.

44. Burke, V., Schneider, L., Greskowiak, J., Zerball-van Baar, P., Sperlich, A., Dünnbier, U., Massmann, G. (2018). Trace organic removal during river bank filtration for two types of sediment. Water 10, 1736.

43. Seibert, S.L., Holt, T., Reckhardt, A., Ahrens, J., Beck, M., Pollmann., T., Giani, L., Waska, H., Böttcher, M.E., Greskowiak, J., Massmann, G. (2018). Hydrochemical evolution of a freshwater lens below a barrier island (Spiekeroog, Germany): The role of carbonate mineral reactions, cation exchange and redox processes. Appl. Geochem. 92, 186-208

42. Holt,T., Seibert, S. L., Greskowiak, J., Freund, H., Massmann, G. (2017). Impact of storm tides and inundation frequency on water table salinity and vegetation on a juvenile barrier island. Journal of Hydrology 554: 666-679

41. Greskowiak, J., Hamann, E., Burke, V., Massmann, G. (2017). The uncertainty of biodegradation rate constants of emerging organic compounds in soil and groundwater - A compilation of literature values for 82 substances. Water Research 126, 122-133

40. Reckhardt, A., Beck, M., Greskowiak, J., Schnetger, B., Böttcher, M. E., Gehre, M., Brumsack, H.-J. (2017), Cycling of redox-sensitive elements in a sandy subterranean estuary of the southern North Sea, Marine Chemistry,188, 6-17

39. Beck, M, Reckhardt, A., Amelsberg, J., Bartholomä, A., Brumsack, H.-J., Cypionka, H., Dittmar, T., Engelen, B., Greskowiak, J., Hillebrand, H., Holtappels, M., Neuholz, R., Köster, J., Kuypers, M.M., Massmann, G., Meier, D., Niggemann, J., Paffrath, R., Pahnke, K., Rovo, S., Striebel, M., Vandieken, V., Wehrmann, A., Zielinski, O. (2017), The drivers of biogeochemistry in beach ecosystems: A cross-shore transect from the dunes to the low water line, Marine Chemistry, 190, 35-50.

38. Burke, V., Greskowiak, J., Massmann, G. (2017). Redox and Temperature Dependent Attenuation of Twenty Organic Micropollutants - A Systematic Column Study. Water Environment Research 89(2), 155-167

37. Nham, H.T.T., Greskowiak, J., Hamann, E., Meffe, R., Hass, U., Massmann, G. (2016), Long-term transport behavior of psychoactive compounds in sewage-affected groundwater, Grundwasser, 21(4):321-332.

36. Ehlert, C., Reckhardt, A., Greskowiak, J., Liguori, B.T.P, Böning, P., Paffrath, R., Brumsack, H.-J., Pahnke, K. (2016),  Transformation of silicon in a sandy beach ecosystem: Insights from stable silicon isotopes from fresh and saline groundwaters, Chemical Geology, 440, 207-218.

35. Burke, V., Richter, D., Greskowiak, J., Mehrtens, A., Schulz, L., Massmann, G. (2016), Occurrence of Antibiotics in Surface and  Groundwater of a Drinking Water Catchment Area, Water Environment Research, 88 (7), 652-659.

34. Hamann, E., Stuyfzand, P.J., Greskowiak, J., Timmer, H., Massmann, G. (2016), The fate of organic micropollutants during long-term/long-distance river bank filtration, Science of the Total Environment, 545-546: 629-640.

33. Henzler, A., Greskowiak, J., Massmann, G. (2016), Seasonality of temperatures and redox zonations during bank filtration - A modeling approach, Journal of Hydrology, 535: 282-292.

32. Seidel, M., Beck, M., Greskowiak, J., Riedel, T., Waska, H., Suryaputra, I.G.N.A., Schnetger, B., Niggemann, J., Simon, M., Dittmar, T. (2015): Benthic-pelagic coupling of nutrients and dissolved organic matter composition in an intertidal sandy beach, Marine Chemistry, doi:10.1016/j.marchem.2015.08.011.

31. Sengör, S.S., Mayer, K.U., Greskowiak, J., Wanner, C., Su, D., Prommer, H. (2015): A reactive transport benchmark on modeling biogenic uraninite re-oxidation by Fe(III)-(hydr)oxides, Comp. Geosci., 19: 569-583.

30. Nham, H.T.T., Greskowiak, J., Nödler, K., Rahman, M.A., Spachos. T., Rusteberg, B., Massmann, G., Sauter, M., Licha, T. (2015): Modeling the transport behavior of 16 emerging organic contaminants during soil aquifer treatment. Science of the Total Environment. 514: 450-458

29. Greskowiak, J., Gwo, J., Jacques, D., Yin, J., and Mayer, K.U. (2015): A benchmark for multi-rate surface complexation and 1D dual-domain multi-component reactive transport of U(VI), Comput. Geosci., DOI: 10.1007/s10596-014-9457-4

28. Molins, S., Greskowiak, J., Wanner, C., Mayer, K. U. (2015): A benchmark for microbially mediated chromium reduction under denitrifying conditions in a biostimulation column experiment, Computational Geosciences, DOI: 10.1007/s10596-014-9432-0

27. Röper, T., Greskowiak, J., Massmann, G. (2015): Instabilities of submarine groundwater discharge under tidal forcing, Limnol. Oceanogr. 60(1): 22-28

26. Greskowiak, J. (2014): Tide-induced salt-fingering flow during submarine groundwater discharge, Geophys. Res. Let., doi: 10.1002/2014GL061184

25. Burke, V., Greskowiak, J., Asmuß, T., Bremermann, R., Taute, T., Massmann, G. (2014): Temperature dependent redox zonation and attenuation of wastewater-derived organic micropollutants in the hyporheic zone, Sci. Tot. Environ., 482-483: 53-61

24. Ma, R., C. Zheng, C. Liu, J. Greskowiak, H. Prommer, and J. M. Zachara (2014), Assessment of controlling processes for field-scale uranium reactive transport under highly transient flow conditions, Water Resour. Res., 50, 1006-1024

23. Röper, T., Greskowiak J., Massmann, G. (2014): Detecting small-scale groundwater discharge springs using handheld thermal infrared imagery, Groundwater, 52(6), 936-942

22. Henzler, A.F., Greskowiak J., Massmann, G. (2014): Modeling the fate of organic micropollutants during river bank filtration (Berlin, Germany), J. Cont. Hydrol., 156, 78-92

21. Ma, R., Liu, C., Greskowiak, J., Prommer, H., Zachara, J., Zheng, C. (2014): Influence of calcite on uranium(VI) reactive transport in the groundwater-river mixing zone, J. Cont. Hydrol.,156, 27-37

20. Burke, V., Treumann, S., Duennbier, U., Greskowiak, J., Massmann, G. (2013): Sorption behavior of 20 wastewater originated micropollutants in groundwater - Column experiments with pharmaceutical residues and industrial agents, J. Cont. Hydrol., 154, 29-41.

19. Burke, V., Richter, D., Hass, U., Duennbier, U., Greskowiak, J., Massmann, G. (2013): Redox dependent removal of 27 organic trace pollutants - Compilation of results from tank aeration experiments, Environ. Earth Sci., doi: 10.1007/s12665-013-2762-8

18. Zhang, Y., Prommer, H., Broers, H.-P., Slomp, C.P., Greskowiak J., van der Grift, B., and Van Cappellen, P. (2013), Model-based integration and analysis of biogeochemical and isotopic dynamics in a nitrate-polluted pyritic aquifer, Environ. Sci. Technol. ,47, 10415-10422

17. Meffe, R., Kohfahl, C., Hamann, E., Greskowiak, J., Massmann, G., Dünnbier, U., Pekdeger, A. (2013): Fate of para-toluenesulfonamide (p-TSA) in groundwater under anoxic conditions: modelling results from a field site in Berlin (Germany), Environ. Sci. Poll. Res., DOI: 10.1007/s11356-013-1902-8.

16. Röper, T., Greskowiak, J., Freund, H., Massmann, G. (2013): Freshwater lens formation below juvenile dunes on a barrier island (Spiekeroog, Northwest Germany), Estuarine, Coastal and Shelf Science, vol. 121-122, 40-50.

15. Greskowiak, J., Röper, T., Post, V.E.A. (2013): Closed-Form Approximations for Two-Dimensional Groundwater Age Patterns in a Fresh Water Lens. Ground Water, 51(4), 629-634.

14. Röper, T., Kröger, K.F., Meyer, H., Sültenfuß, J., Greskowiak, J., Massmann, G. (2012). Groundwater ages, recharge conditions and hydrochemical evolution of a barrier island freshwater lens (Spiekeroog, Northern Germany). J. Hydrol., 454, 173-186.

13. Martens, E., Zhang, H., Prommer, P., Greskowiak, J., Jeffrey, M., Roberts, P. (2012). In situ recovery of gold: Column leaching experiments and reactive transport modeling, Hydrometallurgy, 125, 6-23.

12. Sharma, L., Greskowiak, J., Ray, C., Eckert, P., Prommer, H. (2012). Elucidating temperature effects on seasonal variations of biogeochemical turnover rates during riverbank filtration, J. Hydrol., 428, 104-115.

11. Greskowiak, J., Hay, M. B., Prommer, H., Liu, C., Post, V.E.A., Ma, R., Davis, J. A., Zheng, C., Zachara, J. M. (2011). Simulating adsorption of U(VI) under transient groundwater flow and hydrochemistry - Physical versus chemical non-equilibrium model, Water Resour. Res., 47, W08501, doi:10.1029/2010WR010118

10. Yin, J., R. Haggerty, D. L. Stoliker, D. B. Kent, J. D. Istok, J. Greskowiak, and J. M. Zachara (2011). Transient groundwater chemistry near a river: Effects on U(VI) transport in laboratory column experiments, Water Resour. Res., 46, W09509, doi:10.1029/2009WR008781

9. Herold, M., Greskowiak, J., Ptak, T., Prommer, H. (2010). Modelling of an enhanced PAH attenuation experiment and associated biogeochemical changes at a former gasworks site in southern Germany, J. Cont. Hydrol., 119, 99-112.

8. Descourvieres, C., Prommer, H., Oldham, C., Greskowiak, J., Hartog, N. (2010). Kinetic Reaction Modeling Framework for Identifying and Quantifying Reductant Reactivity in Heterogeneous Aquifer Sediments, Environ. Sci. Technol., 44(17), 6698-6705, doi: 10.1021/es101661u.

7. Greskowiak, J., Prommer, H., Liu, C., Post, V.E.A., Ma, R., Zheng, C., Zachara, J. M. (2010), Comparison of parameter sensitivities between a laboratory and field scale model of uranium transport in a dual domain, distributed-rate reactive system, Water Resour. Res., W09509, doi:10.1029/2009WR008781.

6. Ma, R., Zheng C., Prommer, H.,Greskowiak, J., Liu, C., Zachara, J. M., and Rockhold, M. L. (2010). A Field-Scale Reactive Transport Model for U(VI) Migration Influenced by Coupled Multi-Rate Mass Transfer and Surface Complexation Reactions, Water Resour. Res., 46, W05509, doi:10.1029/2009WR008168.

5. Kohfahl, C., Greskowiak, J., and Pekdeger, A. (2007). Effective diffusion and microbiologic activity as constraints describing pyrite oxidation in abandoned lignite mines, Applied Geochemistry, 22(1), 1-16.

4. Greskowiak, J., Prommer, H., Massmann, Nützmann G. (2006). Modeling Seasonal Redox Dynamics and the Corresponding Fate of the Pharmaceutical Residue Phenazone During Artificial Recharge of Groundwater, Environ. Sci. Technol., 40(21), 6615-6621.

3. Massmann, G., Greskowiak, J., Dünnbier U., Zuehlke, S., Knappe A., Pekdeger A., (2006). The impact of variable temperatures on the redox conditions and the behaviour of pharmaceutical residues during artificial recharge, Journal of Hydrology, 328(1-2), 141-156.

2. Greskowiak, J., Prommer, H., Vanderzalm, J., Pavelic, P., Dillon, P., (2005). Modelling of carbon cycling and biogeochemical changes during injection and recovery of reclaimed water at Bolivar, South Australia, Water Resour. Res., 41(10), W10418, doi:10.1029/2005WR004095.

1. Greskowiak, J., Prommer, H., Massmann, G., Johnston, C. D., Nützmann G., Pekdeger, A. (2005). The impact of variably saturated conditions on the hydrochemistry during artificial recharge of groundwater, Applied Geochemistry, 20(7), 1409-1426.

(Changed: 26 Aug 2022)