Applied Geology

Dr. Tobias GEYER / Akademischer Rat (temporary)

RESEARCH INTERESTS


  • Hydrogeology of fractured and karstified rocks
  • Catchment hydrogeology
  • Simulation of flow and transport in heterogeneous media
  • Application of artificial and environmental tracers in hydrogeology
  • Groundwater vulnerability
  • Hydraulic methods for subsurface characterization



PUBLICATIONS

Journals (ISI)

Geyer, T., Birk, S., Reimann, T., Dörfliger, Sauter, M. (2013): Differentiated characterization of karst aquifers: some contributions. Carbonates Evaporites. Doi 10.1007/s13146-013-0150-9.

Kordilla, J., Tartakovsky, A.M., Geyer, T. (2013): A smoothed particle hydrodynamics model for droplet and film flow on smooth and rough fracture surfaces. Advances in Water Resources 59: 1-14.

Licha, T., Niedbala, A., Bozau, E., Geyer, T. (2013): An assessment of selected properties of the fluorescent tracer, Tinopal CBS-X related to conservative behavior, and suggested improvements. Journal of Hydrology, doi: 10.1016/j.jhydrol.2013.01.006.

Reh, R., Licha, T., Geyer, T., Nödler, K., Sauter, M. (2013): Occurrence and spatial distribution of organic micro-pollutants in a complex hydrogeological karst system during low flow and high flow periods, results of a two-year study. Science of the Total Environment 443. 438-445.

Doummar, J., Sauter, M., Geyer, T. (2012): Simulation of flow processes in a large scale karst system with an integrated catchment model (Mike She) - Identification of relevant parameters influencing spring discharge. Journal of Hydrology 426: 112-123.

Hillebrand, O., Nödler, K., Licha, T., Sauter, M., Geyer, T. (2012a): Identification of the attenuation potential of a karst aquifer by an artificial dualtracer experiment with caffeine. Water Research 46(16): 5381-5388.

Hillebrand, O., Nödler, K., Licha, T., Sauter, M., Geyer, T. (2012b): Caffeine as an indicator for the quantification of untreated wastewater in karst systems. Water Research 46(2): 395-402.

Kordilla, J., Sauter, M., Reimann, T., Geyer, T. (2012): Simulation of saturated and unsaturated flow in karst systems at catchment scale using a double continuum approach. Hydrology and Earth System Sciences 16: 3909-3923.

Reimann, T., Geyer, T., Shoemaker, B., Liedl, R., Sauter, M. (2011): Effects of dynamically variable saturation and matrix-conduit coupling of flow in karst aquifers. Water Resources Research 47, W11503, doi:10.1029/2011WR010446.

Reimann, T., Rehrl, C., Shoemaker, W.B., Geyer, T., Birk, S. (2011): The significance of turbulent flow representation in single‐continuum models. Water Resources Research 47, W09503, doi:10.1029/2010WR010133.

Heinz, B., Birk, S., Liedl, R., Geyer, T., Straub, K. L., Andresen, J., Bester, K., Kappler, A. (2009): Water quality deterioration at a karst spring (Gallusquelle, Germany) due to combined sewer overflow: Evidence of bacterial and micro-pollutant contamination. Environmental Geology 57(4): 797-808.

Geyer, T., Birk, S., Liedl, R., Sauter, M. (2008): Quantification of temporal distribution of recharge in karst systems from spring hydrographs. Journal of Hydrology 348: 452-463.

Heinz, B., Birk, S., Liedl, R., Geyer, T., Straub, K., L., Bester, K., Kappler, A. (2007): Vulnerability of a karst spring to waste water infiltration (Gallusquelle, Southwest Germany). Austrian Journal of Earth Sciences 99: 11-17.

Geyer, T., Birk, S., Licha, T., Liedl, R., Sauter, M. (2007): Multi-tracer test approach to characterize reactive transport in karst aquifers. Ground Water 45(1): 36-45.

Brosig, K., Geyer, T., Subah, A., Sauter, M. (2006): Travel time based approach for the assessment of vulnerability of karst groundwater. Environmental Geology 54(5): 905-911.

Sauter, M., Kovács, A., Geyer, T., Teutsch, G. (2006): Modellierung der Hydrodynamik von Karstgrundwasserleitern - Eine Übersicht. Grundwasser 11(3): 143-156.

Birk, S., Geyer, T., Liedl, R., Sauter, M. (2005): Process-based interpretation of tracer tests in carbonate aquifers. Ground Water 43(3): 381-388.


Books/Series

Reh, R., Geyer, T., Licha, T., Nödler, K., Sauter, M., Schlösser-Kluger, T., Jaeger-Wunderer, M. (2013): Hydrodynamik und Stofftransport in einem urban geprägten Karstgrundwassersystem. Altlasten-annual 2012, Hessisches Landesamt für Umwelt und Geologie: 43-49. ISBN 978-3-89026-370-0.

Geyer, T., Selg, M., Gudera, T., Sauter, M. (2012): Langzeitabflussverhalten der Gallusquelle und des Blautopfs - relative Bedeutung der Matrix und des Karströhrensystems. Laichinger Höhlenfreund 46: 63-74. ISSN 0344 6832.

Schmidt, S., Fischer, S., Toll, M., Ries, F., Zayed, O., Guttman, J., Marei, A., Weiss, M., Geyer, T., Sauter, M. (2012): Design and setup of a high resolution hydrometric monitoring network in a semi‐arid karst environment ‐ West Bank. In: Rausch et al. (Eds): Hydrogeology of arid environments, Proceedings: 147-150. ISBN 978-3-443-01070-6.

Kordilla, J., Geyer, T., Tartakowsky, A. (2011): Simulation of gravity driven free-surface flow in fractured geological media. In: Rung & Ulrich (Eds): 6th International SPHERIC Workshop, 8-10 June 2011, Hamburg. Schriftenreihe Schiffbau 658: 153-158. ISBN 978-3-89220-658-3

Licha, T., Nödler, K., Hillebrand, O., Reh, R., Geyer, T. (2011): Spurenorganika im Wasserkreislauf - neue Perspektiven in der Umweltforensik. Altlasten-annual 2011, Hessisches Landesamt für Umwelt und Geologie: 83-85. ISBN 978-3-89531-870-2.

Massmann, C., Birk, S., Liedl, R., Geyer, T. (2006): Identification of hydrogeological models: application to tracer test analysis in a karst aquifer. In: Bierkens, M. F. P., Gehrels, J. C., Kovar, K. (Hrsg.), Calibration and reliability in groundwater modelling: From uncertainty to decision making. IAHS Publication 304: 59-64.


Other Papers

Reimann, T., Giese, M., Geyer, T., Liedl, R., Maréchal, J.C., Shoemaker, W.B. (2013): Representation of water abstraction from a karst conduit with numerical discrete-continuum models. Hydrology and Earth System Sciences Discuss. 10: 4463-4487.

Licha, T., Thiem, A., Geyer, T., Scheyth, T. (2012): Risikomanagement von Spurenstoffen und Krankheitserregern in ländlichen Karsteinzugsgebieten (AGRO). In: Dechema (Eds) BMBF-Fördermaßnahme: RiSKWA – Risikomanagement von neuen Schadstoffen und Krankheitserregern im Wasserkreislauf: 10-12.

Sauter, M., Schmidt, S., Abusaada, M., Reimann, T., Liedl, R., Geyer, T. (2011): Water resources manegement in karst aquifers – a concept for the Lower Jordan Valley. Proceedings: International conference on integrated water resources management: Management of water in a changing world: Lessons learnt and innovative perspectives. BMBF. Dresden 12.-13.Oktober 2011, 10 pp.

Reimann, T., Liedl, R., Lompe, K. M., Geyer, T., Sauter, M., Birk, S., Benischke, R. (2011): The significance of unsteady and nonuniform flow in variably filled conduits for karst aquifer characterization. Proc. H2Karst, 9th Conference on Limestone Hydrogeology, Besançon, France, September 1-4, 2011: 419-421.

Birk, S., Geyer, T., Sauter, M. (2008): Modellierung von Karstgrundwasserleitern. Proc. Tagung Numerische Grundwassermodellierung: Konzeption, komplexe Anwendung, Entscheidungsgrundlage, Graz, June 24-25, 2008: 24-27.

Reimann, T., Rehrl, C., Geyer, T., Liedl, R., Birk, S., Sauter, M. (2008): Anwendung von Hybridmodellen in Karstgrundwasserleitern. Proc. Tagung Numerische Grundwasser-modellierung: Konzeption, komplexe Anwendung, Entscheidungsgrundlage, Graz, June 24-25, 2008: 34-37.

Reimann, T., Geyer, T., Dörfliger, N., Birk, S., Jourde, H., Ladouche, B., Liedl, R., Sauter, M. (2008): Hydraulic characterisation of a karst aquifer using large-scale pumping tests in the conduit system. XIIIth IWRA World Water Congress, Montpellier France, 9 pp.

Heinz, B., Birk, S., Liedl, R., Geyer, T., Straub, C., Bester, K., Kappler, A. (2006): Vulnerability of a Karst spring to waste water infiltration. All about karst and water - Decision making in a sensitive environment, International Conference Vienna October 2006: 283-289.

Geyer, T., Licha, T., Sauter, M., Birk, S., Liedl, R. (2005): Process-based multi-tracer test modelling in a karstic system. Proc. 5th International Conference on Calibration and Reliability in Groundwater Modelling, The Hague (Scheveningen), The Netherlands, 6 – 9 June 2005: 189-193.

Massmann, C., Birk, S., Liedl, R., Geyer, T. (2005): Identification of hydrogeologic models: application to tracer test analysis in a karst aquifer. Proc. 5th International Conference on Calibration and Reliability in Groundwater Modelling, The Hague (Scheveningen), The Netherlands, 6 – 9 June 2005: 9-14.


TEACHING

Teaching in the International Master Course -Hydrogeology and Environmental Geoscience- (HEG) at the University of Göttingen

[1] Introduction to hydrogeology (lecture and seminar, shared with Prof. M. Sauter, approx. 40 students, 3 semester hours)

[2] Hydrogeological field trip and hydrological measuring (field course, shared with Prof. M. Sauter, approx. 20 students, 1 semester hour)

[3] Catchment hydrogeology (lecture and field course, approx. 20 students, 3 semester hours)

[4] Simulation of flow and transport in fractured and karstified aquifers (lecture, approx. 10 students, 1 semester hour)

[-] Basin scale mass flow (lecture, approx. 15 students, 1 semester hour, only 2010)


Student Supervision

Ph.D. theses

Giese, M.: Development and application of nummerical modelling approaches for characterisation of flow and transport in karst aquifers, GZG (ongoing).

Kordilla, J.: Simulation of unsaturated flow in fractured rocks. Ph.D., Georg-August-Universität Göttingen, GZG (ongoing).

Musallam, S.: Application of xenobiotics as indicators for groundwater vulnerability in carbonate aquifer systems.

Oehlmann, S.: Development of a process-based modeling approach for simulation of residence time distribution in karst systems. Ph.D., Georg-August-Universität Göttingen, GZG (ongoing).

Reh, R.: Hydrodynamik und Stofftransport in einem Karstgrundwasserleiter – Schutz der Trinkwassergewinnungsanlagen in Korbach. Ph.D., Georg-August-Universität Göttingen, GZG (ongoing).

Doummar, J. (2012): Identification of quantitative parameters for vulnerability assessment in karst aquifers. Ph.D., Georg-August-Universität Göttingen, GZG.

M.Sc. and B.Sc. theses 2009-2012

Donath, F. (2013): Characterisation of groundwater surface water interaction based on hydrochemistry, multivariate statistical methods and numerical modelling: Application to Ngongotaha Stream, Lake Rotorua catchment, New Zealand. M.Sc., Georg-August-Universität Göttingen, GZG.

Baierl, M. (2012): Characterization of carbonate aquifers with hydraulic pumping tests – comparison of analytical and numerical data evaluation methods. M.Sc., Georg-August-Universität Göttingen, GZG (unpublished).

Hülsmann, L. (2012): Processed-based hydrological modeling using SWAT - Estimation of groundwater recharge in the large-scale river catchment Kharaa / Mongolia. M.Sc., Georg-August-Universität Göttingen, GZG (unpublished).

Maier, N. (2012): Process-based interpretation of spring responses in karst systems- Example Rhume spring. M.Sc., Georg-August-Universität Göttingen, GZG.

Scherer, L. (2012): Process-based water balance modelling in karst catchments on the example of the Rhumespring. M.Sc., Georg-August-Universität Göttingen, GZG (unveröffentlicht).

Ezzel, B. (2011): Characterization of a karst aquifer system with hydraulic tests: Korbach, Germany. M.Sc., Georg-August-Universität Göttingen, GZG.

Hinrichsen, S. (2011): Hydrochemische Untersuchungen im Einzugsgebiet der Rhumequelle. B.Sc., Georg-August-Universität Göttingen, GZG (unpublished).

Weidemann, M. (2011): Development of a water balance for the catchment areas of the rivers Itter, Twiste and Werbe (Ldkrs. Waldeck Frankenberg), M.Sc., Georg-August-Universität Göttingen, GZG (unpublished).

Wenzel, C. (2011): Hydrochemische Fließpfadcharakterisierung im Einzugsgebiet der Nieme. B.Sc., Georg-August-Universität Göttingen, GZG (unpublished).

Hellbach, S. (2010): Wasserbilanz für das Einzugsgebiet der Wassergewinnungsanlage Weendespring / Südniedersachsen. Diplom (M.Sc.), Georg-August-Universität Göttingen, GZG (unpublished).

Kordilla, J. (2009): Simulation of flow and transport in a karst aquifer applying the double-continuum approach (Gallusquelle/Swabian alb). Diplom (M.Sc.), Georg-August-Universität Göttingen, GZG (unpublished).


PROFESSIONAL SERVICE

2013 Guest-Editor in the Springer Journal Grundwasser; Special Issue: Karst-Hydrogeology (04/2013) (with Prof. N. Goldscheider (KIT Karlsruhe)).

2011, 2012, 2013 Convener of the special session -Fissured and karstified aquifers- at EGU (European Geosciences Union) General Assembly in Vienna, Austria.

2010, 2012, Chair of sessions (Karst hydrogeology, Hydrogeology of hard rocks) at FHDGG conferences in Tübingen and Dresden.

Since 2011, Member of the study commission of the Faculty of Geoscience and Geography at the Georg-August-Universität Göttingen.

Since 2010, Member of the admission committee of the International Master Course Hydrogeology and Environmental Geoscience at the Georg-August-Universität Göttingen.

Since 2006, Reviewer for international and national scientific journals.