Willmann, Matthias, Dr.

Position

Senior Research Associate (Oberassistent) and Lecturer

Research Interests

Stochastic Groundwater Flow and Transport Modeling, Upscaling

Flow and Transport Processes in Fractured Aquifers

Reactive Transport Modeling, Mixing Processes

Interpretation of Hydraulic Tests

Nuclear Waste Disposal, CO2 Sequestration, and Geothermal Energy

Current Projects

Block-upscaling of contaminant transport in heterogeneous aquifers (PI; Funding: SNF)

Upscaling methods for nuclear waste repository assessment (Funding: NAGRA)

Nitrate reduction Klettgau (Funding: Kanton SH)

Advanced hydrodynamic processes of CO2 sequestration in deep saline formations (Funding: CIUDEN, Spain)

Teaching

Groundwater I (MSc. Eng. Geol.)

Groundwater Hydrology Field Course (MSc. Env. Eng.)

Groundwater II (MSc. Env. Eng.)

Student Supervision: Alina Akhmetsafina (PhD, 2011-)

Education

2008 PhD in Hydrogeology at the Technical University of Catalonia (UPC), Barcelona, Spain (Advisors: Jesus Carrera and Xavier Sánchez-Vila)

2001 M.Sc. in Applied Environmental Geoscience at the University of Tübingen, Germany

1998 Vordiplom (Intermediate Examination) in Geology at the University of Tübingen, Germany

Publications

Journals

Willmann, M., J. Carrera, X. Sánchez-Vila, O. Silva, and M. Dentz (2010): Coupling of Mass Transfer and Reactive Transport for Non-Linear Reactions in Heterogeneous Media. Water Resources Research, 46, W07512, doi:10.1029/2009WR007739.

Riva, M. and M. Willmann (2009): Impact of log-transmissivity variogram structure on groundwater flow and transport predictions. Advances in Water Resources, 32(8), 1311-1322, doi:10.1016/j.advwatres.2009.05.007.

Silva, O., J. Carrera, S. Kumar, M. Dentz, A. Alcolea, and M.Willmann (2009): A general real-time formulation for multi-rate mass transfer problems, Hydrol. Earth Syst. Sci., 13, 1399-1411.

Willmann, M., J. Carrera, and X. Sánchez-Vila (2008): Transport upscaling in heterogeneous aquifers: What physical parameters control memory functions?, Water Resources Research., 44, W12437, doi:10.1029/2007WR006531.

Willmann, M., J. Carrera, X. Sánchez-Vila and, E. Vàzquez-Suñé (2007): On the meaning of transmissivity values obtained from recovery tests. Hydrogeology Journal, 15, 833-842, doi10.1007/s10040-006-0147-8.

Riva, M., X. Sánchez-Vila, A. Guadagnini, M. de Simoni, and M. Willmann (2006): Travel Time and Trajectory Moments of Conservative Solutes in Two-Dimensional Convergent Flows. Journal of Contaminant Hydrology , 82(1-2), 23-46.

Conferences

Willmann, M., and W. Kinzelbach (2011): Particle Tracking in a Hybrid Fracture-Matrix Formation, Abstract H21B-1079 presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec.

Willmann, M., W. Kinzelbach, and F. Stauffer (2011): The role of porosity for transport block-upscaling in a clay-rich sedimentary formation. In Managing Groundwater and the Environment, IAHS Publ. 341 p. 196-200.

Willmann, M., W. Kinzelbach, and F. Stauffer (2010): Transport upscaling of a fractured clay-rich sedimentary formation, Abstract H51C-0908 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Willmann, M., W. Kinzelbach, and F. Stauffer (2010): Upscaling of advective transport in a fractured clay-rich sedimentary formation, Proceedings of XVIII International Conference on Water Resources, CMWR 2010, J. Carrera (Ed).

Willmann, M., J. Carrera, X. Sánchez-Vila, O. Silva, and M. Dentz (2009): Coupling of Mass Transfer and Reactive Transport for Non-Linear Reactions in Heterogeneous Media. Eos, Trans. AGU, 90(52), Fall Meet. Suppl., Abstract H34D-07.

Willmann, M., W. Kinzelbach, and F. Stauffer (2009): Transport block-upscaling in a clay-rich sedimentary aquifer using multi-porosity models. Proceedings of ModelCare2009, Wuhan, China.

Willmann, M., W. Kinzelbach, F. Stauffer, B. Lanyon, and P. Marschall (2009): Upscaling of advective transport in a fractured clay-rich sedimentary formation. Geophysical Research Abstracts, Vol. 11, 8600.

Carrera, J., M. Willmann, X. Sánchez-Vila, O. Silva, M. Saaltink, and S. Bea (2009): Non-local in time formulations for reactive transport, Geophysical Research Abstracts, Vol. 11, 10290.

Willmann, M., J. Carrera, and X. Sánchez-Vila (2008): Modeling Reactive Transport in Heterogeneous Aquifers Using Multiple-Rate Mass Transfer, Eos, Trans. AGU, 89 (53), Fall Meet. Suppl., Abstract H24B-04.

Carrera, J., Bea, S. A., Willmann, M., Silva, O., Slooten, L. J., Dentz, M., Bolster, D., Gamazo, P., Saaltink, M. W., and Jodar, J. (2008): Distinguishing mixing and spreading in multiphase transport through heterogeneous media, Computational methods in water resources, XVII, San Francisco.

Carrera, J., M. Willmann, X. Sánchez-Vila, M. Dentz, A. Alcolea (2007): The path from stochastic theory to applications in groundwater transport, Geophysical Research Abstracts, Vol. 9, 06174.

Willmann, M, X. Sánchez-Vila, and J. Carrera (2006): Block-upscaling Using Multi-Rate Mass Transfer. Eos, Trans. AGU, 87 (521), Fall Meet. Suppl., Abstract H21C-1391.

Carrera, J., P. Gouze, M. Willmann, Y. Méléan, M. Dentz, T. Le Borgne, A. Alcolea, X. Sánchez-Vila (2006) Memory Functions to Represent Transport Through Heterogeneous Media: Can They Make Physical Sense? Eos, Trans. AGU, 87 (521), Fall Meet. Suppl., Abstract H14B-01.

Willmann, M., X. Sánchez-Vila, J. Carrera, and A. Guadagnini (2006): Block-upscaling of transport in heterogeneous aquifers. In Uncertainty to Decision Making, IAHS Publ. 304, 158-164.

Willmann, M., X. Sánchez-Vila, and J. Carrera (2006): Block-upscaling of transport: Comparison of ADE and mobile/immobile approach. In Pre-Proceedings, Book of Abstracts, of IAHR-GW2006, Groundwater Hydraulics in Complex Environments, Toulouse, France, 61-62.

Riva, M., M. de Simoni, and M. Willmann (2005): Effect of variogram model choice on flow and travel time predictors in radial flows. In Geostatistics for Environmental Applications, ed. Springer, 273-284.

Willmann, M., J. Carrera, X. Sánchez-Vila, and E. Vázquez-Suñé (2004): What is obtained from a recovery test in heterogeneous aquifers? Geophysical Research Abstracts, Vol. 6, 04364.

Riva, M., X. Sánchez-Vila, M. de Simoni, A. Guadagnini, and M. Willmann (2004): Effect of Heterogeneity on aquifer reclamation time. In geoENV IV – Geostatistics for Environmental Applications, ed. Kluwer, 259-270.

Willmann, M., R. Liedl, S. Birk, and M. Sauter (2002): Leakage of Dams due to Rock Dissolution in Gypsum Karst Regions with the Example of Horsetooth Dam, Colorado. In Proceedings of Third International Conference on Water Resources and Environment Research (ICWRER), Dresden, Germany, 176-180.