Willmann, Matthias, Dr.

Research Interests

• Stochastic Modeling, Upscaling

• Numerical Modeling of Contaminant Transport in Heterogeneous Aquifers

• Reactive Transport Modeling

• Interpretation of Hydraulic Tests

• Performance Assessment of Deep Geological Repositories for Nuclear Waste

Current Projects

• Uscaling methods for nuclear waste repository assessment

• Nitratreduktion Klettgau (Nitrate reduction Klettgau)

Teaching

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

Groundwater I (MSc. Eng. Geol.)

Education

• 2008 PhD in Hydrogeology at the Technical University of Catalonia (UPC), Barcelona, Spain
Thesis: Scaling of Subsurface Processes in Heterogeneous Aquifers: From Hydraulic Testing to the Use of Memory Functions
Advisors: J. Carrera and X. Sánchez-Vila

• 2003 Visiting Student at the Politecnico di Milano, Italy

• 2001 M.Sc. in Applied Environmental Geoscience at the University of Tübingen, Germany
Thesis: Modelling study on void evolution beneath dams in gypsum environments with the example of Horsetooth dam, Colorado.
Advisors: R. Liedl and M. Sauter

• 1998-1999 Exchange Student at the Northern Arizona University, Flagstaff, USA

• 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 predictons. 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., W. Kinzelbach, and F. Stauffer (2010): The role of porosity for transport block-upscaling in a clay-rich sedimentary formation. In Managing Groundwater and the Environment, IAHS Publ. (accepted).

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.