Marcel G. Schaap

Marcel Schaap
Associate Professor
Shantz Building, 524

Department of Soil Water and Environmental Science
The University of Arizona
P.O. Box 210038
Tucson, Arizona 85721-0038

Office Phone: 
(520) 626-4532
(520) 621-1647

Ph.D., Environmental Sciences, 1996. University of Amsterdam, the Netherlands
M.S., Physical Geography, 1990. University of Amsterdam
B.A., Chemistry, 1984. University of Amsterdam


2006-present.  Department of Soil, Water and Environmental Science, University of Arizona.

2000-2006.  Assistant/Associate Professional Research Scientist, University of California, Riverside.

2005.  Letter of Appointment, Desert Research Institute, Las Vegas, Nevada.

1996-2006.  Cooperative Employee, George E. Brown, Jr. Salinity Laboratory (USDA-ARS), Riverside, CA.

1996-2000.  Postdoctoral Researcher. University of California, Riverside.

My research focuses on the determination of hydraulic soil properties, vadose zone/critical zone transport processes, pore-scale fluid dynamics, but also dielectric properties of soils and other porous media. Some of my research is of a rather fundamental nature, but yet pertinent on a societal level as it contributes to improving carbon dioxide capture and geological sequestration in deep saline aquifers or the characterization of deep vadose zones, some of which are contaminated with radioactive waste. I currently have 47 publications and a total of over 1400 citations.

I teach at the undergraduate and graduate levels that facilitates the understanding of fundamental physical properties and processes associated with the soil-vegetation-atmosphere system. Schaap uses innovative technologies, including computer and audiovisual recordings. Schaap teaches SWES 420/520 'Environmental Physics” and SWES 605 "Modeling of Mass and Energy Flow in Soils". I also lecture in other departmental courses (SWES 430/530, SWES 470/570, SWES 200) and co-teaches a new course in Spring 2012, HWRS/SWES 696i “Advanced Topics in Pore-Scale Processes”.

Ye, M., M.G. Schaap, R. Khaleel, and J. Zhu, 2007. Simulation of Field Injection Experiments in a Layered Formation Using Geostatistical Methods and Artificial Neural Network. Water Resour. Res., 43, W07413, doi:10.1029/2006WR005030).

Schaap, M.G, M.L. Porter, B.S.B. Christensen, and D. Wildenschild, 2007. Comparison of Pressure-saturation Characteristics Derived from Computed Tomography and Lattice Boltzmann Simulations, Water Resour. Res., 43, W12S06, doi:10.1029/2006WR005730

Huang, H. D.T. Thorne, M.G. Schaap, M.C. Sukop. 2007. A Priori Determination of Contact Angles in Shan-and- Chen-type Multi-component Multiphase Lattice Boltzmann Models. Phys Rev E., 76, 066701.

Borgesen, C.D., B.V. Iversen, O.H. Jacobsen and M.G. Schaap, 2008. Pedotransfer Functions Estimating Soil Hydraulic Properties using Different Soil Parameters. Hydrological Processes, 22(11):1630-1639.

Toth, T., M.G. Schaap., and Z. Molnar, 2008. Utilization of Soil-plant Interrelations Through the use of Multiple Regression and Artificial Neural Network in order to Predict Soil Properties in Hungarian Solonetzic Grasslands. Cereal Research Communications, 36:1447-1450 (Part 3, Suppl. S).

Kelleners, T.J., E.S. Ferre-Pikal, M.G. Schaap, G.B. Paige, 2009. Calibration of Hydra Impedance Probes Using Electric Circuit Theory. Soil Soc. Am. J., 73(2):453-465.

Twarakavi,N.K.C., Jirka Šimůnek and M. G. Schaap, 2009. Development of Pedotransfer Functions for Estimation of Soil Hydraulic Parameters Using Support Vector Machine, Soil Science Society of Am. J., 73(5):1443-1452.

Deng H., M. Ye, M. G. Schaap, R. Khaleel, 2009. Quantification of Uncertainty in Pedotransfer Function-based Parameter Estimation for Unsaturated Flow Modeling, Water Resour. Res., 45, W04409, doi:10.1029/2008WR007477.

Porter, M.L., M.G. Schaap, and D. Wildenschild, 2009. Lattice-Boltzmann Simulations of the Capillary Pressure -Saturation - Interfacial Area Relationship in Porous Media, Advances in Water Resources., 32(11):1632-1640.

Wang T., V. A. Zlotnik, J. Šimůnek, M. G. Schaap, 2009. Using Pedotransfer Functions in Vadose Zone Models for Estimating Groundwater Recharge in Semiarid Regions, Water Resour. Res., 45, W04412, doi:10.1029/2008WR006903.

Twarakavi, N.K.C., Jirka Šimůnek and M. G. Schaap, 2010. Can Texture-based Classification Optimally Classify Soils with Respect to Soil Hydraulic Parameters? Wat. Resour Res., 46, W01501, doi:10.1029/2009WR007939.Schapp, M.G. and M. Tuller, 2010. Quantitative Pore-Scale Investigations of Multiphase Bio/Geo/Chemical Processes, Vadose Zone Journal, 9(3): 573-575.

Vereecken, H., M. Weynants, M. Javaux, Y. Pachepsky, M.G. Schaap, and M.Th. van Genuchten, 2010. Using Pedotransfer Functions to Estimate the van Genuchten-Mualem Soil Hydraulic Properties: A Review, Vadose Zone Journal., 9(4):795-820, DOI: 10.2136/vzj2010.0045.

Chorover, J., P. Troch, C, Rasmussen, P. Brooks, J. Pelletier, D. Breshears, T. Huxman, K. Lohse, J. McIntosh, T. Meixner, S. Papuga, M.G. Schaap, M. Litvak, J. Perdrial, A. Harpold, M. Durcik, 2011. Jemez River Basin – Santa Catalina Mountains (JRB-SCM) Critical Zone Observatory: Probing how water, carbon, and energy drive landscape evolution and surface water response, Vadose Zone Journal (In press, August 4, 2011).

Schaap, M.G., and M.L. Porter. Simulating Fluid Wicking Into Porous Media with the Lattice Boltzmann Method, in: Wicking in Porous Materials: Traditional and Modern Modeling Approaches, p327-353.

Schaap, M.G., 2013 Description, Analysis, and Interpretation of an Infiltration Experiment in a Semiarid Deep Vadose Zone, in: Mishra, P, and C. Kuhlman, Springer Science+Business Media New York, in press, 26pp.