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Steven Yabusaki

Steven Yabusaki

Pacific Northwest National Laboratory
PO Box 999
Richland, WA 99352

Education and Credentials

  • M.S. Applied Mathematics, University of Washington, 1986
  • M.S. Civil Engineering, Colorado State University, 1980
  • B.S. Civil Engineering, University of Hawaii, 1978

PNNL Publications


  • Fang Y., S.B. Yabusaki, A. Ahkami, X. Chen, and T.D. Scheibe. 2019. "An efficient three-dimensional rhizosphere modeling capability to study the effect of root system architecture on soil water and reactive transport." Plant and Soil 441, no. 1-2:33-48. PNNL-SA-138450. doi:10.1007/s11104-019-04068-z


  • Birkholzer J., S.B. Yabusaki, and O. Kolditz. 2016. "Benchmarking Initiatives." In Thermo-Hydro-Mechanical-Chemical Processes in Fractured Porous Media: Modelling and Benchmarking: Benchmarking Initiatives, edited by O Kolditz, et al. 3-11. Cham:Springer International Publishing. PNNL-SA-114736. doi:10.1007/978-3-319-29224-3



  • Napier B.A., and S.B. Yabusaki. 2014. Methodology for Estimating the Aqueous Radionuclide Inventory from a Severe Reactor Accident. PNNL-23147. Richland, WA: Pacific Northwest National Laboratory.
  • Qafoku N., B.N. Gartman, R.K. Kukkadapu, B.W. Arey, K.H. Williams, P.J. Mouser, and S.M. Heald, et al. 2014. "Geochemical and Mineralogical Investigation of Uranium in Multi-element Contaminated, Organic-rich Subsurface Sediment." Applied Geochemistry 42. PNNL-SA-86519. doi:10.1016/j.apgeochem.2013.12.001


  • Fang Y., B.N. Nguyen, K.C. Carroll, Z. Xu, S.B. Yabusaki, T.D. Scheibe, and A. Bonneville. 2013. "Development of a coupled thermo-hydro-mechanical model in discontinuous media for carbon sequestration." International Journal of Rock Mechanics and Mining Sciences 62. PNNL-SA-88739. doi:10.1016/j.ijrmms.2013.05.002
  • Lu D., M. Ye, P.D. Meyer, G.P. Curtis, X. Shi, X. Niu, and S.B. Yabusaki. 2013. "Effects of error covariance structure on estimation of model averaging weights and predictive performance." Water Resources Research 49, no. 9:6029-6047. PNNL-SA-99813. doi:10.1002/wrcr.20441
  • Yeh G.T., J. Gwo, M. Siegel, M. Li, Y. Fang, F. Zhang, and W. Luo, et al. 2013. "Innovative mathematical modeling in environmental remediation." Journal of Environmental Radioactivity 119. PNNL-SA-95622. doi:10.1016/j.jenvrad.2011.06.010
  • Zachara J.M., P.E. Long, J. Bargar, J.A. Davis, P.M. Fox, J.K. Fredrickson, and M.D. Freshley, et al. 2013. "Persistence of uranium groundwater plumes: Contrasting mechanisms at two DOE sites in the groundwater-river interaction zone." Journal of Contaminant Hydrology 147. PNNL-SA-88773. doi:10.1016/j.jconhyd.2013.02.001


  • Fang Y., M.J. Wilkins, S.B. Yabusaki, M.S. Lipton, and P.E. Long. 2012. "Evaluation of a Genome-Scale In Silico Metabolic Model for Geobacter metallireducens Using Proteomic Data from a Field Biostimulation Experiment." Applied and Environmental Microbiology 78, no. 24:8735 - 8742. PNNL-SA-88037. doi:10.1128/AEM.01795-12


  • Campbell K.M., H. Veeramani, H. Veeramani, K. Ulrich, L. Blue, D.E. Giammar, and R. Bernier-Latmani, et al. 2011. "Oxidative Dissolution of Biogenic Uraninite in Groundwater at Old Rifle, CO." Environmental Science & Technology 45, no. 20:8748-8754. PNNL-SA-83206. doi:10.1021/es200482f
  • Campbell K.M., J.A. Davis, J.R. Bargar, J.R. Bargar, D.E. Giammar, R. Bernier-Latmani, and R.K. Kukkadapu, et al. 2011. "Composition, stability, and measurement of reduced uranium phases for groundwater bioremediation at Old Rifle, CO." Applied Geochemistry 26. PNNL-SA-84934. doi:10.1016/j.apgeochem.2011.03.094
  • Ulrich K., H. Veeramani, H. Veeramani, E.J. Schofield, J.O. Sharp, E. Suvorova, and J.E. Stubbs, et al. 2011. "Biostimulated uranium immobilization within aquifers - from bench scale to field experiments." In 11th International Mine Water Association Congress (IMWA 2011): Mine Water - Managing the Challenges, September 4-11, 2011, Aachen, Germany, edited by TR Rude, A Freund and C Wolkersdorfer, 627-631. Wendelstein:International Mine Water Association. PNNL-SA-84704.
  • Yabusaki S.B., Y. Fang, K.H. Williams, C.J. Murray, A.L. Ward, R. Dayvault, and S.R. Waichler, et al. 2011. "Variably Saturated Flow and Multicomponent Biogeochemical Reactive Transport Modeling of a Uranium Bioremediation Field Experiment." Journal of Contaminant Hydrology 126, no. 3-4:271-290. PNNL-SA-76394. doi:10.1016/j.jconhyd.2011.09.002


  • Fang Y., S.B. Yabusaki, S.J. Morrison, J.E. Amonette, and P.E. Long. 2009. "Multicomponent reactive transport modeling of uranium bioremediation field experiments." Geochimica et Cosmochimica Acta 73, no. 20:6029-6051. PNNL-SA-62890.


  • Yabusaki S.B., Y. Fang, and S.R. Waichler. 2008. "Building Conceptual Models of Field-Scale Uranium Reactive Transport in a Dynamic Vadose Zone-Aquifer-River System." Water Resources Research 44. PNNL-SA-57625. doi:10.1029/2007WR006617


  • Cygan R., C.T. Stevens, R.W. Puls, S.B. Yabusaki, R.D. Wauchope, C.J. Mcgrath, and G.P. Curtis, et al. 2007. "Research Activities at U.S. Government Agencies in Subsurface Reactive Transport Modeling." Vadose Zone Journal 6, no. 4:805-822. PNNL-SA-57336. doi:10.2136/vzj2006.0091
  • Yabusaki S.B., Y. Fang, P.E. Long, C.T. Resch, A.D. Peacock, J. Komlos, and P.R. Jaffe, et al. 2007. "Uranium Removal from Groundwater via In Situ Biostimulation: Field-Scale Modeling of Transport and Biological Processes." Journal of Contaminant Hydrology 93, no. 2007:216-235. PNNL-SA-50626. doi:10.1016/j.jconhyd.2007.02.005


  • Fang Y., S.B. Yabusaki, and G. Yeh. 2006. "A General Simulator for Reaction-Based Biogeochemical Processes." Computers & Geosciences 32, no. 1:64-72. PNNL-SA-46059. doi:10.1016/j.cageo.2005.05.003
  • Long P.E., and S.B. Yabusaki. 2006. Performance Indicators for Uranium Bioremediation in the Subsurface: Basis and Assessment. PNNL-16385. Richland, WA: Pacific Northwest National Laboratory. Performance Indicators for Uranium Bioremediation in the Subsurface: Basis and Assessment
  • Ward A.L., M.E. Conrad, W.D. Daily, J.B. Fink, V.L. Freedman, G.W. Gee, and G.M. Hoversten, et al. 2006. Vadose Zone Transport Field Study: Summary Report. PNNL-15443. Richland, WA: Pacific Northwest National Laboratory. Vadose Zone Transport Field Study: Summary Report



  • Fang Y., S.B. Yabusaki, and G.T. Yeh. 2004. "A generic reaction-based biogeochemical simulator." In Proceedings of the 15th International Conference on Computational Methods in Water Resources (CMWR XV), June 13-17, 2004 Chapel Hill, NC, USA. Computational Methods in Water Resources, edited by C.T. Miller, M.W. Farthing, W.G. Gray, and G.F. Pinder, 1, 869-878. Amsterdam:Elsevier. PNNL-SA-40458.
  • Lichtner P.C., S.B. Yabusaki, K. Pruess, and C. Steefel. 2004. "Role of Competitive Cation Exchange on Chromatographic Displacement of Cesium in the Vadose Zone beneath the Hanford S/SX Tank Farm." Vadose Zone Journal 3, no. 1:203-219. PNNL-SA-43913.
  • Rosing M., J. Nieplocha, and S.B. Yabusaki. 2004. "Toward Efficient Compilation of User-Defined Extensible Fortran Directives." In Ninth International Workshop on High-Level Parallel Programming Models and Supportive Environments, Proceedings, 61-69. Los Alamitos:IEEE Computer Society. PNNL-SA-40520.
  • Um W., R.J. Serne, S.B. Yabusaki, V.L. Freedman, S.D. Samson, and K.L. Nagy. 2004. "The role of secondary mineral precipitates on radionuclide sequestration at the Hanford Site." In Proceedings of the eleventh international symposium Water-Rock Interaction, WRI-11, edited by RB Wanty and RR Seal, 1, 715-718. Leiden, New York:AA Balkema. PNNL-SA-48216.


  • Cantrell K.J., S.B. Yabusaki, M.H. Engelhard, A.V. Mitroshkov, and E.C. Thornton. 2003. "Oxidation of H2S by Iron Oxides in Unsaturated Conditions." Environmental Science & Technology 37, no. 10:2192-2199. PNNL-SA-37625.


  • Freshley M.D., A.L. Bunn, G.W. Gee, T.J. Gilmore, C.T. Kincaid, R.E. Peterson, and A.L. Ward, et al. 2002. Groundwater Protection Program Science and Technology Summary Description. PNNL-14092. Richland, WA: Pacific Northwest National Laboratory. Groundwater Protection Program Science and Technology Summary Description
  • Pruess K., S.B. Yabusaki, C.I. Steefel, and P.C. Lichtner. 2002. "Fluid Flow, Heat Transfer, and Solute Transport at Nuclear Waste Storage Tanks in the Hanford Vadose Zone." Vadose Zone Journal 1, no. 1:68-88. PNNL-SA-36933.
  • Yabusaki S.B. 2002. "Multiphase Fluid Flow and Multicomponent Reactive Transport at the Hanford SX Tank Farm." In Bridging the Gap between Measurement and Modelling in Heterogeneous Media: Proceedings of the International Groundwater Symposium, Lawrence Berkeley National Laboratory, Berkeley, California, March 25-28, 2002, edited by Angelos N. Findikakis, 456-461. Madrid:International Association of Hydraulic Engineering and Research (IAHR). PNNL-SA-35757.
  • Yabusaki S.B., and A.P. Gamerdinger. 2002. "Multi-region Transport and Competitive Ion Exchange in Partially Saturated Porous Media." In Computational Methods in Water Resources Proceedings of the XIVth International Conference on Computational Methods in Water Resources (CMWR XIV), June 23-28 2002, Delft, The Netherlands; Developments in Water Science, edited by S.M. Hassanizadeh, R.J. Schotting, et al., 47, 579-586. Amsterdam, :Elsevier. PNNL-SA-31826.
  • Yabusaki S.B., S.L. Bryant, S. Chen, G.I. Fann, G.P. Flach, W.G. Gray, and J.P. Holland, et al. 2002. Mechanistic Process Modeling for Subsurface Remediation. PNNL-14011. Richland, WA: Pacific Northwest National Laboratory. Mechanistic Process Modeling for Subsurface Remediation


  • Yabusaki S.B., K.J. Cantrell, and B.M. Sass. 2001. "Moffett Field Funnel and Gate TCE Treatment System: Interpretation of Field Performance using Reactive Transport Modeling." In 2001 International Containment & Remediation Technology Conference & Exhibition 10-13 June 2001, Proceedings. Tallahassee, Florida:Institute for International Cooperative Environmental Research, Florida State University. PNNL-SA-31827.
  • Yabusaki S.B., K.J. Cantrell, B. Sass, B. Sass, and C. Steefel. 2001. "Multicomponent reactive transport in an in situ zero-valent iron cell." Environmental Science & Technology 35, no. 7:1493-1503. PNNL-SA-31711.


  • Chilakapati A., M.D. Williams, S.B. Yabusaki, C.R. Cole, and J.E. Szecsody. 2000. "Optimal design of an in situ Fe(II) barrier: Transport limited reoxidation." Environmental Science & Technology 34, no. 24:5215-5221. PNNL-SA-31710.
  • Chilakapati A., S.B. Yabusaki, J.E. Szecsody, and W.D. Macevoy. 2000. "Groundwater flow, multicomponent transport and biogeochemistry: development and application of a coupled process model." Journal of Contaminant Hydrology 43, no. 3-4:303-325. PNNL-SA-31712.


  • Istok J.D., J.E. Amonette, C.R. Cole, J.S. Fruchter, M.D. Humphrey, J.E. Szecsody, and S.S. Teel, et al. 1999. "In Situ Redox Manipulation by Dithionite Injection: Intermediate-Scale Laboratory Experiments." Ground Water 37, no. 6:884-889. PNNL-SA-32702.
  • Rosing M., and S.B. Yabusaki. 1999. "A Programmable Preprocessor for Parallelizing Fortran-90." In Proceedings of the 1999 Conference on SuperComputing, Portland, Oregon. New York, New York:ACM Press. PNNL-SA-31828.


  • Yabusaki S.B., C.I. Steefel, and B. Wood. 1998. "Multidimensional, multicomponent, subsurface reactive transport in nonuniform velocity fields: code verification using an advective reactive streamtube approach." Journal of Contaminant Hydrology 30, no. 3-4:299-331. PNNL-SA-31829.


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