Relevant Experience Includes:
• Numerical modeling of saturated/unsaturated transport of PCE a site in Phoenix, Arizona. Three dimensional numerical simulations were conducted to predict the transport of PCE through the vadose zone and into the groundwater, and to evaluate the efficiency of potential treatment via AS and SVE.
• Numerical simulations in support of an experimental landfill site, under both aerobic and anaerobic operating conditions. The goal of this two-dimensional and three-dimensional modeling effort is to provide the ability to use gas composition data to control temperature in a landfill by optimizing the flow of air and moisture.
• Numerical simulations to evaluate design of biosparging and bioventing systems for cleanup of soils and groundwater impacted by liquid phase petroleum hydrocarbons an airport site in Phoenix, Arizona. Work has included use of numerical models to interpret field and preliminary pilot test data, and to evaluate a design for a full-scale site bioventing system, and to evaluate a design for a large scale biosparging test system for the site. The design is being evaluated in terms of projected air circulation and accompanying oxygen delivery and microbial activity.
• Development of a three-dimensional numerical simulator for multi-component, two-phase, non-isothermal, chemically or biologically reactive flow and transport in porous media, coupled to optimization software. Resulted in an improved, much faster version of TRACR3D (which he also developed), intended for a wide range of hydrological and environmental applications.
• Numerical modeling for a petroleum fuel spill at a site in California. Three dimensional numerical simulations were conducted to compare predicted movement of the fuel oil through the unsaturated zone to the water table, against field measurements, and to design an in situ bioremediation system.
• Development of a multi-species in situ bioremediation model to evaluate co-metabolic degradation of TCE in the unsaturated zone as well as below the water table, at the Savannah River site.
• Work associations prior to HGC have included the Earth and Environmental Sciences Division at Los Alamos National Laboratory, as well as Boeing Aerospace Co.
• Consultant to Union Oil of California.
• Consultant to Hydro Geo Chem, before joining the HGC staff.
PROFESSIONAL
PUBLICATIONS:
Knutson,
C. E., C. J. Werth, A. J. Valocchi, & B. J. Travis, 2004. Modeling
of biofilm morphology along a transverse mixing zone in porous media
at the pore scale, Comp.Methods Water Resources 15, 61-69.
Travis, B.
J., & G. Schubert. Hydrothermal convection in carbonaceous chondrite
parenT bodies, submitted to Earth & Planetary Science Letters.
Hier Majumder,
C. A., B. J. Travis, E. Belanger, G. Richard, A. P. Vincent, &
D. A. Yuen. Efficient Adjoint Sensitivity Analysis for Flow and
Transport in the Earth's Crust and Mantle, submitted to Geophysical
Journal Intrntl.
Bunge, H-P,
C. R. Hagelberg, and B. J. Travis, 2003. "Mantle circulation
models with variational data assimilation: inferring past mantle
flow and structure from plate motion histories and seismic tomography",
Geophys.J.Intl., 152, 280-301.
Dutrow, B.
L., B. J. Travis, C. W. Gable, and D. J. Henry, 2001. "Coupled
heat and silica transport associated with dike intrusion into sedimentary
rock: Effects on isograd location and permeability evolution",
J. Geochim et Cosmochim. Acta: 65(21) 3749-3767.
Weeber, P.
A., P. F. Andersen, B. J. Travis, D. C. Noffsinger, 2001. "Modeling
Biosparging and Natural Attenuation of Chlorinated Ethenes at SRS",
in Bioremediation and Phyto-remediation of Chlorinated and Recalcitrant
Compounds, Proc., Monterey, CA, May 22-25.
Travis, B.
J., 2000. "Using Fractal Functions to Capture Subgridscale
Dynamics in Porous Flow and Transport Numerical Models", Computational
Methods in Water Resources 13: 849-854.
Abdelouas,
A., W. Lutze, W. Gong, E.H. Nuttall, B.A. Strietelmeier, B.J. Travis,
2000. Biological reduction of uranium in groundwater and subsurface
soil. The Science of the Total Environment 250, 21-35.
Travis, B.
J., 1999. "A Modeling Study of Possible Nonlinear Interactions
Between Microbes and Protozoa in the Subsurface", Eos Trans.
AGU 80(46): Fall Meet. Suppl., Abs B52A-06.
Travis, B.J.,
1998."Numerical Simulation of In Situ Bioremediation",
pp. 91-98, in Computational Methods in Water Resources XII: Computational
Methods in Contamination and Remediation of Water Resources, V.N.
Burganos, G.P. Karatzas, A.C. Payatakes, C.A. Brebbia, W.G. Gray,
and G.F. Pinder, eds., Computational Mechanics Publications, Southampton,
UK.
Vanderberg-Twary,
L., K. Steenhoudt, B. Travis, J. L. Hanners, T. M. Foreman, and
J. R. Brainard, 1997. "Biodegradation of paint stripper solvents
in a modified gas lift op bioreactor", Biotechnology and Bioengineering
J., 55(1), 163-169.
Travis, B.J.,
and N.D. Rosenberg, 1997. "Modeling In Situ Bioremediation
of TCE at Savannah River: Effects of Product Toxicity and Microbial
Interactions on TCE Degradation", Environ. Sci. & Tech,
31(11), 3093-3102.
Bridwell, R.
J., and B. J. Travis, 1995. "Numerical Simulation of Acid Mine
Drainage (AMD) in a Fully-Coupled 3-D Ground Water Flow and Chemical
Transport Model:Part I, Field Example and Validation", Proceedings,
Conf. on Mining and the Environment, Sudbury, Ontario, Canada, May
28-June 1, 1995.
Birdsell, K.H.,
K. G. Eggert, and B.J. Travis, 1994. "Three Dimensional Simulations
of Radionuclide Transport at Yucca Mountain", Radioactive Waste
Management and Environmental Restoration, 19, 1-28.
Travis, B.J.,
K. Eggert, D. Grunau, S.Y. Chen, and G. Doolen 1993. "Lattice
Boltzmann Models for Flow in Porous Media", pp. 42-47, in Computing
at the Leading Edge:Research in the Energy Sciences, eds. A. A.
Mirin, and P. T. Van Dyke, National Energy Research Supercomputer
Center, Lawrence Livermore National Laboratory Report UCRL-TB-111084.
Keller, C.,
and B. Travis, 1993. "Evaluation of the Potential Utility of
Fluid Absorber Mapping of Contaminants". Proceedings, NGWA
Outdoor Action Conference, Las Vegas, NV.
Unsworth, M.
J., B. J. Travis, and A. D. Chave, 1993. "Electromagnetic induction
by a finite electric dipole source over a 2-D Earth", Geophysics
J., v. 58, No. 2, 198-214.
Chemburkar,
R. M., L. F. Brown, B. J. Travis, and B. A. Robinson, 1991. "Numerical
Determination of Temperature Profiles in Flowing Systems from Conversions
of Chemically Reacting Tracers", Chem. Engr. Sci., 46, 1349-1360.
Travis, B.
J., and K. H. Birdsell, 1991. "TRACRN 1.0: A Model of Flow
and Transport in Porous Media for the Yucca Mountain Project --Model
Description and User's Manual," Los Alamos National Laboratory
Report LA-11798-M, April, 1991.
Chen, S., K.
Diemer, G. D. Doolen, K. Eggert, C. Fu, S. Gutman, B. Travis, 1991.
"Lattice Gas Automata for Flow Through Porous Media",
Physica D, 47,72-84.
Birdsell, K.
H., P. G. Springer, L.F.Brown, G. A.Cederberg, B. J. Travis, and
A. E. Norris, 1988. "Modeling Tracer Diffusion in Fractured
and Unfractured, Unsaturated, Porous Media", J. Contaminant
Hydrology, 3, 145-170.
Travis, B.
J., and H. E. Nuttall, 1987. "Analysis of Colloid Transport,
" in Coupled Processes Associated with Nuclear Waste Repositories,
C. F. Tsang, Ed., Academic Press, 1987.
Travis, B.
J., and H. E. Nuttall, 1987. "Two-Dimensional Numerical Simulation
of Geochemical Transport in Yucca Mountain", Los Alamos Report
LA-10532-MS, 68 pages, Dec., 1987.
Cederberg,
G. A., L. E. Greenwade, and B. J. Travis, 1987. "The Transport
of Uranium and Technetium Through the Unsaturated Tuffs, Yucca Mountain,
Nevada," Materials Research Society, 84, 703-712.
Travis, B.
J., and H. E. Nuttall, 1985. "A Transport Code for Radiocolloid
Migration With an Assessment of a Low-Level Waste Site," in
Proceedings of the MRS Symposium on Scientific Basis for Nuclear
Waste Management, Vol. 44, p.969-976.
Perkins, B.,
G. L. DePoorter, and B. J. Travis, 1985. "Soil Water Flow Under
Saturated/Unsaturated Conditions --- Validation of the TRACR3D Code
in Three Experiments," Los Alamos National Laboratory Report
LA-10263-MS, January, 1985.
Travis, B.
J., A. H. Davis, T. D. Kunkle, R. G. Deupree, 1985. "KRAK --
A Computer Program for Two-Phase, Two Component Porous Flow and
Fracture Propagation," Los Alamos National Lab. Report LA-9703
(Rev.) April, 1985.
Travis, B.
J., and L. E. Greenwade, 1985. "A One-Dimensional Numerical
Model of Two-Phase Flow and Transport in Porous Media Using the
Dynamics of Contours Methodology," Los Alamos National Laboratory
Report LA-UR-85-3328.
Travis, B.
J., S. W. Hodson, H. E. Nuttall, T. L. Cook, and R. S. Rundberg,
1984. "Preliminary Estimates of Water Flow and Radionuclide
Transport in Yucca Mountain," Los Alamos National Laboratory
Report LA-UR-84-40 (Rev.).
Travis, B.
J., 1984. "TRACR3D: A Model of Flow and Transport in Porous/Fractured
Media", Los Alamos National Laboratory Report LA-9667-MS, 110
pp., May, 1984.
Travis, B.
J., P. J. Hommert and C. E. Tyner, 1983. "A Two Dimensional
Numerical Model of Underground Oil Shale Retorting", Proc.,
ASME-JSME Thermal Engineering Conf., 2, 43-54.
Travis, B.
J., 1983. "Comparison of the KRAK Model With Experimental Data,"
in Proceedings of the 2nd Symposium on Containment of Underground
Nuclear Explosions , Vol. 2, p.231-252.
Travis, B. J., A. H. Davis, 1980. "Calculation of Gas-Driven
Fracture Propagation in Rocks", Proc., 21st U. S. Symp. on
Rock Mechanics, Rolla, Mo., pp. 356-361.
Mr. Travis has over 40 years of experience working in various areas of computational physics. His areas of experience include multiphase flow and transport in porous media, inverse problems, sensitivity analysis applied to transport in porous media, cellular automata models of porous flow, in situ bioremediation modeling, acid mine drainage, numerical modeling of hydrothermal circulation associated with mid‑ocean ridges, convection under permafrost, mantle thermal convection, multi-component gas and heat flow for landfills, natural and controlled source electromagnetic sensing of geologic structures, rad/hydro with optical signatures, neural networks and computational neurobiology. Mr. Travis is Author/co‑author of more than 100 refereed papers and technical reports.