Timothy R. Ginn
Professor
Civil & Environmental Engineering
2001 Engineering III
(530) 752-1707
trginn@ucdavis.edu
Ph.D. 1988, Purdue University
Professor Ginn received his undergraduate degrees in Classics and Hydrology from the University of Virginia and his masters (1985) in water resource systems and doctorate (1988) in hydrogeology from Purdue University Civil Engineering . Before joining the UCD faculty in 1996, Dr. Ginn was employed as a senior research scientist at Battelle's Pacific Northwest National Laboratory PNNL in Richland, Washington.
He has been involved in quantitative research in reactive transport of multiphase, multicomponent mixtures with inorganic, organic, and biotic components in natural and engineered environments. Areas of specialization include upscaling multicomponent reactive transport in heterogeneous porous media by streamtube techniques, in situ bioremediation, subsurface bacterial transport and colloid filtration theory, modeling microbial and macrobial population dynamics and ecotoxicology, multiphase diffusive mass transfer, disinfection of particle-associated bacteria, estimation of groundwater recharge and age, and inverse problems.
Research Editing Students and Associates Teaching Publications Presentations
Projects:
US NSF: Metal Toxicity in Microbial Consortia: Response to Acid Mine Drainage at Lake Coeur d'Alene, Idaho (co-PI Brent Peyton, WSU), 2004-2007.
US NSF: Horizontal Gene Transfer in Subsurface Microbial Communities (co-PI John Cushman, Purdue), 2004-present.
CA EPA: Multimedia Risk Assessment for New Fuels in California: Review and Guidelines Development, 2003-2005
CA State Transportation Department (CALTRANS): Modeling Roadway Contaminant Fate and Transport During Infiltration in BMPs, 2003-present.
CA State Water Control Board: Compatibility and Permeability of Underground Storage Tank Materials to Ethanol-Blended Automotive Fuels, 2000-2001
UC WRC: Application of a New Model for Groundwater Age Distributions: Modeling and Isotopic Analysis of Artificial Recharge in the Rialto-Colton Basin, California (co-PI Linda Woolfenden, USGS), 1999-2002
US NSF: Penetration of Chemical Disinfectants into Particles Developed in Water Treatment: Impact on the Biological Quality of Post-Disifected Water (co-PI Frank Loge, WSU), 1999-2002
US DOE EMSP : Dynamics of Coupled Contaminant and Microbial Transport in Heterogeneous Porous Media, 1997-2000.
US DOE NABIR : The Influence of Heterogeneity and Growth on Microbial Transport in Saturated Porous Media, (co-PI E.M. Murphy, PNL), 1998-2001
US DOE NABIR : Data Analysis/Integration for Comparative Oxic/Anoxic Field Injections of Microbes.(co-PI T. Scheibe, PNL), 1998-2002
Professor Ginn is the Groundwater Section Editor of:
-
ASCE Journal of Hydrologic Engineeing
and is an associate editor of :
Current Students and Associates:
Glen Anderson, BSCE CEE, gmanderson@ucdavis.edu
Infiltration basin BMP modeling
Karen Lam Fat Cheong Him, MS CEE, foplam@ucdavis.edu
Modeling groundwater age distributions, Infiltration basin BMP modeling
Matt Diaz, MS CEE, matdiaz@ucdavis.edu
Fate and transport of metals from stormwater runoff in infiltration basin BMPs.
Hanieh Haeri, PhD CEE, hhaeri@ucdavis.edu
(co-advising w/Prof. Loge) Fisheries population dynamics and stressors
Elisabetta Lambertini, PhD CEE, elambertini@ucdavis.edu
(co-advising w/Prof. Loge) Environmental biotechnology, environmental stressors in populations, gene transfer and regulation in microbes.
Arash Massoudieh, PhD CEE, amassoudieh@ucdavis.edu
Modeling cohesive particulate suspensions with colloid-facilitated transport, radial diffusion, vertical infiltration of metals and organics in infiltration basin BMPs, kinetics of horizontal gene transfer in subsurface biotia, colloid filtration theory.
Kirk Nelson, Postdoctoral Associate CEE, knelson@ucdavis.edu
Colloid filtration theory, kinetics of horizontal gene transfer in porous media.
Mathias Perle, PhD LAWR, meperle@ucdavis.edu
(co-advising w/Prof. Fogg) Groundwater age transience and sampling by pumping.
Sevinc Sema Sengor, PhD CEE, sssengor@ucdavis.edu
Biogeochemical cycling of metals in multicomponent biotic/abiotic model of acid-mine impacted Lake Coeur d'Alene, Idaho.
Irina Tikhonova, Postdoctoral Associate CEE, itikhonova@ucdavis.edu
Mathematics of dose-structured population dynamics, analysis of Bay-Delta striped bass populations.
Graduated Students, Prior Associates:
Hakan Basagaoglu, Postdoctoral Associate 2000-2002, Radial diffusion modeling,
streamtube network models for solute transport, wastewater particle disinfection. Southwest Research Institute.
Eileen Belding, MS CEE, embelding@ucdavis.edu
Permeable reactive barriers with dynamic permeability and porosity
David Bendz, Postdoctoral Associate 2000- 2001, Surface complexation modeling
with distributed travel times in subsurface porous media. Swedish Geophysical
Institute, Sweden
Chris Brugato, MS CEE 1999, Anaerobic microbial consortium degradation kinetics. Westech Engineers, Inc., Salem OR
Esther Chung, MS CEE 2004, Storage and conveyance materials compatibility and
permeability to ethanol-based fuels. CH2MHill, Sacramento, CA
Kristin Curthoys, BSCE CEE, Geochemical modeling of lacustrine benthic sediments, Consulting, Citrus Heights, CA
Limor Geisler, MS, 2004, River hydraulics modeling. Davis, CA
Bryton Johnson, MS 2000, Modeling deep aquifer contaminants at Tooele Army Depot, Utah. US Army Corps of Engineers, Sacramento, CA
Ann Mathew, MS CEE 2006, Kinetics of microbial attachment/detachment in
saturated porous media. San Diego, CA
Kirk Nelson, MS CEE 2001, PhD CEE 2004, Colloid filtration theory. USBR, Sacramento, CA
Yuksel Onsoy, Ph.D. 2004, Nitrate fate and transport in the vadose zone.
Montgomery, Watson, Harza, Sacramento, CA
Mahbubur Rahman, Postdoctoral Associate 2004-2005, Stability analyses of delay-difference equations in population dynamics. Univ. N. FL Math Department
Uma Seeboonruang, PhD CEE 2002, Upscaling geochemical heterogeneity in
contaminant hydrology. King Mongkut University, Bangkok, Thailand
Rochelle Shang, PhD CEE 2002, Fieldscale application of streamtube ensemble
models for subsurface fate and transport. Research Associate, U. Hawaii
Lynette Shipsey, MS CEE, ljshipsey@ucdavis.edu
Bacterial chemotaxis in porous media
Michael C. Wademan, MS CEE 2000, Bacterial transport in porous media. Nolte & Associates, Sacramento, CA
Linda Woolfenden, PhD LAWR 2004, Deterministic simulation of the age of groundwater. USGS, Sacramento, CA
Teaching:
Pollution and Populations (FRS 001).
Freshman seminar on the interactions between chemical stressors and population dynamics
Probability and Statistics for Engineering Systems Analysis (ECI 114).
Introductory probability and statistical concepts for engineering students.
Groundwater Systems Design (ECI 144).
Introductory hydrogeology; well-flow systems; groundwater quality and contamination, management; intro. to groundwater modeling.
Water Quality Management (ECI 148A).
Basic concepts of water quality, water and wastewater treatment processes, and water quality management alternatives.
Advanced Hydrogeology: Flow (ECI 272A).
Continuum and mixture-mechanics of groundwater occurrence and motion via mass and momentum balances, hydraulics of groundwater, boundaries, and recharge; geologic properties controlling groundwater flow, heterogeneity and statistical properties of spatial random fields; introduction to stochastic hydrogeology.
Advanced Hydrogeology: Transport (ECI 272B).
Mechanics and governing equations for advective-dispersive/diffusive transport of solutes and suspensions in porous media; potential theory for two-dimensional transport in confined and unconfined aquifers; diffusive mass transfer with radial diffusion and effective multi-domain exchange models; deterministic and stochastic approaches to modeling transport; streamline and streamtube ensemble approaches to upscaling transport in heterogeneous aquifers.
Subsurface Reactive Transport (ECI 272C).
Multicomponent mixtures and their interactions during advective-dispersive transport in porous media; survey of chemical and microbiological reactions involving inorganic and organic components in natural aquifer materials; formulation of equilibrium and kinetic mass transformation models, and complex reaction networks; solution approaches via operator-splitting and DAE systems.
Recent Publications:
2006
Ginn, T. R., F. J. Loge, T. D. Scheibe, The ins and outs of noise in
population dynamics: environmental sources of variation in
anadramous fish populations, submitted to Computation in Science and Engineering.
Massoudieh, A., A. Mathew, T. R. Ginn, Column and
batch reactive transport experiment parameter estimation using a
genetic algorithm, submitted to Computers
in Geosciences.
Massoudieh, A., A. Mathew , E. Lambertini, K. E. Nelson, T. R. Ginn, Horizontal gene transfer on surfaces in natural porous media: conjugation and kinetics, in press Vadose Zone Journal.
Nelson, K. E. , A. Massoudieh, T.R. Ginn, E. Coli fate and transport in the Happel sphere-in-cell model, in press, Advances in Water Resources.
Collier T.K., M. R. Arkoosh, L.L. Johnson, T. R. Ginn, F. J. Loge,
The influence of chemical contaminants on disease ecology in Columbia
River Chinook salmon,
Marine Environmental Research,
62: S370-S370 Suppl. S, 2006.
Ginn, T. R. and F. J. Loge, Dose-structured population dynamics, Submitted to: Mathematical Biosciences, March 2005.
Ginn T. R., T. Camesano, T. D. Scheibe, K. E. Nelson, T. P. Clement,
B. D. Wood, Microbial Transport in the Subsurface, in press, Encyclopedia of Hydrological
Sciences, Edited by D. McKnight, John Wiley & Sons
Publishing, New York, NY.
2005-2004
Loge, F. J., M. R. Arkoosh, T. R. Ginn, L. L. Johnson, T. K. Collier, Impact of Environmental Stressors on the Dynamics of Disease Transmission, Environmental Science and Technology, 39 (18): 7329-7336 Sep. 15 2005.
Seeboonruang, U., and T. R. Ginn, Upscaling heterogeneity in aquifer reactivity via exposure-time concept: forward model, Journal of Contaminant Hydrology, 84 (3-4): 127-154, 2006.
Seeboonruang, U., and T. R. Ginn, Upscaling heterogeneity in aquifer reactivity via exposure-time concept: inverse model, Journal of Contaminant Hydrology, 84 (3-4): 155-177, 2006.
Bendz, D., N. A. Paxeus, T. R. Ginn, F. J. Loge, Occurrence and fate of pharmaceutically active compounds in the environment, a case study: Höje River in Sweden: Journal of Hazardous Materials, 21 April 2005 122: 195-204.
Onsoy, Y., T. H. Harter, T. R. Ginn, W. Horwath, Spatial variability and transport of nitrate in a deep alluvial unsaturated zone, Vadose Zone Journal, 2005 4: 41-54.
Nelson, K. E. and T. R. Ginn, Colloid filtration theory and the Happel sphere-in-cell model revisited with direct numerical simulation, Langmuir, 21(6); 2173-2184, 2005, DOI: 10.1021/la048404i.
Nakajima, H., B. Kutter, T.R. Ginn, M. A. Marino, An experimental study of LNAPL lens formation using a centrifuge, Proc. 16th Intl. Conf. Soil Mechanics and Geotechnical Engineering., 2005, 12-16 September in Osaka, Japan.
Basagaoglu H., T. R. Ginn, and B. J. McCoy, Radial pore diffusion with nonuniform intraparticle porosities, ASCE Journal of Environmental Engineering, 130(10): 1170-1179, 2004, October.
Ginn, T. R., On the application of stochastic approaches in hydrogeology, Stochastic Environmental Research and Risk Assessment, 18(4): 282-284, 2004 August.
Ginn, T. R., F. J. Loge, M. Arkoosh, Population balance
modeling of dose in environmental mixtures, Proceedings of the XVth
International Conference on Computational Methods in Water Resources
(CMWR XV), June 13–17, 2004, Chapel Hill, NC, USA, Volume 1, Edited by
C. T. Miller, M. W. Farthing, W. G. Gray, G. F. Pinder, pages 839-847.
2003-2002
Ruppe, L. M. and T. R. Ginn, Groundwater Quality, in Encyclopedia of Water Science, pages 389-391, July 28, 2003, DOI 10.1081/E-EWS-120010304.
Camesano, T. A., N. L. Abu-Lail, B. S. Arora, L. Abu-Lail, J. M. Pouliot, C. H. Bell, K. E. Nelson, T. R. Ginn, Role of extracellular polysaccharides in bacterial adhesion, Abstracts of Papers of the American Chemical Society, 225: U798-U798 15 Part 1, 2003 March.
Basagaoglu H., E. E. Chung, D. Gandhi, K. M. Scow, B. J. McCoy, T. R. Ginn, Rate parameters for MTBE degradation via a radial diffusion model, ASCE Journal of Environmental Engineering, 129(6):565-570, 2003 Jun.
Ginn, T. R., B. D. Wood, K. Nelson, T. D. Scheibe, E.
M. Murphy, and T. P. Clement, Processes in Microbial Transport in
the Natural Subsurface, Advances in Water Research,25(8-12):1017-1042,
2002.
Basagaoglu, H., McCoy, B.J., Ginn, T. R., Loge, F.J., and Dietrich,
J.P. A Diffusion Limited Sorption Kinetics Model Involving Multiple
Identical or Non-Identical Particles, Advances in Water Resources
25(7):755-772, 2002 .
Dietrich, J. P., H. Basagaoglu, F. J. Loge, T. R. Ginn, Preliminary Assessment of Transport Processes Influencing the Penetration of Chlorine Into Wastewater Particles and the Subsequent Inactivation of Particle-Associated Organisms, Water Research, 37(1):139-149, 2003.
Ginn, T. R., Streamtube-ensemble techniques for nonlinear multicomponent reactive transport in heterogeneous media, in R. Govindaraju (ed.) Stochastic Methods in Subsurface Contaminant Hydrology, ASCE Press, in press.
Basagaoglu H., E. E. Chung, D. Gandhi, K. M. Scow, B. J. McCoy, T. R. Ginn, Rate parameters for MTBE degradation via a radial diffusion model, Journal of Environmental Engineering., 129(6):565-570, 2003 Jun.
Basagaoglu, H., T. R. Ginn, B. J. McCoy, Formulation of a soil-pesticide transport model based on a compartmental approach, Journal of Contaminant Hydrology, 56: 1-24, 2002.
Basagaoglu, H., T. R. Ginn, B. J. McCoy, Comment on "Model coupling intra particle diffusion/sorption, nonlinear sorption, and biodegradatin process" by HK Karapanagioti, CM Gossard, KA Strevett, RL Kolar, and DA Sabatini, Journal of Contaminant Hydrology, 57: 303-310 2002.
Basagaoglu, H., T. R. Ginn, C. T. Green, and B. J. McCoy, Transport in heterogeneous media: Tracer dynamics in complex flow networks, 48:1122-1132. American Institute of Chemical Engineers Journal , 2002.
Ginn, T. R., A travel-time approach to effects of size exclusion on colloid transport in porous media, 10.1029/2001WR000865, Water Resources Research , 2002.
2001-1999
Loge, F. J., R. W. Emerick, T.
R. Ginn, and J. L. Darby, Association of coliform bacteria
with wastewater particles: Impact of operational parameters of the
activated sludge process, Water Research, 36(N1):41-48, 2001.
Nelson, K. E., and T. R. Ginn, Theoretical investigation of bacterial chemotaxis in porous media, Langmuir, 17:5635-5645, 2001.
Ginn, T. R. Stochastic-convective transport with nonlinear reactions and mixing: Finite streamtube ensemble formulation for multicomponent reaction systems with intra-streamtube dispersion, J. Contaminant Hydrology, 47:1-28, 2001.
Ginn, T. R., E. M. Murphy, A. Chilakapati, U.
Seeboonruang, Stochastic-convective transport with nonlinear reactions
and mixing: Application to intermediate-scale experiments in aerobic
biodegradation in saturated porous media, J. Contaminant Hydrology,
48:121-149, 2001.
Cushman, J. H. and T. R. Ginn, The fractional ADE is a classical mass balance with convoution-fickian flux, Water Resources Research 36(12):3763-3766, 2000.
Basagaoglu, H., T. R. Ginn, B. J. McCoy, M. A. Marino, A linear driving force approximation to a radial diffusive model, Am. Inst. Chem. Eng. J., 46(10):2097-2105, 2000.
Emerick, R. W., F. J. Loge, T. R. Ginn, and J. L. Darby. Modeling the Inactivation of particle-associated coliform bacteria, Water Environment Research 72(4):432-438, 2000.
Murphy, E. M. and T. R. Ginn. Modeling microbial processes in porous media, Hydrogeology J., 8(1):142-158, 2000.
Ginn, T.R. On the distribution of multi-component mixtures over generalized exposure-time in subsurface flow and reactive transport: Theory and formulations for residence-time dependent sorption/desorption with memory, Water Resources Research , 36:2885-2894, 2000.
Ginn, T.R. On the distribution of multi-component mixtures over generalized exposure-time in subsurface flow and reactive transport: Batch and column applications involving residence-time distributions and non-Markovian reaction kinetics, Water Resources Research, 36:2895-2904, 2000.
Ginn, T.R. On the distribution of generalized
exposure-time in groundwater flow and reactive transport: Foundations;
formulations for groundwater age, geochemical heterogeneity, and
biodegradation, Water Resources Research, 35(5):1395-1408,
1999.
LaViolette, R. A., M. E. Watwood, T. R. Ginn, and D. L. Stoner, Spatial disorder and degradation kinetics in intrinsic biodegradation schemes, J. Physical Chem A, 103(23): 4480-4484, 1999.
1998-1995
Murphy, E. M., T. R. Ginn, A. Chilakapati, T. Resch, J. Phillips, T. Wietsma, and C. M. Spadoni. The Influence of Physical Heterogeneity on Microbial Degradation and Distribution in Porous Media, Water Resources Research, 33:1087-1104, 1997.
DeFlaun M.F., C.J. Murray, W. Holben, T. Scheibe, A. Mills, T. R. Ginn, T. Griffin, E. Majer, and J.L. Wilson. Preliminary observations on bacterial transport in a coastal plain aquifer. 20:473-487, FEMS Microbiological Reviews, 1997.
Ginn, T. R., and E. M. Murphy. Generalized chloride mass balance: Forward and inverse solutions for 1-dimensional tracer convection under transient flux, Water Resources Research, 33:2065 2080, 1997.
Murphy, E. M., T. R. Ginn, and J. L. Phillips. Geochemical estimates of recharge in the Pasco Basin: Evaluation of the chloride mass-balance technique, Water Resources Research, 32:2853-2868, 1996.
Simmons, C. S., T. R. Ginn, and B. D. Wood. Stochastic-Convective Transport with Nonlinear Reaction: 1, Mathematical Framework. Water Resources Research, 31:2675-2688, 1995.
Ginn, T. R., C. S. Simmons, and B. D. Wood. Stochastic-Convective Transport with Nonlinear Reaction: 2, Biodegradation with Microbial Growth. Water Resources Research, 31:2689-2700, 1995.
Wood, B.D., T.R. Ginn, and C. N. Dawson. Effects of Microbial Lag in Contaminant Transport and Biodegradation Modeling. Water Resources Research, 31:553-563, 1995.
Chilakapati A, Ginn T, Szecsody J. An analysis of
complex reaction networks in groundwater modeling Water Resources Research, 34 (7):
1767-1780 JUL 1998.
Prior to 1995
Cushman, J.H., X. Hu, and T.R. Ginn. Nonequilibrium Statistical Mechanics of Preasymptotic Dispersion. J. Statistical Physics, 75:859-878, 1994.
Cushman, J.H. and T.R. Ginn. Non-Local Dispersion in Media with Continuously Evolving Scales of Heterogeneity. Transport in Porous Media, 13:123-138, 1993.
Cushman, J.H. and T.R. Ginn. On Dispersion in Fractal Porous Media. Water Resources Research, 29:3513-3515, 1993.
Ginn, T. R., and J. H. Cushman. A Continuous - Time Inverse Operator for Groundwater and Contaminant Transport Modeling: II, Model Identifiability. Water Resources Research, 28:539-549, 1992.
Ginn, T. R., J. H. Cushman, and M. H. Houck. A Continuous - Time Inverse Operator for Groundwater and Contaminant Transport Modeling I, Deterministic Case, Water Resources Research, 26:241-252, 1990.
Ginn, T. R., and J. H. Cushman, Inverse methods for subsurface flow- a critical review of stochastic techniques, Stoch. Hydrology and Hydraulics 4(1):1-26, 1990.
Ginn, T. R., and M. H. Houck. 1989. Calibration of an Objective Function for Optimization of Real-Time Reservoir Operations. Water Resources Research, 25:591-604, 1989.
Cosby, B. J., R. B. Clapp, G. M. Hornberger, and T. R. Ginn. A Statistical Exploration into the Relationships of Soil Moisture Characteristics to the Physical Properties of Soils. Water Resources Research, 20:682-690, 1984.