Northwestern University

Civil & Environmental Engineering

Click here to download my curriculum vitae Contact Information: Department of Civil and Environmental Engineering Northwestern University 2145 Sheridan Road, Evanston IL 60208-3109 phone: 847-491-9902 email: a-packman@northwestern.edu

Personal Information:

Birth Date: September 19, 1969
Birth Place: St. Louis, Missouri
Citizenship: USA

Education:

Ph.D. Environmental Engineering and Science, with Minor in Geology California Institute of Technology, Pasadena, California		May, 1997
M.S. Environmental Engineering and Science California Institute of Technology, Pasadena, California		June, 1992
B.S. Mechanical Engineering, with Minor in History, cum laude Washington University, St. Louis, Missouri		June, 1991

Post-Graduate Training:

Microbial Pathogenesis, Northwestern Feinberg School of Medicine

Mar.- Oct., 2007

Experience:

Northwestern University, Dept. of Civil and Environmental Engineering
Associate Professor		Sept. 2004 - present
Assistant Professor		Sept. 2000 - Aug. 2003
Drexel University, Dept. of Civil and Architectural Engineering
Assistant Professor		Nov. 1997 - Aug. 2000
California Institute of Technology, Dept. of Environmental Engineering and Science
Graduate Research and Teaching Assistant		Sept. 1994 - Sept. 1997
Office of Naval Research Fellow (DOD-NDSEG)		Sept. 1991 - Aug. 1994
McDonnell Douglas Corporation
Engineering Co-op (alternating terms)		1987 - 1991

Visiting and Affiliate Appointments:

Visiting Professor, Pontificia Universidad Católica de Chile		Feb. - Apr., 2008
Visiting Scientist, NIWA Christchurch, New Zealand		Jan. - Mar. 2007
Visiting Professor, Swedish University for Agricultural Sciences (SLU)		Aug. - Sept., 2002 - 2003
Visiting Professor, Uppsala University, Sweden		Aug. - Sept., 2001
Research Associate, Philadelphia Academy of Natural Sciences		1999 - 2000

Honors and Awards:

ASCE Huber Research Prize		2008
Northwestern Murphy Institute Faculty Fellow		2007-2008
NIH Career Award (K25)		2006
McCormick Excellence Award, Northwestern University		2006
Searle Junior Teaching Fellow, Northwestern University		2001-2002
NSF Career Award		1999
Department of Defense Graduate Fellowship (through ONR)		1991-1994
Myers Fellowship (full tuition, four year), Washington University		1987-1991
Elected to Tau Beta Pi and Pi Tau Sigma engineering honor societies		1990

Professional Activity and Service:

Professional Affiliations

American Society of Civil Engineers American Geophysical Union American Society for Microbiology

International Association of Hydraulic Engineering & Research International Association for Sediment Water Science North American Benthological Society

Professional Services

Editorships:

Water Resources Research, Associate Editor (1999 - present)

International Journal of Sediment Research, Editorial Board (2003 - present)

Society Leadership:

International Association for Sediment Water Science, Board of Directors (2005 - present)

Organization of Technical Conferences and Workshops:

NSF Hydrologic Synthesis Meeting, Water Cycle Dynamics in a Changing Environment, Evanston, Feb., 2008.

AGU Spring Meeting / NABS Joint Assembly, New Orleans, May 2005.

Participation in Technical Committees:

ASCE, Task Committee on Pathogens in Wet Weather Flows (2008 - present)

ASCE, Task Committee on Contaminated Sediments, Chair (2002 - 2005)

CUAHSI, Northwestern Representative (2002 - present)

ASCE, Environmental Hydraulics Committee (2001 - present)

ASCE, Sedimentation Committee (2000 - present)

AGU, Water Quality Committee (1999 - present)

Conference Sessions Chaired and Organized:

AGU Fall Meeting, 2007, Union Session: Scaling and nonlinear variability (chaotic and fractal behavior) in geophysical, geochemical and geobiological processes

AGU / NABS Joint Assembly, 2005, Microbial Transport Processes in the Environment: Cells and Solutes

AGU / NABS Joint Assembly, 2005, Biogeosciences General Contributions

EGU General Assembly, 2005, Response of Aquatic Ecosystems to Physical, Chemical, and Biological Disturbance

AGU Fall Meeting, 2004, Flow and Solute Transport in Coupled Surface-Water/Groundwater Systems

ASCE/EWRI World Water and Environmental Resources Congress, 2003, Contaminated Sediments

AGU Fall Meeting, 2002, Science, Politics, and Watershed Management

IASWS, 9th International Symposium on the Interactions Between Sediments and Water, 2002, Nutrient Dynamics

AGU Fall Meeting, 2001, Influence of Hyporheic and Riparian Zones on Solute Transport and Biogeochemical Reactions

AGU Spring Meeting, 2000, Water Quality of Hydrologic Systems

AGU Fall Meeting, 1999, Recent Advances in Interaction of Groundwater and Surface Water

Participation in Technical Panels, Invited Workshops, and External Program Reviews:

NSF Hydrologic Synthesis Summer Institute, Faculty Mentor (2009)

EPA STAR program, Consequences of Global Change for Water Quality, Proposal Review Panel (2008)

EU REACH program, Committee for establishment of a sediment standard for nickel in European freshwater systems, Technical Expert (2008).

UK NERC/Environment Agency, Hyporheic Zone Network, Invited International Panelist (2007 - present)

NSF/NCED, Workshop on Stochastic Transport and Emergent Scaling in Earth Surface Processes, Invited Panelist (2007)

NSF, Hydrologic Synthesis Team Member (2007 - present)

Universidad de Chile and Pontificia Universidad CatCatólicalica de Chile, Colleges of Engineering, Joint External Program Review Committee (Mecesup) (2007)

USDA/FDA/UC, Coordinated Management of Water Quality Protection & Food Safety, Invited Panelist (2007)

DOE, Environmental Remediation Science Program, Proposal Review Panel (2006)

UNESCO International Hydrological Programme, Groundwater-Surface Water Interactions and Nutrient Behavior in River Corridors, Invited Panelist (2005)

NSF/DOE Workshop, Water: Challenges at the Intersection of Human and Natural Systems, Invited Panelist (2004)

Austrian Academy of Sciences, Kerner von Marilaun Workshop, Long Term Development in Fluvial Ecology, Invited Panelist (2003)

Department of Energy, Office of Science, Savannah River Site Workshop, Invited Panelist (2003)

NSF, Biocomplexity Proposal Review Panel (2000)

DuPont Workshop, Modeling and Management of Emerging Environmental Issues, Invited Panelist (2000)

Review Activity:

Proposal Reviews: NSF; DOE; EPA: FONDECYT (Chilean NSF); University di Padova, Albo dei revisori (external review panel); Consulate General of France, Chateaubriand Fellowship review; US-Israeli Bi-national Science Foundation.

Manuscript Reviews: Limnology & Oceanography, Environmental Fluid Mechanics, Geophysical Research Letters, Environmental Science & Technology, Biogeosciences, Water Resources Research, J. Hydraulic Engineering, J. Environmental Engineering, J. Hydraulic Research, J. Hydrologic Engineering, Applied and Environmental Microbiology, Hydrobiologia, Int. J. Sediment Research, Restoration Ecology, Hydrological Processes, Advances in Limnology, Sedimentary Geology, J. Infrastructure Systems, Marine Ecology Progress Series, Marine and Freshwater Research, ASCE Publications, Univ. of California Publications.

Research

Research Interests:

My research focuses on environmental and microbial transport processes, with particular emphasis on understanding the basic processes that control interfacial transport in aquatic systems and the coupling of physical transport processes with biological and biogeochemical processes. I seek to define critical structure-transport-transformation relationships in dynamic natural environments such as rivers and in surface-attached microbial communities (biofilms). My work is highly collaborative and encompasses basic fluid mechanics, particle transport and morphodynamics, aquatic and surface chemistry, and microbiology. Important applications include contaminant transport and water quality, microbial habitat conditions and benthic microbial ecology, nutrient and carbon cycling, ecosystem degradation and restoration, control of biofilm-based infections and biofilm-resident pathogens in building systems, and the transmission of waterborne disease.

Current Research Projects:

Pathogen survival in transport-limited environments, NIH/NIAID K25AI62977, A.I. Packman, $719,051, 2006 - 2011.

Coupling between pore water fluxes, structural heterogeneity, and biogeochemical processes controls contaminant mobility, bioavailability, and toxicity in sediments, A.I. Packman, J.-F. Gaillard, and G.A. Burton, $726,166, SERDP, 2010 - 2013 (recommended for funding; not yet awarded).

Linking scales of geomorphology and solute transport in river corridors, A.I. Packman, J.W. Harvey, and D.J. Jerolmack, NSF EAR-0810270, Collaborative research with total project budget $564,086, 2008 - 2011.

Synchrotron imaging of crystalline biofilms in urinary catheters, A.I. Packman and J.-F. Gaillard, NIH/NIAID R21AI079640, $445,792, 2009 - 2011.

Metabolic heterogeneity and antibiotic susceptibility in biofilms, A.I. Packman, D. Chopp, and M. Parsek, R56AI081983, $378,453, 2009 - 2010.

Modeling reactive transport in deformable porous media across scales, J.E. Andrade, N.E. Blair, J.-F. Gaillard, A.I. Packman, J.W. Rudnicki, and I. Szleifer, The Initiative for Sustainability and Energy at Northwestern, $45,000, 2009 - 2010.

Seston contributions to metabolism across longitudinal ecosystems (SCALE) - Dynamics of organic particles in stream ecosystems, J.D. Newbold, A.K. Aufdenkampe, L.A. Kaplan, A.I. Packman, & J. McNair, NSF DEB-0543526 and -0543442, Collaborative research with total project budget $650,000, 2006 - 2010.

Reducing human health risks from animal agriculture: Comparative analysis of the transmission of multiple zoonotic pathogens in mixed-use agricultural systems, T. Harter, E.R. Atwill, A.I. Packman, & S. Wuertz, USDA NRI, $399,954, 2008 - 2010.

Assessing and managing biofilms in drinking water distribution systems, M. Hausner and A.I. Packman, AwwaRF, $225,000, 2008 - 2010.

Completed Research Projects:

SGER: Observing the development of biofilm structure under controlled complex flow patterns, A.I. Packman, NSF CBET-0730976, $128,822, 2007 - 2009.

Association of Cryptosporidium parvum with sedimentary biofilms: Implications for natural attenuation during transport in watersheds, USDA CSREES-2004-00854, $475,170, A.I. Packman, T. Harter, & E.R. Atwill, 2004 - 2009.

Fine particle migration and solute fluxes in sediment beds: Analysis of sediment structural dynamics using 3D micro-tomography, NSF EAR-0310657, A.I. Packman &J.-F. Gaillard, $235,592, 2003 - 2008.

Application of x-ray difference microtomography to characterize arsenic-rich sediments in the Río Loa system, Atacama Desert, Northern Chile, Supplement to NSF EAR-0310657, A.I. Packman & J.-F. Gaillard, $50,000, 2007 - 2008.

Prediction of hyporheic exchange and solute transport dynamics in a headwater tributary of the Illinois and Mississippi River systems, NSF EAR-0408744, $359,983, A.I. Packman & J.W. Harvey. 2004 - 2008.

Community-based urban environmental issues, K.A. Gray, A.I. Packman, & J.-F. Gaillard, Dept. of Education, GAANN P200A030154, $409,504, 2003 - 2007.

An evaluation of the efficacy of fill removal, cleaning, and disinfection in controlling Legionella populations in cooling tower systems, N. Cianciotto & A.I. Packman, ASHRAE 1307-TRP, $164,242, 2005 - 2006

Engineering an artificial substrate system to accelerate the denitrification of agricultural runoff by naturally-occurring periphyton, USDA CSREES-2002-01199, K.A. Gray & A.I. Packman, $324,000, 2002 - 2006.

Natural attenuation of Cryptosporidium parvum during transport in watersheds, USDA NRI 2001-01056, $320,000, T. Harter, A.I. Packman, E.R. Atwill, & C.F. Brush, 2001 - 2005.

CAREER: A career development plan for the study of stream-subsurface interactions, NSF BES-9875784 and BES-0196368, $402,965, A.I. Packman, 1999 - 2005.

Hydrologic and solute transport analyses to support the Des Plaines Wetland Demonstration Study, Wetlands Research Inc., $20,000, A.I. Packman, 2004.

Documenting the effects of urban sprawl on a model watershed in Philadelphia, Pennsylvania, NSF/EPA/USDA Water and Watersheds, NSF EAR-0001884, $705,000, C. Welty, S. Kilham, A.I. Packman, & R.J. Brulle, 2000 - 2004.

Solute transport in armored and sorted streambeds, National Center for Earth-Surface Dynamics, International Cooperative Research Program, A.I. Packman & A. Marion, $20,554, 2003.

The role of physicochemical processes in sediment transport by turbidity currents, ONR Marine Geosciences, N00014-01-1-0955, $41,222, A.I. Packman, 2001 - 2002.

Impact of stream-subsurface exchange on fine sediment dynamics in streams, Pennsylvania Water Resources Research Center (USGS), $39,428, A.I. Packman, 1999 - 2001.

Mobilization and downstream transport of Cryptosporidium by storm flows, Philadelphia Water Department, $35,000, A.I. Packman, 2000 -2000.

U.S.-European Union Planning Visit: Investigation of surface/subsurface exchange processes in meandering streams, NSF INT-9813415, $3,053, A.I. Packman, Feb. 1999.

Proposals Pending:

Metabolic heterogeneity and antibiotic susceptibility in biofilms, A.I. Packman, D. Chopp, and M. Parsek, $1,851,594, NIH/NIAID R01, 2009-2014 (first year funded using the R56 mechanism).

NSF Engineering Research Center for nanotechnology for concrete sustainability, P.R. Selvam and many others, NSF EEC program, $18,500,000, 2010 - 2015.

Publications:

Cover Articles, Publication Highlights and Awards

Cover Image, Geophysical Research Letters, "Tomographic images of colloidal zirconia deposits within a porous medium composed of glass beads," Vol. 34, No. 18, 2007.

Editor's Highlight, Geophysical Research Letters, "Particle deposition and clogging: Microstudies of colloids moving through pore spaces," Vol. 34, No. 18, 2007.

Editor's Highlight, Geophysical Research Letters, "Fractal topography and groundwater flow," Vol. 34, No. 7, 2007.

Cover Image, Applied and Environmental Microbiology, "Retention of Cryptosporidium parvum oocysts in a Pseudomonas aeruginosa biofilm resolved by confocal microscopy," Vol. 72, No. 9, 2006.

Editor's Highlight, Geophysical Research Letters, "Using surface topography to predict groundwater flow patterns," Vol. 33, No. 7, 2006.

Work Featured in Popular Press and Congressional Briefs

El Mercurio (Santiago, Chile), "El arsénico y el boro no dejan florecer al Valle de Lluta," (Arsenic and boron prevent the Lluta River valley from blooming), July 21, 2009.

McCormick Magazine, "To Chile's deserts, mountains, and snow to see how arsenic flows," E. Ashford, Spring 2009.

American Geophysical Union, Image of the week, "Micro-scale imaging of particle deposits helps to predict the evolution of sedimentary systems," April, 2008.

The Journal of Young Investigators, "Carbon cycle in the rivers; a drop from the ocean," M. Ziadh, Vol. 3, No. 18, March, 2008.

The New Nation, "Studying rivers for clues to global carbon cycle," T. Munna, February 25, 2008.

AboutMyPlanet.com, "Rivers - The Missing Pieces of Global Carbon Cycle," P. Sequeira, February 23, 2008.

New Energy and Fuel, "A look at another carbon cycle sink," February 13, 2008

Science Daily, "Rivers form larger component of global carbon cycling than previously thought", February 12, 2008.

The Assam Chronicle, "Rivers contribute much more to global carbon cycling than previously believed," February 11, 2008.

Terra Daily, "Studying Rivers For Clues To Global Carbon Cycle," February 11, 2008.

Asia News International (ANI news service), "Carbon processing in rivers is a bigger component of global carbon cycling than previously believed" February 10, 2008.

SooToday.com, "What rivers can teach us about climate change," R. McGee, February 9, 2008

Digital Journal, "Rivers Studied for Clues to Global Carbon Cycle," B. Ewing, February 8, 2008.

Bio-Medicine, "Studying rivers for clues to global carbon cycle," February 8, 2008.

Chicago Tribune, "Great Lakes key front in water wars," T. Jones, October 28, 2007 (Front page).

Northwestern Centerpiece, Rear cover image, "Imaging of colloidal deposits in granular porous media by x-ray difference micro-tomography." Vol. 7, No. 1, Fall 2007.

Congressional Brief, "Migration of zoonotic pathogens in aquatic systems," USDA, March, 2007.

McCormick by Design, "Legionnaire's Disease: McCormick, Feinberg join the fight," Fall 2006.

Book Chapters:

1. Medina, M.A., Doneker, R.L., Grosso, N., Johns, D.M., Lung, W., Mohsen, M.F.N., Packman, A.I., and Roberts, P.J. 2004, Surface water-ground water interactions and modeling applications. In Contaminated Ground Water and Sediment: Modeling for Management and Remediation, C.C. Chien, M.A. Medina, Jr., G.F.Pinder, D.D. Reible, B.E. Sleep; and C. Zheng (eds.), CRC Press, 1-62.

2. Packman, A.I., and Bencala, K.E. 2000, Modeling methods in the study of surface-subsurface hydrologic interactions, in Streams and Ground Waters, J.B. Jones and P.J. Mulholland (eds.), Academic Press, 45-80.

Papers in peer-reviewed journals:

1. Zhang, W., Sileika, T., Chen, C., Liu, Y., and Packman, A.I., 2009, A novel planar flow cell for studies of biofilm heterogeneity and flow-biofilm interactions, Applied and Environmental Microbiology, submitted.

2. Liu, Y., Zhang, W., Sileika, T., Warta, R., Cianciotto, N.P., and Packman, A.I., 2009, Disinfection of bacterial biofilms in cooling tower systems, Water Research, submitted.

3. Arnon, S., Marx, L.P., Searcy, K.E., and Packman, A.I., 2009, Effects of overlying velocity, particle size and biofilm growth on stream-subsurface exchange of particles, Hydrologic Processes, in press.

4. Chen, C., Lau, B. L. T., Gaillard, J.-F., and Packman, A.I., 2009, Temporal evolution of pore geometry, fluid flow, and solute transport resulting from colloid deposition, Water Resources Research, 45, W06416, doi:10.1029/2008WR007252

5. Chen, C., Packman, A. I., and Gaillard, J.-F., 2009, Using X-ray micro-tomography and pore-scale modeling to quantify sediment mixing and fluid flow in a developing streambed, Geophysical Research Letters, 36, L08403, doi:10.1029/2009GL037157

6. Liu, Y., Zhang, W., Sileika, T., Warta, R., Cianciotto, N.P., and Packman, A.I., 2009, Role of bacterial adhesion in the microbial ecology of biofilms in cooling tower systems, Biofouling, 25:3, 241-253, DOI: 10.1080/08927010802713414.

7. Chen, C., Packman, A. I., and Gaillard, J.-F. 2008, Pore-scale analysis of permeability reduction resulting from colloid deposition, Geophysical Research Letters, 35, L07404, DOI: 10.1029/2007GL033077.

8. Battin, T.J., Kaplan, L.A., Findlay, S., Hopkinson, C.S., Marti, E., Packman, A.I., Newbold, J.D., and Sabater, F., 2008, Biophysical controls on organic carbon fluxes in fluvial networks, Nature Geoscience, 1, 95-100, DOI: 10.1038/ngeo101.

9. Marion A., Packman, A.I., Zaramella, M., and Botticin, A., 2008, Hyporheic flow in stratified beds, Water Resources Research, 44, W09433, DOI: 10.1029/2007WR006079.

10. Cardenas, M.B., Harvey, J.W., Packman, A.I., and Scott, D.T., 2008, Ground-based thermography of fluvial systems at low and high discharge reveals potential complex thermal heterogeneity driven by flow variation and bioroughness, Hydrological Processes, 22(7), 980-986, DOI: 10.1002/hyp.6996.

11. Wörman, A., Packman, A.I., Marklund, L., Harvey, J.W., and Stone, S.H., 2007, Fractal topography and subsurface water flows from fluvial bedforms to the continental shield, Geophysical Research Letters, 34(7), L07402, DOI: 10.1029/2007GL029426 [Editor's highlighted article].

12. Boano, F., Packman, A.I., Cortis, A., Revelli, R., and Ridolfi, L., 2007, A continuous time random walk approach to the stream transport of solutes, Water Resources Research, 43, W10425, DOI: 10.1029/2007WR006062.

13. Gaillard, J.-F., Chen, C., Stonedahl, S.H., Lau, B.L.T., Keane, D.T, and Packman, A.I., 2007, Imaging of colloidal deposits in granular porous media by x-ray difference micro-tomography, Geophysical Research Letters, 34(18), L18404, DOI: 10.1029/2007GL030514 [Cover article and Editor's highlighted article].

14. Arnon, S., Gray, K.A., and Packman, A.I., 2007, Biophysicochemical process coupling controls nitrogen utilization by benthic biofilms, Limnology and Oceanography, 52(4), 2007, 1665-1671.

15. Arnon, S., Peterson, C.G., Gray, K.A., and Packman, A.I., 2007, Influence of flow conditions and system geometry on nitrate utilization by benthic biofilms: Implications for nutrient mitigation, Environmental Science & Technology, 41(23), 8142-8148, DOI: 10.1021/es0710048.

16. Ren, J., and Packman, A.I., 2007, Changes in fine sediment size distributions due to interactions with streambed sediments, Sedimentary Geology, 202, 529-537, DOI: 10.1016/j.sedgeo.2007.03.021.

17. Arnon, S., Packman, A.I., Peterson, C.G., and Gray, K.A., 2007, Effects of overlying velocity on periphyton structure and denitrification, JGR-Biogeosciences, 112, G01002, DOI: 10.1029/2006JG000235.

18. Ryan, R.J., Packman, A.I., and Kilham, S.S., 2007, Relating phosphorus uptake to changes in transient storage and streambed sediment characteristics in headwater tributaries of Valley Creek, an urbanizing watershed, Journal of Hydrology, 336(3-4), 444-457.

19. Searcy, K.E., Packman, A.I., Atwill, E.R., and Harter, T., 2006, Capture and retention of Cryptosporidium parvum oocysts by Pseudomonas aeruginosa biofilms, Applied and Environmental Microbiology, 72(9), DOI: 10.1128/AEM.00344-06, 6242-6247 [Cover article].

20. Cortis, A., Harter, T., Hou, L., Atwill, E.R., Packman, A.I., and Green, P.G., 2006, Transport of Cryptosporidium parvum in porous media: Long-term elution experiments and continuous time random walk filtration modeling, Water Resources Research, 42, W12S13, DOI: 10.1029/2006WR004897.

21. Packman, A.I., Marion, A., Zaramella, M., Chen, C., Gaillard, J-F, and Keane, D., 2006, Development of layered sediment structure and its effects on pore water transport and hyporheic exchange, Water, Air, and Soil Pollution: Focus, 6(5-6), DOI: 10.1007/s11267-006-9057-y.

22. Ryan, R.J., and Packman, A.I., 2006, Changes in streambed sediment characteristics and solute transport in the headwaters of Valley Creek, an urbanizing watershed, Journal of Hydrology, 323(1-4), DOI: 10.1016/j.jhydrol.2005.06.042, 74-91.

23. Searcy, K.E., Packman, A.I., Atwill, E.R., and Harter, T., 2006, Deposition of Cryptosporidium oocysts by stream-subsurface exchange, Applied and Environmental Microbiology, 72(3), 1810-1816.

24. Wörman, A., Packman, A.I., Marklund, L., Harvey, J.W., and Stone, S.H., 2006, Exact three-dimensional spectral solution to surface-groundwater interactions with arbitrary surface topography, Geophysical Research Letters, 33(7), L07402, DOI: 10.1029/2006GL025747 [Editor's highlighted article].

25. Zaramella, M., Marion, A. and Packman, A.I., 2006, Applicability of the Transient Storage Model to the hyporheic exchange of metals and colloids, Journal of Contaminant Hydrology, 84(1-2), 21-35.

26. Wörman, A., Kløve, B., Wachniew, P., Czuprynski, P., and Packman, A., 2005, Tracer test in Hobøl Creek, Norway, under different flow conditions, Acta Geophysica Polonica, 53(4), 517-526.

27. Rehg, K.J., Packman, A.I., and Ren, J. 2005, Effects of suspended sediment characteristics and bed sediment transport on streambed clogging, Hydrological Processes, 19(2), 413-427.

28. Searcy, K.E., Packman, A.I., Atwill, E.R., and Harter, T., 2005, Association of Cryptosporidium parvum with suspended particles: Impact on oocyst sedimentation, Applied and Environmental Microbiology, 71(2), 1072-1078.

29. Ren, J., and Packman, A.I., 2005, Coupled stream-subsurface exchange of colloidal hematite and dissolved zinc, copper and phosphate, Environmental Science & Technology, 39(17), 6387-6394.

30. Salehin, M., Packman, A.I., and M. Paradis, 2004, Hyporheic exchange with heterogeneous streambeds: Modeling and laboratory experiments, Water Resources Research, 40(11), W11504, DOI: 10.1029/2003WR002567.

31. Ren, J., and Packman, A.I., 2004, Stream-subsurface exchange of zinc in the presence of silica and kaolinite colloids, Environmental Science & Technology, 38(24), 6571-6581.

32. Packman, A.I., Salehin, M., and Zaramella, M. 2004, Hyporheic exchange with gravel beds: Basic hydrodynamic interactions and bedform-induced advective flows, Journal of Hydraulic Engineering, 130(7), 647-656.

33. Ren, J., and Packman, A.I. 2004, Modeling of simultaneous exchange of colloids and sorbing contaminants between streams and streambeds, Environmental Science & Technology, 38(1), DOI: 10.1021/es034852l, 2901-2911.

34. Packman, A.I., and Jerolmack, D. 2004, The role of physicochemical process in controlling sediment transport and deposition in turbidity currents, Marine Geology, 204(1-2), DOI: 10.1016/S0025-3227(03)00359-1, 1-9.

35. Ryan, R.J., Packman, A.I., and Welty, C. 2004, Estimation of solute transport and storage parameters in a stream with anthropogenically produced unsteady flow and industrial bromide input, Water Resources Research, 40(1), W01602, DOI: 10.1029/2003WR002458.

36. Packman, A.I., Battin, T.J., and Newbold, J.D. 2003, Coupling of hydrodynamical, biological, and geochemical processes in streambeds, Archives of Hydro-Engineering & Environmental Mechanics, 50(2), 107-123.

37. Salehin, M., Packman, A.I., and Wörman, A. 2003, Comparison of hyporheic exchange in vegetated and unvegetated reaches of a small agricultural stream in Sweden: Seasonal variation and anthropogenic manipulation, Advances in Water Resources, 26(9), 951-964.

38. Zaramella, M., Packman, A.I., and Marion, A. 2003, Application of the Transient Storage Model to analyze advective hyporheic exchange with deep and shallow sediment beds, Water Resources Research, 39(7), DOI:10.1029/2002WR001344.

39. Ren, J., and Packman, A.I. 2003, Stream-subsurface exchange, suspended sediment transport, and the coupled transport of colloids and contaminants in streambeds, International Journal of Sediment Research, 18(2), 199-207.

40. Packman, A.I., and Salehin, M. 2003, Relative roles of stream flow and sedimentary conditions in controlling hyporheic exchange, Hydrobiologia, 494, 291-297.

41. Marion, A., Zaramella, M., and Packman, A.I. 2003, Parameter estimation of the Transient Storage Model for stream-subsurface exchange, Journal of Environmental Engineering, 129(5), 456-463.

42. Packman, A.I, and MacKay, J.S. 2003, Interplay of stream-subsurface exchange, clay particle deposition, and stream bed evolution, Water Resources Research, 39(4), 1097, DOI:10.1029/2002WR001432.

43. Marion, A., Bellinello, M., Guymer, I., and Packman, A.I. 2002, Effect of bed form geometry on the penetration of passive solutes into a stream bed, Water Resources Research, 38(10), 1209, DOI:10.129/2001WR000264.

44. Ren, J., and Packman, A.I. 2002, Effects of particle size and background water composition on stream-subsurface exchange of colloids, Journal of Environmental Engineering, 128(7), 624-634.

45. Wörman, A., Packman, A.I., Johansson, H., and Jonsson, K. 2002, Effect of flow-induced exchange in hyporheic zones on longitudinal transport of solutes in streams and rivers, Water Resources Research, 38(1), 1001, DOI: 10.129/2001WR000769.

46. Ren, J., Packman, A.I., and Welty, C. 2001, Analysis of an observed relationship between colloid collision efficiency and mean collector grain size, Colloids and Surfaces (a), 191(1-2), 133-144.

47. Packman, A.I., and Brooks, N.H. 2001, Hyporheic exchange of solutes and colloids with moving bedforms, Water Resources Research, 37(10), 2591-2605.

48. Ren, J., Packman, A.I., and Welty, C. 2000, Correlation of colloid collision efficiency with hydraulic conductivity of silica sands, Water Resources Research, 36(9), 2493-2500.

49. Packman, A.I., Brooks, N.H., and Morgan, J.J. 2000, A physicochemical model for colloid exchange between a stream and a sand streambed with bed forms, Water Resources Research, 36(8), 2351-2361.

50. Packman, A.I., Brooks, N.H., and Morgan, J.J. 2000, Kaolinite exchange between a stream and streambed: Laboratory experiments and validation of a colloid transport model, Water Resources Research, 36(8), 2363-2372.

51. Packman, A.I., Brooks, N.H., and Morgan, J.J. 1997, Experimental techniques for laboratory investigation of clay colloid transport and filtration in a stream with a sand bed, Water, Air, and Soil Pollution, 99, 113-122.

52. Packman, A.I., and Brooks, N.H. 1995, Colloidal particle exchange between stream and stream bed in a laboratory flume, Marine and Freshwater Research, 46, 233-6.

Conference Proceedings and Other Publications:

1. Packman, A.I., Larned, S., Plew, D., and Vopel, K., 2008, Modification of river hydraulics by the invasive diatom Didymosphenia geminata, Proceedings of the ASCE/EWRI World Water and Environmental Resources Congress, Honolulu, May, 2008.

2. Stott, R., Davies-Colley, R., Nagels, J. and Packman, A., 2007, Flume studies of uptake of faecal microbes and turbidity in gravel streambeds, Proceedings of the 11th International IWA Conference on Diffuse Pollution, Brazil, August, 2007.

3. Matos, J.E.R., Welty, C., and Packman, A.I. 2003, Stream-groundwater interactions: The influence of aquifer heterogeneity and stream meandering on 2-D and 3-D hyporheic exchange flows, Proceedings of MODFLOW and More 2003: Understanding through Modeling, Golden, Colorado, Sept. 17-19, 2003.

4. Packman, A.I, and Ren, J. 2003, Multi-phase contaminant transport in sediment beds. Proceedings of the ASCE/EWRI World Water and Environmental Resources Congress, Philadelphia, June 22-26, 2003.

5. Packman, A.I., Battin, T.J., and Newbold, J.D. 2002, Challenges in Ecohydraulics: Biophysicochemical processes at the stream-subsurface interface. Proceedings of the 5th International Conference on Hydroscience and Engineering, Warsaw, Poland, Sept. 18-20, 2002.

6. Packman, A.I. 2001, Re-examination of the wash load concept: Role of physicochemical processes, Proceedings of the ASCE/EWRI World Water and Environmental Resources Congress, Orlando, May 20-24, 2001.

7. Jerolmack, D., and Packman, A.I. 2001, Sedimentation and subsurface particle capture in a stream-side flume with a gravel bed, Journal of Undergraduate Study and Independent Research, 1(1), 22-26.

8. Packman, A.I., Mackay, J.S., and Newbold, J.D. 2000, Variations in organic particle deposition rate and stream-subsurface exchange due to silt accumulation in a gravel bed, Proceedings of the ASCE/EWRI Joint Conference on Water Resources Engineering and Water Resources Planning and Management, Minneapolis, July 30 - Aug. 2, 2000.

9. Packman, A.I. 1999, Scaling bedform-driven exchange between a stream and a finite stream bed, Proceedings of the XXVIII IAHR Congress, Graz, Austria, August, 1999.