aaron i. packman · application of x-ray difference microtomography to characterize arsenic-rich...

Aaron I. Packman

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Contact Information:

Department of Civil and Environmental Engineering

Northwestern University

2145 Sheridan Road, Evanston IL 60208-3109

phone: 847-491-9902, email: [email protected]

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 May, 1997

California Institute of Technology, Pasadena, California

M.S. Environmental Engineering and Science June, 1992

California Institute of Technology, Pasadena, California

B.S. Mechanical Engineering, with Minor in History, cum laude June, 1991

Washington University, St. Louis, Missouri

Post-Graduate Training:

Microbial Pathogenesis, Northwestern Feinberg School of Medicine Mar.– Oct., 2007

Experience:

Northwestern University, Dept. of Civil and Environmental Engineering

Professor Sept. 2010 – present

Associate Professor Sept. 2004 – Aug. 2010

Assistant Professor Sept. 2000 – Aug. 2004

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:

Huber Research Prize, American Society of Civil Engineers 2008

Career Award, National Institutes of Health (NIAID K25) 2006

McCormick Excellence Award, Northwestern University 2006

Searle Junior Teaching Fellow, Northwestern University 2001-2002

Career Award, National Science Foundation 1999

Department of Defense Graduate Fellowship 1991-1994

Myers Fellowship (full tuition, four year), Washington University 1987-1991

Aaron I. Packman

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Professional Activity and Service

Professional Affiliations:

American Geophysical Union

American Society of Civil Engineers

American Society for Microbiology

North American Benthological Society

American Society of Limnology and Oceanography

International Association for Sediment Water Science

International Association of Hydraulic Engineering & Research

Professional Service:

Editorships

Limnology and Oceanography – Fluids and Environments, Associate Editor (2010 – present)

Water Resources Research, Associate Editor (1999 – 2009)

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

Society Leadership:

Consortium of Universities for the Advancement of Hydrologic Science, Board of Directors (2009 – present)

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

Organization of Technical Conferences and Workshops:

NSF Hydrologic Synthesis Summer Institute, Vancouver, June-August, 2010

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

AGU Spring Meeting / NABS Joint Assembly, Organizing Committee, 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 – 2010)

Conference Sessions Chaired and Organized:

AGU Fall Meeting, 2010, Predicting Behavior of Freshwater Systems in a Changing Environment

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

Aaron I. Packman

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

NSF Hydrologic Synthesis Summer Institute, Director and Faculty Mentor (2010)

USDA Workshop on Pathogens in Rural and Agricultural Water and Watersheds, Invited Panelist (2010)

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)

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

Panelist (2007)

Universidad de Chile and Pontificia Universidad Católica 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, Journal of Fluid Mechanics, Geophysical Research Letters,

Environmental Science & Technology, Biogeosciences, Water Resources Research, Ecosystems, Environmental

Fluid Mechanics, 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.

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Research Funding:

Total external research funding: $9,645,432. Currently active research funding: $5,945,469.

Current Research Projects:

NSF:

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.

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.

NIH:

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

– 2011.

Metabolic heterogeneity and antibiotic susceptibility in biofilms, A.I. Packman, D. Chopp, and M. Parsek,

$1,870,420, NIH/NIAID R01AI081983, R56AI081983, 2009-2014.

Synchrotron imaging of crystalline biofilms in urinary catheters, A.I. Packman and J.-F. Gaillard, NIH/NIAID

R21AI079640, $445,792, 2009 – 2011.

Other federal research agencies:

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.

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 2007-02855, $399,954, 2008 – 2010.

Industrial organizations and foundations:

Characterizing the interactions between pathogens and biofilms and their fate and transport in distribution

systems, A.I. Packman, Water Research Foundation 4259, $300,000, 2009 – 2012.

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.

Assessing and managing biofilms in drinking water distribution systems, M. Hausner and A.I. Packman, Water

Research Foundation, $225,000, 2008 – 2010.

Completed research projects:

NSF:

SGER: Observing the development of biofilm structure under controlled complex flow patterns, A.I. Packman,

NSF CBET-0730976, $128,822, 2007 – 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.

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Completed research projects (continued):

NSF (continued):

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.

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.

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.

Other federal research agencies:

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.

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.

Community-based urban environmental issues, K.A. Gray, A.I. Packman, & J.-F. Gaillard, Dept. of Education,

GAANN P200A030154, $409,504, 2003 – 2007.

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.

Industrial organizations and foundations:

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.

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

Hydrologic and solute transport analyses to support the Des Plaines Wetland Demonstration Study, Wetlands

Research Inc., $20,000, A.I. Packman, 2004.

Mobilization and downstream transport of Cryptosporidium by storm flows, Philadelphia Water Department,

$35,000, A.I. Packman, 2000 – 2000.

Proposals Pending:

None.

Aaron I. Packman

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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.

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Publications

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. Guan, K., Thompson, S.E., Harman, C.J., Basu, N.B., Rao, P.S.C., Sivapalan, M., Packman, A.I., and

Kalita, P.K., Spatio-temporal scaling of hydrological and agrochemical export dynamics in a tile-drained

Midwestern watershed, Water Resources Research, submitted.

2. Zhang, W., Sileika, T., Chen, C., Liu, Y., and Packman, A.I., A novel planar flow cell for studies of biofilm

heterogeneity and flow-biofilm interactions, Applied and Environmental Microbiology, submitted.

3. Stonedahl, S.H., Harvey, J.W., Wörman, A., Salehin, M., and Packman, A.I., A multi-scale model for

integrating hyporheic exchange from ripples to meanders, Water Resources Research, in press.

4. Larned, S.T., Packman, A.I., Plew, D.R., and Vopel, K., 2010, Interactions between the mat-forming alga

Didymosphenia geminata and its hydrodynamic environment, Limnology and Oceanography: Fluids and

Environments, in press.

5. Chen, C., Packman, A.I., Zhang, D., and Gaillard, J.-F., 2010, A multi-scale investigation of coupled

interfacial transport, pore fluid flow, and fine particle deposition in a sediment bed, Water Resources

Research, DOI:10.1029/2009WR009018, in press.

6. Arnon, S., Marx, L.P., Searcy, K.E., and Packman, A.I., 2010, Effects of overlying velocity, particle size

and biofilm growth on stream-subsurface exchange of particles, Hydrological Processes, 24(1), 108-114,

DOI:10.1002/hyp.7490.

7. 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.

8. 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.

9. 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.

10. 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.

11. 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.

12. 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.

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13. 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.

14. 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].

15. 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.

16. 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].

17. 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.

18. 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.

19. 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.

20. 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.

21. 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.

22. 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].

23. 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.

24. 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.

25. 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.

26. 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.

27. 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].

28. 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.

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29. Wörman, A., Kløve, B., Wachniew, P., Czupryński, P., and Packman, A., 2005, Tracer test in Hobøl Creek,

Norway, under different flow conditions, Acta Geophysica Polonica, 53(4), 517-526.

30. 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.

31. 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.

32. 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.

33. 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.

34. 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.

35. 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.

36. 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.

37. 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.

38. 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.

39. 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.

40. 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.

41. 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.

42. 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.

43. Packman, A.I., and Salehin, M. 2003, Relative roles of stream flow and sedimentary conditions in

controlling hyporheic exchange, Hydrobiologia, 494, 291-297.

44. 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.

45. 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.

Aaron I. Packman

10

46. 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.

47. 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.

48. 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.

49. 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.

50. Packman, A.I., and Brooks, N.H. 2001, Hyporheic exchange of solutes and colloids with moving bedforms,

Water Resources Research, 37(10), 2591-2605.

51. 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.

52. 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.

53. 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.

54. 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.

55. 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.

Aaron I. Packman

11

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.

Patents

Patent application, "UV Disinfectant Device for Biofilm Flow Cell,” Packman, A.I., Zhang, W., and Sileika, T.,

submitted September 27, 2010.

Presentations

Presentation Awards

The Peter Gilbert Poster Award for Excellence in Innovation and Biofilm Control, A. I. Packman, W. Zhang, T.

Sileika, Y. Liu, and C. Chen, “Interplay between environmental gradients and biofilm growth,” 5th ASM

Conference on Biofilms, 2009.

Keynote and Plenary Presentations:

Sixth International Symposium on Ecohydraulics, Christchurch, New Zealand, February, 2007

Second Iowa Workshop on Large Rivers, Contaminated Sediments: Fate and Transport, Lucille A. Carver

Mississippi Riverside Environmental Research Station, Fairport, Iowa, October 2004

Kerner von Marilaun Workshop: Long Term Development in Fluvial Ecology, Keynote Lecture at the

University of Vienna, Nov. 2003.

Gordon Conference on Permeable Sediments, Bates College, Lewiston, Maine, June 2003.

Savannah River Site Workshop, Department of Energy, Office of Science, March 2003.

AWRA Specialty Conference, Water Quality Monitoring and Modeling, San Antonio, April 2001.

Other Invited Presentations:

AGU Fall Meeting, San Francisco, December 2010.

Illinois Science and Technology Leadership Luncheon (presentation to Illinois congressional delegation and

science committee staff), Washington, D.C., October, 2010.

ASLO/NABS Joint Meeting, Santa Fe, June 2010.

AGU Fall Meeting, San Francisco, December 2009.

AGU-CGU Joint Assembly, Toronto, May 2009.

Washington University, Department of Energy, Environmental and Chemical Engineering, February 2009.

Univeristy of Washington, Department of Microbiology, August, 2008.

Technical Meeting on Sediment Conclusion Testing, EU REACH progam, Copenhagen, Denmark, June, 2008.

Universidad Tarapacá de Arica, Faculty of Sciences, Arica, Chile, April, 2008.

Pontificia Universidad Católica de Chile, Department of Hydraulic and Environmental Engineering, Santiago,

Chile, March, 2008.

University of Nevada-Reno, Hydrologic Sciences Program, February, 2008.

Workshop on Stochastic Transport and Emergent Scaling in Earth-surface Processes, Lake Tahoe, Nov. 2007.

Universidad de Chile, Department of Hydraulic and Environmental Engineering, Santiago, Chile, June 2007.

Stanford University, Department of Civil and Environmental Engineering, March 2007.

Aaron I. Packman

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New Zealand National Institute of Water and Atmospheric Research (NIWA), National Centre for Water

Resources, Christchurch, New Zealand, January 2007.

Geological Society of America, Annual Meeting, Philadelphia, Pennsylvania, October 2006.

Invited Presentations (continued):

University of Illinois, Department of Civil and Environmental Engineering, October 2006.

University of California, Davis, Department of Land, Air, and Water Resources, May 2006.

Massachusetts Institute of Technology, Department of Civil and Environmental Engineering, April 2006.

Tsinghua University, Department of Hydraulic Engineering, Beijing, China, March 2006.

Southwest Jiaotong University, School of Civil Engineering and School of Environmental Science and

Engineering, Chengdu, China, March 2006.

University of Notre Dame, Department of Civil Engineering and Geological Sciences, March 2006.

Pontificia Universidad Católica de Chile, Department of Hydraulic and Environmental Engineering, Santiago,

Chile, October 2005.

Geological Society of America, Annual Meeting, Salt Lake City, October 2005.

UNESCO Workshop on Groundwater-Surface Water Interactions and Nutrient Behavior in River Corridors,

University of Oxford, UK, September 2005.

AGU-NABS Joint Assembly, New Orleans, May 2005.

University of Arizona, Department of Hydrology and Water Resources, February 2005

Oregon State University, University Hydrology Seminar Series, April 2003.

5th International Conference on Hydroscience and Engineering, Warsaw, Poland, September 2002.

Swedish University for Agricultural Sciences (SLU), Dept. of Biometry and Informatics, September 2002.

U.S.-Chinese Joint Workshop on Sediment Transport and Environmental Studies, Milwaukee, July 2002.

AGU Spring Meeting, Washington, D.C., May 2002.

University of Wisconsin, Environmental Chemistry and Technology Program, February 2002.

Uppsala University, Sweden, Department of Earth Sciences, September 2001.

EPA National Exposure Research Lab, Athens, Georgia, June 2001.

Georgia Institute of Technology, School of Civil and Environmental Engineering, October 2000.

DuPont Workshop on Modeling and Management of Emerging Environmental Issues, July 2000.

University of Arizona, Department of Hydrology and Water Resources, March 2000.

Purdue University, School of Civil Engineering, March 2000.

Northwestern University, Department of Civil and Environmental Engineering, February 2000.

University of Texas, Department of Civil Engineering, February 2000.

Temple University, Department of Geology, February 2000.

DuPont Corporate Remediation Group, Wilmington, November 1999.

University of Delaware, Department of Geology, October 1999.

University of Colorado, Dept. of Civil, Environmental, and Architectural Engineering, April 1999

U.S. Geological Survey, Trenton District Office, September 1997.

Aaron I. Packman

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Conference Presentations:

Solute and fine sediment storage and remobilization by floods in a sand-bed stream, Harvey, J.W., Packman,

A.I., Jerolmack, D.J., Drummond, J., Martin, R., McPhillips, L.E., Aubeneau, A., Sawyer, A.H., Henry, E.J.,

And Tobias, C.R, 2010 GSA Denver Annual Meeting, Denver, Oct.-Nov. 2010

Effect of hydrodynamic conditions on patterns of biofilm growth and effectiveness of antimicrobials, W.

Zhang, T. Sileika, C. Chen, Y. Liu, J. Lee, A. I. Packman, 17th Annual Midwest Microbial Pathogenesis

Conference, St. Louis, Sept., 2010.

Synchrotron tomographic imaging of Proteus mirabilis biofilms in encrusted urinary catheters, M. El-Natour, J.

Lee, D. Peng, J. Drummond, D.J. Stickler, D.T. Keane, J.-F. Gaillard, A.I. Packman, 17th Annual Midwest

Microbial Pathogenesis Conference, St. Louis, Sept., 2010.

Relationships between environmental conditions and microbial processes mediated by hydrodynamic transport

conditions, A. Packman, W. Zhang, J. Lee, ASLO/NABS 2010 Summer Meeting, Santa Fe, Jun. 2010.

The effects of particle size and form on POC deposition rates and downstream transport in streams, J.D.

Drummond, S.R. Geleskie, J.D. Newbold, A.I. Packman, ASLO/NABS 2010 Summer Meeting, Santa Fe, Jun.

2010.

Improved modeling of hyporheic exchange using CTRW: First application to field data, A.F. Aubeneau, S.H.

Stonedahl, J.W. Harvey, A.I. Packman, ASLO/NABS 2010 Summer Meeting, Santa Fe, Jun. 2010.

Hydrogeomorphic drivers of stream ecological processes: The 2009 Clear Run, NC studies, L.E. McPhillips,

J.W. Harvey, A.I. Packman C.R. Tobias, J.D. Jerolmack, J.K. Bohlke, E.J. Henry, L.G. Larsen, A. Aubeneau, J.

Drummond, ASLO/NABS 2010 Summer Meeting, Santa Fe, Jun. 2010.

The didymo strategy: how do big algal mats persist in swift, oligotrophic rivers?, S.T. Larned, D.R. Plew, A.I.

Packman, K.C. Vopel, ASLO/NABS 2010 Summer Meeting, Santa Fe, Jun. 2010.

Managing biofilms in drinking water distribution systems, S. Waller, M. Hausner, A. Packman, AWWA Annual

Conference, Chicago, Jun. 2010.

Three-dimensional visualization and analysis of arsenic aggregates in porous media using X-ray difference

microtomography, D. Peng, M. Alsina, C. Chen, D.T. Keane, A.I. Packman, J.-F. Gaillard, A.F. Aubeneau, P.A.

Pastén, G. Pizarro, GeoX 2010 – 3rd international workshop on X-ray CT for geomaterials, New Orleans, Mar.

2010.

Subsurface fate and transport modeling of Cryptosporidium parvum, T. Harter, E.R. Atwill, Y. Park, A. Cortis,

and A.I. Packman, 2010 EPA Symposium on Ground Waterborne Infectious Disease Epidemiology, Etiologic

Agents, and Indicators, Washington D.C., Jan. 2010.

Designing and interpreting laboratory experiments for hydrodynamical, biogeochemical, and ecological

processes in rivers, A.I. Packman, AGU Fall Meeting, San Francisco, Dec., 2009 (Invited).

A parsimonious model for transport of fine sediments and sediment-bound contaminants in rivers, A.F.

Aubeneau,, N. Basu, L. Fraccarollo, M. Hassan, G. McGrath, A.I. Packman, P.S.C. Rao and S. Thompson,

AGU Fall Meeting, San Francisco, Dec., 2009.

Biogeochemical signatures of contaminant transport at the watershed scale: Spectral and wavelet analysis,

K. Guan, C. Harman, N. Basu, P.S.C. Rao, M. Sivapalan, P.K. Kalita, and A.I. Packman, AGU Fall Meeting,

San Francisco, Dec., 2009.

Exploring emergent hydrologic and biogeochemical patterns in catchments at multiple scales, P.S.C. Rao, M.

Sivapalan, N. Basu, M.A. Hassan, A.I. Packman, and G.S McGrath, AGU Fall Meeting, San Francisco, Dec.,

2009.

Aaron I. Packman

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Conference Presentations (continued):

A simple linear catchment-response model for investigating sediment efflux associated with climate and land

use change in Goodwin Creek, MS. A.F. Aubeneau, M.A. Hassan, A.I. Packman, and S. Thompson, AGU Fall

Meeting, San Francisco, Dec., 2009.

Determining the concentration and distribution of arsenic deposits in rock matrices and porous media by X-ray

difference microtomography, D. Peng, M. Alsina, C. Chen, D.T. Keane, A.I. Packman, J.-F. Gaillard, A.F.

Aubeneau, P.A. Pastén, G. Pizarro, AGU Fall Meeting, San Francisco, Dec., 2009.

Interplay between environmental gradients and biofilm growth, A.I. Packman, W. Zhang, T. Sileika, Y. Liu, and C. Chen, 5th ASM Conference on Biofilms, Cancun, Mexico, November, 2009.

Effects of fluid conditions on multi-species interactions in biofilms, W. Zhang, T. Sileika, Y. Liu, C. Chen, and

A. I. Packman, 5th ASM Conference on Biofilms, Cancun, Mexico, November 2009.

Managing biofilms in drinking water distribution systems, S. Waller, M. Hausner, and A.I. Packman, 5th ASM

Conference on Biofilms, Cancun, Mexico, November 2009.

Synchrotron tomographic imaging of crystalline biofilms in encrusted urinary catheters, J, Lee, M, El-Natour,

D, Peng, J. Drummond, D.J. Stickler, D.T. Keane, J.-F. Gaillard, and A.I. Packman, 5th ASM Conference on

Biofilms, Cancun, Mexico, November 2009.

Ecological interactions in multi-species biofilms under imposed gradients of fluid flow and nutrient influx,

W. Zhang, T. Sileika, Y. Liu, C. Chen, and A.I. Packman, ASM General Meeting, Philadelphia, May 2009.

Assessing biofilms in drinking water distribution systems, S. Waller, M. Hausner, and A. Packman, ASM

General Meeting, Philadelphia, May 2009.

Effects of nutrient flux and hydrodynamic shear on patterns of biofilm growth, W. Zhang, T. Sileika, and A.I.

Packman, AAAS Annual Meeting, Chicago, Feb. 2009

Interactions of Cryptosporidium parvum oocysts with sediments and biofilms: Implications for waterborne

disease transmission in agricultural watersheds, A.I. Packman, T. Harter, E.R. Atwill, X. Li, and B.L.T. Lau,

USDA-CSREES National Water Conference, St. Louis, Feb., 2009.

Linking contaminant migration in rivers to contaminant reservoirs in fluvial sediments: The unusual case of

arsenic in the Rio Loa Watershed, Atacama desert, Chile, A.I. Packman, J.F. Gaillard, P. Pastén, G. Pizarro, M.

Alsina, A. Vega, A. Florenzano, L.A.S. MacDonald, and, C. Chen, Seventh International Symposium on

Ecohydraulics, Concepcion, Chile, Jan. 2009.

Combined physical and biogeochemical processes control the mobility of arsenic in rivers of the Atacama

desert, Northern Chile, A.I. Packman, J.F. Gaillard, P. Pastén, G. Pizarro, M. Alsina, A. Vega, A. Florenzano,

L.A.S. MacDonald, and, C. Chen, AGU Fall Meeting, San Francisco, Dec., 2008.

Use of 3D x-ray difference micro-tomography and pore-scale simulation to investigate colloid deposition,

changing pore geometry, fluid flow, and solute transport in porous media, C. Chen, A.I. Packman, J.-F.

Gaillard, and D.T. Keane, SAC Cross-cut Review of Geological, Environmental, and Planetary Science at the

Advanced Photon Source, Argonne National Laboratory, July, 2008.

Spatial and temporal scales associated with nutrient and carbon transformations in rivers, A. I. Packman, D. J.

Jerolmack, T. J. Battin, J. L. Tank, M. Sivapalan, A. Wörman, P. D. Brooks, E. J. Rosi-Marshall, B. L. Rhoads,

M. E. Pakula, and R. Rajbanshi, ASLO Summer Meeting, St. John’s, Newfoundland, Canada, June, 2008.

Distributions of arsenic and other geothermally derived elements in the Rio Loa system, northern Chile, L. A. S.

MacDonald, M. Hestin, J.-F. Gaillard, A. I. Packman, M. Alsina, A. Florenzano, A. Vega, P. Pastén, and G.

Pizarro, ASLO Summer Meeting, St. John’s, Newfoundland, Canada, June, 2008.

Aaron I. Packman

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Modification of river hydraulics and near-bed flow structure by the invasive diatom Didymosphenia geminata,

A.I. Packman, S. Larned, D. Plew, and K. Vopel, ASCE/EWRI World Water and Environmental Resources

Congress, Honolulu, May, 2008.

Assessing and managing biofilms in drinking water distribution systems, S. Waller, M. Pryor, W. Soucie, A.

Packman, and M. Hauser, AWWA Illinois Section Meeting, Springfield, March, 2008.

Pore-scale simulation of the effects of colloid deposition on fluid flow and solute transport, C. Chen, B.L.T.

Lau, J.-F. Gaillard, D.T. Keane, and A.I. Packman, AGU Fall Meeting, San Francisco, Dec., 2007.

Processes affecting the transport of Cryptosporidium parvum and other persistent pathogens in surface- and

groundwaters. A.I. Packman, B.L.T. Lau, T. Harter, and E.R. Atwill, AGU Fall Meeting, San Francisco, Dec.,

2007.

Microbes, fluvial networks, and carbon fluxes from land to the ocean, T.J. Battin, L.A. Kaplan, S. Findlay, C.S.

Hopkinson, E. Marti, A.I. Packman, J.D. Newbold, and F. Sabater, AGU Fall Meeting, San Francisco, Dec.,

2007.

Modeling streambed hyporheic exchange using a spectral scaling based pumping model, S.H. Stonedahl, J.W.

Harvey, A. Wörman, and A.I. Packman, AGU Fall Meeting, San Francisco, Dec., 2007.

Experimental study and modeling of the stream-subsurface exchange of p,p’-DDE in the presence of naturally

occurring fine particles, C. Camarena, D. Otero, J. Ren, G.A. Burton, Jr., and A.I. Packman, AGU Fall Meeting,


Fractal scaling for surface water-subsurface water interaction through the earth’s crust, A. Wörman, L.

Marklund, A.I. Packman, J.W. Harvey and S.H. Stonedahl, AGU Fall Meeting, San Francisco, Dec., 2007.

Effect of the vertical structure of a porous bed on hyporheic exchange, M. Zaramella, A. Marion, A.I. Packman,

and A. Bottacin, IAHR 32nd

International Congress, Venice, July, 2007.

Processes influencing pathogen transmission in groundwaters and surface waters, A.I. Packman, T. Harter, and

E.R. Atwill, USDA/FDA/UC Coordinated Management of Water Quality Protection & Food Safety, San Luis

Obispo, Apr. 2007 (Invited).

Environmental factors controlling hyporheic flow and biogeochemical reaction rates beneath the sediment

interface of streams and floodplains, J.W. Harvey, J.K. Bohlke, C.C. Fuller, L.G. Larsen, A.I. Packman, D.T.

Scott, C.R. Tobias, AGU Fall Meeting, San Francisco, Dec. 2006 (Invited).

Use of 3D X-ray computed microtomography to observe in situ sediment structure and colloidal zirconia

deposits at the pore scale, C. Chen, A.I. Packman, D.T. Keane, and J.-F. Gaillard, AGU Fall Meeting, San

Francisco, Dec. 2006 (Hydrology Section Outstanding Student Paper Award).

Structure, Transport, Transformation: Hydrodynamic controls on redox conditions and microbial metabolism in

surficial sediments; A.I. Packman, S. Arnon, and K.A. Gray; GSA Annual Meeting, Philadelphia, Oct. 2006

(Invited).

Interaction of Cryptosporidium parvum oocysts with Pseudomonas aeruginosa biofilms and sediments, B.L.T.

Lau, L. Marx, K.E. Searcy, A.I. Packman, E.R. Atwill, and T. Harter, ASM General Meeting, Orlando, May

2006.

Implications of hyporheic structure and biophysicochemical process coupling for modeling nitrogen dynamics

in rivers, A.I. Packman, J.D. Newbold, S. Arnon, and K.A. Gray, NABS Annual Meeting, Anchorage, Jun.

2006.

Particle retention in benthic biofilms, L.A. Marx, K.E. Searcy, S. Arnon, and A.I. Packman, NABS Annual

Meeting, Anchorage, Jun. 2006.

Aaron I. Packman

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Flow conditions and substrate geometry strongly influence benthic denitrification, S. Arnon, A.I. Packman, and

K.A. Gray, NABS Annual Meeting, Anchorage, Jun. 2006.

Cryptosporidium parvum in small watersheds: Transport in streams and streambed sediments, T. Harter, K.E.

Searcy, A. Cortis, L. Hous, A.I. Packman, E.R. Atwill, USDA - CSREES National Water Quality Conference,

San Antonio, Feb. 2006.

Structure, Transport, Transformation: A framework for analysis of denitrification and other microbially

mediated processes in aquatic systems, A.I. Packman, S. Arnon, and K. A. Gray, AGU Fall Meeting, San

Francisco, Dec. 2005.

Use of 3D X-ray computed microtomography to observe the development of sediment structure and colloidal

zirconia deposits at the pore scale, C. Chen, A.I. Packman, D.T. Keane, and J.-F. Gaillard, AGU Fall Meeting,

San Francisco, Dec. 2005.

Predicting hyporheic exchange of water and solutes in streams on the basis of a priori estimates of stream

physical characteristics, S.H. Stone, J.W. Harvey, A.I. Packman, and A. Worman, AGU Fall Meeting, San

Francisco, Dec. 2005.

Characterization of Intensively Managed Landscapes: Illinois River Basin case study, P. Kumar, E. Andrews,

W. Bland, D. Borah, J. Braden, R. Cooke, W. Eheart, E. Herricks, S. Hollinger, R. Holmes, T. Johnson, D.

Keefer, L. Keefer, W. Krajewski, E. Krug, K. Kunkel, X. Liang, G. McIsaac, E. Mehnert, T. Over, A. Packman,

T. Papanicolaou, G. Rao, B. Rhoads, B. Ruddell, M. Sivapalan, R. Sparks, J. Talley, L. Weber, A. Wehrmann,

D. Winstanley, and D. Wuebbles, AGU Fall Meeting, San Francisco, Dec. 2005.

Long-term transport of Cryptosporidium parvum, C. Andrea, T. Harter, L. Hou, E.R. Atwill, A. Packman, K.

Woodrow-Mumford, and S. Maldonado, AGU Fall Meeting, San Francisco, Dec. 2005.

Defining hyporheic zones: Challenges in space and time, M.N. Gooseff, A.I. Packman, and C.N. Dahm, GSA

Annual Meeting, Salt Lake City, Utah, Oct. 2005 (Invited).

The expanding scope of hyporheic-zone investigations in streams, rivers, and wetlands: Connecting small-scale

storage processes with reach-scale cumulative effects, J.W. Harvey, M.H. Conklin, C.C. Fuller, A.I. Packman,

and J.E. Saiers, GSA Annual Meeting, Salt Lake City, Utah, Oct. 2005 (Invited).

Effect of sediment structure on hyporheic exchange and pore water transport, A.I. Packman and A. Marion, 10th

International Symposium on the Interactions of Sediments and Water, Bled, Slovenia, Aug.-Sep. 2005.

Hydrodynamics as multi-scale control on cells and solutes - an overview, S. Findlay, A.I. Packman, K.E.

Searcy, and T. Battin, AGU-NABS Joint Assembly, New Orleans, Louisiana, May 2005 (Invited).

The effect of flow velocity on periphyton structure and nitrate removal, S. Arnon, A.I. Packman, and K.E. Gray,


Transmission of water-borne disease: Interplay of hydrodynamic processes, sediments, and biofilms in the

transport of Cryptosporidium parvum in surface waters, K.E. Searcy, A.I. Packman, E.R. Atwill, and T. Harter,


Fine sediments and hyporheic exchange in human-altered streams, A.I. Packman and R.J. Ryan, EGU General

Assembly, Vienna, Austria, April 2005.

The influence of hyporheic exchange on primary productivity and phosphorus uptake in urbanizing streams,

R.J. Ryan, A. I. Packman, and S.S. Kilham, ESA Mid-Atlantic Conference, Baltimore, Mar. 2005.

Use of 3D x-ray microtomography to observe the structure of colloidal zirconia deposits in sand columns, S.

Stone, C. Cheng, D.T. Keane, J.-F. Gaillard, and A.I. Packman, AGU Fall Meeting, San Francisco, Dec. 2004.

Aaron I. Packman

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Evolution of the size distribution of fine suspended sediments during downstream transport: Role of stream-

subsurface exchange, J. Ren and A.I. Packman, AGU Fall Meeting, San Francisco, Dec. 2004.

Influencia da heterogeneidade de aquifero e da morfologia fluvial em fluxos bi e tridimensionais na zona

hiporreica, J.E.R. Matos, A.I. Packman, and C. Welty, 3rd Meio Ambiente Congresso Nacional, Salvador,

Brazil, October 2004.

Scaling hyporheic exchange fluxes as a basis for interpreting reactive solute and particle dynamics in streams,

A.I. Packman, NABS Annual Meeting, Vancouver, British Columbia, June, 2004.

Influence of fine sediments on solute transport in the Valley Creek watershed, R.J. Ryan and A.I. Packman,

AGU Spring Meeting, Montreal, May 2004.

The impact of oocyst-sediment associations on the transport Cryptosporidium parvum in surface waters, K.E.

Searcy, A.I. Packman, E.R. Atwill, and T. Harter, EGU Meeting, Nice, France, Apr. 2004.

Changes in fine sediment size distributions due to interactions with streambed sediments, A.I. Packman and J.

Ren, PASSED: From Particle Size to Sediment Dynamics (an International Workshop), Hanse Institute of

Advanced Studies, Delmenhorst, Germany, April, 2004.

Application of 3D X-ray micro-tomography to analyze grain size distributions and pore structure in intact

sediment cores, D.T. Keane, J.-F. Gaillard, and A.I. Packman, PASSED: From Particle Size to Sediment

Dynamics (an International Workshop), Hanse Institute of Advanced Studies, Delmenhorst, Germany, April,

2004.

Hyporheic exchange with complex channel morphologies, A.I. Packman and M. Salehin, AGU Fall Meeting,


Channel morphology, bedforms and aquifer heterogeneity: Roles in 2-D and 3-D analysis of hyporheic

exchange flows, J.E.R. Matos, A.I. Packman, and C. Welty, AGU Fall Meeting, San Francisco, Dec., 2003.

The association Cryptosporidium parvum with suspended sediments: Implications for transport in surface

waters, K.E. Searcy, A.I. Packman, E.R. Atwill, and T. Harter, AGU Fall Meeting, San Francisco, Dec., 2003.

Hyporheic exchange with heterogeneous streambeds: Laboratory experiments and modeling, M. Salehin, A.I.

Packman, and M. Paradis, AGU Fall Meeting, San Francisco, Dec., 2003.

Stream-groundwater interactions: The influence of aquifer heterogeneity and stream meandering on 2-D and 3-

D hyporheic exchange flows, J.E.R. Matos, C. Welty, and A.I. Packman, MODFLOW and More 2003:

Understanding through Modeling, Golden, Colorado, Sept., 2003.

Multi-phase contaminant transport in sediment beds. A.I. Packman and J. Ren. World Water and Environmental

Resources Congress, Philadelphia, June, 2003.

Suspended organic matter in stream and river networks: passenger or driver? J.D. Newbold, S.A. Thomas, and

A.I. Packman. NABS Annual Meeting, Athens, Georgia, May, 2003.

Physicochemical processes in turbidity currents, A.I. Packman, and D. Jerolmack, AGU Fall Meeting, San

Francisco, Dec., 2002.

Stream-groundwater interactions and near-stream flow systems: The influence of aquifer heterogeneity and

stream meandering on three-dimensional hyporheic exchange flows, J.E.R. Matos, C. Welty and A.I. Packman,


Modeling and experimental studies of simultaneous exchange of colloids and sorbing contaminants between

streams and streambeds, J. Ren and A.I. Packman, AGU Fall Meeting, San Francisco, Dec., 2002.

Documenting of the effects of urban sprawl on a model watershed near Philadelphia, Pennsylvania, Welty, C.,

Kilham, S.S., Packman, A.I. and Brulle, R.J., AWRA Annual Conference, Philadelphia, Nov., 2002.

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The impacts of urbanization on hyporheic exchange and nutrient dynamics in Valley Creek, Ryan, R.J.,

Packman, A.I., and Kilham, S.S., AWRA Annual Conference, Philadelphia, Nov., 2002.

Challenges in Ecohydraulics: Biophysicochemical Processes at the Stream-Subsurface Interface, A.I. Packman,

T.J. Battin, and J.D. Newbold, Fifth International Conference on Hydroscience and Engineering, IAHR,

Warsaw, Poland, Sept., 2002.

Modeling fine sediment transport in streams: Dynamics of interactions with stream bed sediments, A.I.

Packman, 5th International Conference on Hydroscience and Engineering, Symposium on River Sedimentation

and Morphodynamic Processes, IAHR, Warsaw, Poland, Sept., 2002 (Invited).

Stream-subsurface exchange, suspended sediment transport, and fine sediment deposition in streambeds, A.I.

Packman, U.S.-Chinese Joint Workshop on Sediment Transport and Environmental Studies, Milwaukee, July,

2002 (invited).

Implications of the coupled transport of colloids and contaminants in streams and streambeds, J. Ren and A.I.

Packman, U.S.-Chinese Joint Workshop on Sediment Transport and Environmental Studies, Milwaukee, July,

2002 (invited).

Fundamental processes controlling stream-subsurface exchange of colloids and contaminants, J. Ren and A.I.

Packman, 76th Colloid and Surface Science Symposium of the ACS, Ann Arbor, June, 2002.

Implications of hyporheic exchange processes for contaminant transport in streams and streambeds, A.I.

Packman and J. Ren, AGU Spring Meeting, Washington, D.C., May, 2002 (Invited).

Relative roles of stream flow and sedimentary conditions in controlling hyporheic exchange, A.I. Packman, and

M. Salehin, Ninth International Symposium on the Interactions Between Sediments and Water, IASWS, Banff,

Canada, May, 2002.

Anthropogenic modification of stream flow in a small urbanizing watershed, R. Ryan, A.I. Packman, and C.

Welty, 9th International Symposium on the Interactions Between Sediments and Water, IASWS, Banff, Canada,

May, 2002.

Use of ambient contamination and stream tracer injections to assess solute transport in an urbanizing watershed.

Ryan, R.J., Packman, A.I., Welty, C., and Kilham, S.S., AGU Spring Meeting, Washington, D.C., May, 2002.

The importance of biophysicochemical transport processes in hyporheic exchange, A.I. Packman, AGU Fall

Meeting, San Francisco, Dec., 2001.

Detailed characterization of hyporheic exchange and in-stream solute mixing in a small agricultural stream in

Sweden, M. Salehin, A.I. Packman, and A. Wörman, AGU Fall Meeting, San Francisco, Dec., 2001.

Parameter Estimation of the Transient Storage Model for Stream-Subsurface Exchange, A. Marion, M.

Zaramella, and A.I. Packman, AGU Fall Meeting, San Francisco, Dec., 2001.

Methods for determination of time scales and exchange rates of inert solutes in the hyporheic zone, A. Wörman,

A.I. Packman, H. Johansson, and K. Jonsson, AGU Fall Meeting, San Francisco, Dec., 2001 (Invited).

Re-examination of the wash load concept: Role of physicochemical processes, A.I. Packman, ASCE/EWRI

World Water and Environmental Resources Congress, Orlando, May, 2001.

Clogging of stream beds due to extensive clay deposition, J.S. Mackay and A.I. Packman, AGU Fall Meeting,


Variations in organic particle deposition rate and stream-subsurface exchange due to silt accumulation in a

gravel bed, A.I. Packman, J.S. Mackay, and J.D. Newbold, ASCE Water Resources Engineering Conference,

Minneapolis, July-Aug., 2000.

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Variation in colloid collision efficiency due to the size of collector media, J. Ren, A.I. Packman, and C. Welty,

74th Colloid and Surface Science Symposium of the ACS, Lehigh, June, 2000.

Particle size and ionic strength effects on stream-subsurface exchange of colloids, J. Ren, A.I. Packman, and D.

Jerolmack, AGU Spring Meeting, Washington D.C., May, 2000.

Interplay of stream-subsurface exchange, benthic delivery of particulate organic carbon, and stream bed

siltation, J.S. Mackay, A.I. Packman, and J.D. Newbold, AGU Fall Meeting, San Francisco, Dec., 1999

Relationship between colloid filtration and media hydraulic conductivity, J. Ren, A.I. Packman, and C. Welty,


Scaling bedform-driven exchange between a stream and a finite streambed, A.I. Packman, XXVIII IAHR

Congress, Graz, Austria, Aug., 1999.

Fundamental models for the exchange of nonconservative tracers across the stream/groundwater interface, A.I.

Packman, AGU Spring Meeting, Boston, May, 1998.

Tracer exchange between a stream and stream bed with fast-moving bedforms, A.I. Packman and N.H. Brooks,

AGU Fall Meeting, San Francisco, Dec. 1997.

Modeling clay colloid transport in sand-bed streams, A.I. Packman, N.H. Brooks, and J.J. Morgan, AGU Fall

Meeting, San Francisco, Dec. 1996.

Laboratory investigation of clay exchange in sand-bed streams, A.I. Packman, N.H. Brooks, and J.J. Morgan,

7th International Symposium on the Interactions Between Sediments and Water, Baveno, Italy, Sept. 1996

Transport of clay particles from stream to stream bed, A.I. Packman and N.H. Brooks, Sixth International

Symposium on the Interactions Between Sediments and Water, Santa Barbara, Dec. 1993

Aaron I. Packman

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Teaching and Mentoring

Courses Taught at Northwestern University:

GEN ENG 205-2 Engineering Analysis II (Freshman Level)

CIV ENG 260 Fundamentals of Environmental Engineering (Sophomore Level)

CIV ENG 261 Environmental Engineering Analysis (Junior Level)

CIV ENG 440 Environmental Transport Processes (Graduate)

CIV ENG 448 Biophysicochemical Processes in Environmental Systems (Graduate).

CIV ENG 516 Seminar in Environmental Engineering (Graduate)

Courses Taught at Drexel University:

tDEC 100 Freshman Seminar

CIVE 340 Municipal Water Facilities (Junior Level)

CIVE 360 Water Quality (Junior Level)

CIVE 430 Introduction to Hydrology (Junior/Senior Level)

CIVE 767 Surface Water Mixing Processes (Graduate)

CIVE 768 Sediment and Contaminant Transport (Graduate)

Short Courses:

NSF Hydrologic Synthesis Summer Institute, “Solute transport and nutrient dynamics from the cellular

scale to the river network scale,” and “Harmful algal blooms in rivers: Invasion and blooming behavior of

Didymosphenia geminata” (two weeks each), University of British Columbia, June 24 – August 10, 2010

Environmental Transport Processes: Physical phenomena and biogeochemical dynamics in fluvial systems,

Pontificia Universidad Católica de Chile, 6–28 March, 2008

Research and Thesis Supervision:

Current Graduate students:

S. Stonedahl, Ph.D. in Civil and Environmental Engineering, Three-dimensional surface-groundwater

interactions in small streams: Relating morphology to subsurface solute residence times.

W. Zhang, Ph.D. in Civil and Environmental Engineering, Coupling of external and internal transport

processes in biofilms: Implications for biofilm heterogeneity, industrial biofilm control, and the treatment

of biofilm-based infections.

S. Waller, Ph.D. in Civil and Environmental Engineering (co-advised with Martina Hausner), Assessing

biofilms in drinking water distribution systems.

J. Drummond, Ph.D. in Chemical and Biological Engineering, Implications of particle delivery to and

association with biofilms on organic carbon dynamics and waterborne disease transmission.

J. Lee, Ph.D. in Chemical and Biological Engineering, Flow-biofilm interactions and metabolic

heterogeneity in biofilms.

A. Aubeneau, Ph.D. in Civil and Environmental Engineering, Linking geomorphodynamics, solute

transport, and benthic biogeochemical processes in rivers.

Former Graduate students:

Northwestern University:

M. Barnes (Masters in Biotechnology, 2009, co-advised with Nicholas Cianciotto), Persistence and survival

of Legionella pneumophila in biofilms.

C. Chen (Ph.D., 2008, co-advised with Jean-François Gaillard), Pore-scale investigation of colloid

deposition, changing pore geometry, fluid flow, and solute transport in porous media.

Aaron I. Packman

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Former Graduate students, Northwestern University (continued):

R. Rajbanshi (M.S., 2008), Imaging fine particle interactions with bacterial biofilms in flow cells.

J. Miceli (M.S./M.P.M., 2006), Biofilm growth in cooling towers.

L. Marx (B.S./M.S. 2006), Deposition, retention, and resuspension of fine particles in benthic biofilms.

K. Searcy (Ph.D. 2005), Transport of Cryptosporidium parvum in surface waters: Interactions with

suspended sediments, bed sediments, and biofilms.

M. Salehin (Ph.D., 2004), Hydrodynamics of hyporheic exchange for complex natural streambed

topography, channel geometry, and sediment structure.

J. Ren (Ph.D., 2003), Exchange of adsorbing contaminants between streams and streambeds in the presence

of colloidal particles.

Drexel University:

R. Ryan (Ph.D., 2004), The impact of urbanization on the transient storage characteristics, phosphorus

uptake dynamics and community metabolism of Valley Creek.

J. Mackay (B.S./M.S., 2001). Linking stream-subsurface interactions, streambed structure, and fine particle

dynamics in rivers

Post-Doctoral Researchers:

Y. Liu (2007-2008), Biofilm adhesion, growth, and control on industrial and environmental surfaces.

B. Lau (2005-2007), Association of Cryptosporidium parvum with benthic biofilms

S. Arnon (2004-2006), Pore water fluxes, periphyton structure, and denitrification in streams and wetlands.

Visiting Scholars:

D. Peng (Southwest Jiaotong Univ., 2008 – 2010), Arsenic distributions in sediments of the rivers of

northern Chile.

M. Alsina (Católica Univ., 2008 – 2009, co-advised with Jean-François Gaillard), Synchrotron methods for

arsenic speciation and distribution in sediments.

F. Boano (Politecnico di Torino, 2006), A continuous-time random walk model for solute transport in

rivers.

G. Singer (Univ. Vienna, 2005), Relating morphological heterogeneity to microbial heterogeneity in

streambeds.

D. Giuliani (Univ. Padova, 2003), Solute transport in structured streambeds.

M. Zaramella (Univ. Padova, 2001), Theoretical evaluation of the principal parameters of the transient

storage model for hyporheic exchange.

D. Jerolmack (MIT, 2001), Physicochemical processes in turbidity currents.

Undergraduate Research Supervised:


K. Simonson, A. Cheema, E. Herberg, M. El Natour (2008-2010), G. Kim (2008-2010), L. Rossi (2008-

2010), J. Chhun (2008-2009), A. Rahman (2008-2009), K. Ruehlow (2008-2009), T. Sileika (2007-2009),

L. MacDonald (2007-2008), M. Pakula (2007-2008), A. Jones (2007), J. Kessler (2006), L. Marx (2004-

2005), K. Rehg (2002-2003), L. Pigion (2003), M. Paradis (2002).

Drexel University:

D. Jerolmack (1999-2000), J. MacKay (1999-2000).

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Student Awards Supervised:

C. Chen, A.I. Packman, D.T. Keane, J.-F. Gaillard, and B. Lau, Outstanding Student Paper Award, 2006

AGU Fall Meeting. Use of 3D X-ray computed microtomography to observe in situ sediment structure and

colloidal zirconia deposits at the pore scale.

S. Waller, M. Pryor, W. Soucie, A. Packman, and M. Hauser, Best Student Presentation Award, 2008

AWWA Illinois Section Meeting, Assessing and managing biofilms in drinking water distribution systems.

University Service


University Committees

Environmental Science, Engineering, and Policy Program Committee (2010 – present)

Environmental Sciences Program Committee (2004 – present)

Office for Research Limited Submissions Advisory Committee (2010 – 2011)

McCormick School of Engineering and Applied Science Committees

Murphy Institute Organizing Committee (2006 – 2007)

Murphy Institute Participating Faculty (2007 – present)

McCormick Safety Committee (2009 – present)

Department of Civil and Environmental Engineering Committees

Web Page Committee (2001 – 2002)

Graduate Curriculum Committee (2001 – 2002, 2004 – 2005)

Director, Qualifying Examination (2002, 2004, 2005, 2008)

Chair, Department Strategic Planning Committee (2005 – 2006)

Undergraduate Curriculum Committee (2005 – 2006)

Faculty Search Committee (2005 – 2006, 2007 – 2008, 2009 – 2010, 2010 – 2011 chair)

Department Chair Search Committee (2008 – 2009)

Computing Resources Committee (2008 – present)

Faculty Advisory Committee (2009 – present, chair 2010 – 2011)

Graduate Student Exam Committees:

Kenny Fournillier, Ph.D. in Civil and Environmental Engineering, ongoing

Katie Kalscheur, Ph.D. in Civil and Environmental Engineering, ongoing

Catherine Stewart, Ph.D. in Microbiology (IGP), ongoing

Yuan Yao, Ph.D. in Mechanical Engineering, 2009

Xiaohao Li, Ph.D. in Civil and Environmental Engineering, 2009

George Sprouse, Ph.D. in Civil and Environmental Engineering, 2008

Jill Kostel, Ph.D. in Civil and Environmental Engineering, 2006

Cari Ishida, Ph.D. in Civil and Environmental Engineering, 2005

Yong Chen, Ph.D. in Mechanical Engineering, 2005

Drexel University:

Department of Civil and Architectural Engineering Committees:

Space Committee (1998 – 2000)

Undergraduate Curriculum Committee (1998 – 2000)

Faculty Search Committee (1999 – 2000)

Graduate Student Exam Committees:

Mohammed Siddiqui, Ph.D. in Civil Engineering, 2004

aaron i. packman · application of x-ray difference microtomography to characterize arsenic-rich...

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