Dr. Ian G. Droppo

Research Scientist - Study Leader, Sediment and Contaminant Transport in Impacted Environments

Current research and/or projects

Contributing to Environment Canada's mandate to ensure that aquatic ecosystems are conserved and protected

  • Sources, fate and effects of sediment and associated contaminants in natural, urban and engineered systems
  • Pathogen and aquatic sediment interactions
  • Particle dynamics: Investigation of the relationship between floc form and function
  • Biostabilization of contaminated bed sediments
  • Sediment and contaminant dynamics

Professional activities / interests

15 year contribution to Board of Directors - International Association for Sediment Water Science - including President

Subject Editor (physcial and biogeochemical processes) for the international Journal of Soils and Sediments

Co-supervisor of Ph.D and M.Sc. students as adjunct professor at McMaster University, University of Toronto (Scarborough), Ryerson University and the State University of New York.

Research grant and journal paper reviews, including reviewer of NSERC Strategic and Discovery grants, NSF grants, NERC grants

Education and awards

Awarded Leverhulme Visiting Research Fellowship at the University of Exeter, UK (2001/2002)

B.A. Hons., M.Sc., McMaster University; Ph.D. University of Exeter, UK

Key publications

Ghadakpour, M., Bester, E., Liss, S.N., Gardam, M., Droppo, I.G., Hota, S. and Wolfaardt, G.M. 2014. Integration and proliferation of Pseudomonas aeruginosa PAO1 in multispecies biofilms. Microbial Ecology, 68: 121-131. http://link.springer.com/article/10.1007/s00248-014-0398-1

Grangeon, T., Droppo, I.G., Legout, C. and Esteves, M. 2014 From Soil Aggregates to Riverine Flocs: a Laboratory Experiment Assessing the Respective Effects of Soil Type and Flow Shear Stress on Particles Characteristics. Hydrological Processes, 28: 4141-4155. http://onlinelibrary.wiley.com/doi/10.1002/hyp.9929/abstract

Plach, J.M., Lin, S., Droppo, I.G. and Warren, L.A. 2014. Iron Cycling in a Littoral Freshwater Beach: Implications for Floc Trace Metal Dynamics. Journal of Great Lakes Research, 40(1): 47-57. http://www.sciencedirect.com/science/article/pii/S0380133014000082

Elliott, A.V.C., Plach, J.M., Droppo, I.G., Warren, L.A. 2014. Collaborative microbial Fe-redox cycling by pelagic floc bacteria across wide ranging oxygenated aquatic systems. Chemical Geology, 336: 90-102. http://www.sciencedirect.com/science/article/pii/S000925411300555X

Azimi, Y. Chen, X. Allen, D. G. Pileggi, V. Seto, P. Droppo, I. G. and Farnood R. R. 2013. UV Disinfection of Wastewater Flocs: the Effect of Secondary Treatment Conditions, Water Science and Technology, 67: 2719-2723. http://www.iwaponline.com/wst/06712/wst067122719.htm

Gabowski, R.C., Wharton, G., Davies, G.R. and Droppo, I.G. 2012. Spatial and temporal variations in the erosion threshold of fine river-bed sediments. Journal of Soils and Sediments, 12: 1174-1188. http://link.springer.com/article/10.1007/s11368-012-0534-9#

Droppo, I.G., Krishnappan, B.G., Liss, S.N., Marvin, C. and Biberhofer, H. 2011. Modelling sediment-microbial dynamics in the South Nation River, Ontario, Canada: towards the prediction of aquatic and human health risk. Water Research, 45(12): 3797-3809.

Grabowski, R.C., I.G. Droppo and G. Wharton. 2011. Erodibility of cohesive sediment: the importance of sediment properties. Earth-Science Reviews, 105: 101-120.

Droppo, I.G., S.N. Liss, D. Williams, T. Nelson, J. Jaskot and B. Trapp. 2009. The dynamic existence of waterborne pathogens within river sediment compartments - Implications for water quality regulatory affairs. Environmental Science and Technology, 43(6): 1737-1743.


Adjunct Full Professor, School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario

Adjunct Professor, Physical and Environmental Sciences, University of Toronto, Scarborough.

Adjunct Professor, Department of Chemistry and Biology, Ryerson University, Toronto, Ontario.

Adjunct Assistant Professor, Department of Geography and Planning, State University of New York, College at Buffalo