Contact James (Jim) Roy:

Phone & Address



Member, National Ground Water Association, International Association of Hydrogeologists


NSERC Post-doctoral Fellowship, University of Calgary

Ph.D. in Hydrogeology, University of Waterloo (PGS B NSERC)

Instructor of groundwater courses, University of Waterloo (2004), McMaster University (2012)

M.Sc. in Soil Physics, University of Guelph


James (Jim) Roy

Research Scientist - Research on Groundwater Quality and Related Processes

CURRENT S&T / RESEARCH - Contributing to Environment Canada’s mandate to ensure aquatic ecosystems are conserved and protected

  • Groundwater contaminant impacts on surface waters and aquatic ecosystems
  • Groundwater contributions of phosphorus to surface waters
  • Potential leakage of Alberta oil sands tailings ponds to the Athabasca River
  • Groundwater and gas systems (e.g. coal-bed methane, attenuation of petroleum spill plumes)




Science and policy advice related to groundwater contributions of contaminants and nutrients to surface waters

Graduate student and post-doctoral fellow supervision and committees

Journal and grant reviewer


43. Roy, J.W., L. Grapentine, G. Bickerton. 2017. Ecological effects from groundwater contaminated by volatile organic compounds on an urban stream’s benthic ecosystem. Limnologica (in press)


42. Roy, J.W., H.C. McLeod, M. Suchy, J.E. Smith. 2017. Total dissolved gas pressure measurements for assessing contaminant degradation processes in groundwater. Groundwater Monitoring and Remediation (in press)


41. Spoelstra, J., J.W. Roy, S.J. Brown. 2016. Syringe-tip filters may contain the artificial sweetener saccharin.  Groundwater Monitoring and Remediation 36(4): 71-74. doi:10.1111/gwmr.12183. 


40. Robertson, W.D., D.R. Van Stempvoort, J.W. Roy, S.J. Brown, J. Spoelstra, S.L. Schiff, D.R. Rudolph, S. Danielescu, G. Graham. 2016. Use of an artificial sweetener to identify sources of groundwater nitrate contamination. Groundwater 54(4): 579-587. DOI: 10.1111/gwat.12031.


39. Roy, J.W., G. Bickerton, R.A. Frank, L. Grapentine, L.M. Hewitt. 2016. Assessing risks of shallow riparian groundwater quality near an oil sands tailings pond. Groundwater 54(4): 545-558. DOI: 10.1111/gwat.12392. 


38. Ryan, M.C., J.W. Roy, D.J. Heagle. 2015. Dissolved gas ‘concentrations’ or ‘concentration estimates’ – A comment on “Origin, distribution and hydrogeochemical controls on methane occurrences in shallow aquifers, southwestern Ontario, Canada” by J.C. McIntosh, S.E. Grasby, S.M. Hamilton, and S.G. Osborn. Applied Geochemistry 63(21), 218-221.


37. Fitzgerald, A., J.W. Roy, J.E. Smith. 2015. Calculating discharge of phosphorus and nitrogen with groundwater to a small urban stream reach. J. Hydrol. 528: 138-151.


36. Roy, J.W., R. McInnis, G. Bickerton, P.L. Gillis. 2015. Assessing potential toxicity of chloride-affected groundwater discharging to an urban stream using juvenile freshwater mussels (Lampsilis siliquoidea). Science of the Total Environment 532: 309-315.


35. McLeod, H., J.W. Roy, J.E. Smith. 2015. Patterns of entrapped air dissolution in a 2-dimensional pilot-scale synthetic aquifer. Groundwater 53(2): 271-281. DOI: 10.1111/gwat.12203. 


34. Roy, J.W., S. Danielescu. 2014. Comment on “Assessing invertebrate assemblages in the subsurface zone of stream sediments (0–15 cm deep) using a hyporheic sampler” by Dole-Olivier et al. Water Resour. Res. 50(11): 9120–9123. 


33. Frank, R.A., J.W. Roy, G. Bickerton, S.J. Rowland, J.V. Headley, A.G. Scarlett, K.M. Peru, J.L. Parrott, M. Conly, L.M. Hewitt.  2014. Rebuttal to Comment on "Profiling oil sands mixtures from industrial developments and natural groundwaters for source identification" by Yi et al. Environmental Science & Technology 48(18): 11015−11016.


32. Frank, R.A., J.W. Roy, G. Bickerton, S.J. Rowland, J.V. Headley, A.G. Scarlett, K.M. Peru, J.L. Parrott, M. Conly, L. M. Hewitt. 2014. Profiling oil sands mixtures from industrial developments and natural groundwaters for source identification. Environmental Science & Technology 48(5): 2660-2670. DOI:10.1021/es500131k.


31. Roy, J.W., G. Bickerton, 2014. Elevated dissolved phosphorus in riparian groundwater along gaining urban streams. Environmental Science & Technology DOI: 10.1021/es404801y.


30. Van Stempvoort, D.R., J.W. Roy, S.J. Brown, G. Bickerton. 2014. Residues of the herbicide glyphosate in riparian groundwater in urban catchments. Chemosphere 95: 455-463.


29. Roy, J.W., D.R. Van Stempvoort, G. Bickerton. 2014. Artificial sweeteners as potential tracers of landfill leachate. Environmental Pollution 184: 89-93.


28. Robertson, W.D., J.W. Roy, S.J. Brown, D.R. Van Stempvoort, G. Bickerton. 2014. Natural attenuation of perchlorate in denitrified groundwater. Groundwater DOI:10.1111/gwat.12031.


27. Langston, G., M. Hayashi, J.W. Roy. 2013. Quantifying groundwater surface water interactions in a proglacial moraine using heat and solute tracers. Water Resources Research 49(9): 5411–5426.


26. Van Stempvoort, D.R., J.W. Roy, J. Grabuski, S.J. Brown, G. Bickerton, E. Sverko. 2013. An artificial sweetener and pharmaceutical compounds as co-tracers of urban wastewater in groundwater. Science of the Total Environment 461-462: 348-359. DOI: 10.1016/j.scitotenv.2013.05.001


25. Roy, J.W., M.C. Ryan. 2013. Effects of Unconventional Gas Development on Groundwater: A Call for Total Dissolved Gas Pressure Measurements. Ground Water 51(4): 480-482. DOI: 10.1111/gwat.12065


24. Jackson, R.E., A.W. Gorody, B. Mayer, J.W. Roy, M.C. Ryan, D.R. Van Stempvoort. 2013. Groundwater Protection and Unconventional Gas Extraction: The Critical Need for Field-Based Hydrogeological Research. Ground Water 51(4): 488–510. DOI: 10.1111/gwat.12074 


23. Roy, J.W., A. Malenica. 2013. Nutrients and toxic contaminants in shallow groundwater along Lake Simcoe urban shorelines. Inland Waters 3(2), pp. 125-138. DOI: 10.5268/IW-3.2.521


22. Marinas, M., J.W. Roy, J.E. Smith. 2013. Changes in entrapped gas content and hydraulic conductivity with pressure. Ground Water 51(1): 41-50. DOI: 10.1111/j.1745-6584.2012.00915.x 


21. Roy, J.W., G. Bickerton. 2012. Toxic groundwater contaminants: An overlooked contributor to urban stream syndrome?  Environmental Science & Technology 46(2), 729–736 doi: 10.1021/es2034137


20. Van Stempvoort, D.R., J.W. Roy, S. Brown, G. Bickerton. 2011. Artificial sweeteners as potential tracers in groundwater in urban environments. J. Hydrology doi:10.1016/j.jhydrol.2011.02.013 


19. McClymont, A.F., J.W. Roy, L.R. Bentley, M. Hayashi, H. Maurer, G. Langston. 2011. Imaging groundwater flow paths within proglacial moraine using multiple geophysical methods. J. Hydrology doi:10.1016/j.jhydrol.2010.12.036 


18. Roy, J.W., B. Zaitlin, S.B. Watson, M. Hayashi. 2011. Influence of groundwater spring discharge on small-scale spatial variation of an alpine stream ecosystem. Eco-hydrology Journal 4(5), DOI: 10.1002/eco.156. 


17. Roy, J.W., G. Bickerton. 2010. Comment on "Estimation of actual LNAPL thickness at a fuel-contaminated Arctic mine site" by Olumide Iwakun, Kevin Biggar and David Sego. Cold Regions Science and Technology doi: 10.1016/j.coldregions.2010.09.007 


16. Roy, J.W., G. Bickerton. 2010. A proactive screening approach for detecting groundwater contaminants along urban streams at the reach-scale.  Environmental Science & Technology 44(16), 6088–6094. DOI: 10.1021/es101492x.


15. Roy, J.W., M.C. Ryan. 2010. In-well degassing issues for measurements of dissolved gases in groundwater. Ground Water DOI: 10.1111/j.1745-6584.2010.00703.x


14. Roy, J.W., M. Hayashi. 2009. Multiple, distinct groundwater systems of a single moraine-talus feature in an alpine watershed. J. Hydrology doi:10.1016/j.jhydrol.2009.04.018.


13. Roy, J.W., J.M. Robillard, S.B. Watson, M. Hayashi. 2009. Non-intrusive characterization methods for wastewater-affected groundwater plumes discharging to an alpine lake. Environ. Monit. Assess. 149(1): 201-211, DOI 10.1007/s10661-008-0194-9.


12. Roy, J.W., M. Hayashi. 2008. Ground water exchange with two small alpine lakes in the Canadian Rockies. Hydrological Processes 22: 2838-2846, doi: 10.1002/hyp.6995. 


11. Roy, J.W., J.E. Smith, R.W. Gillham. 2007. Capillary effects on natural remobilization of pools of dense non-aqueous phase liquid mixtures in porous media. Soil and Sediment Contamination 16(3): 253-268, doi: 10.1080/15320380701285659. 


10. Roy, J.W., J.E. Smith. 2007. Multiphase flow and transport caused by spontaneous gas phase growth in the presence of dense non-aqueous phase liquid. Journal of Contaminant Hydrology 89: 251-269, doi:10.1016/j.jconhyd.2006.09.011. 


9. Hood, J. L., J.W. Roy, M. Hayashi. 2006. Importance of groundwater in the water balance of an alpine headwater lake. Geophysical Research Letters. 33, L13405, doi:10.1029/2006GL026611.


8. Roy, J.W., J.E. Smith, R.W. Gillham. 2004. Laboratory evidence of natural remobilization of multicomponent DNAPL pools due to dissolution.  Journal of Contaminant Hydrology 74:145-161.


7. Gillham, R.W., J.W. Roy. 2004. Comment on "A reassessment of ground water flow conditions and specific yield at Borden and Cape Cod" by G. Grimestad. Ground Water 42(3):456-7.


6. Roy, J.W., J.E. Smith. 2004. Comment on "Mobilization and entry of DNAPL pools into finer sand media by cosolvents: two-dimensional chamber studies" by Michael E. Van Valkenburg and Michael D. Annable. Journal of Contaminant Hydrology 70:147-150.


5. Roy, J.W., J.E. Smith, R.W. Gillham. 2002. Natural remobilization of multi-component DNAPL pools due to dissolution. Journal of Contaminant Hydrology 59:163-186.


4. Roy, J.W., J.C. Hall, G.W. Parkin, C. Wagner-Riddle, B.S. Clegg. 2001. Seasonal leaching and biodegradation of dicamba in turfgrass. Journal of Environmental Quality 30:1360-1370.


3. Roy, J.W., G.W. Parkin, C. Wagner-Riddle. 2000. Timing of nitrate leaching from turfgrass after multiple fertilizer applications. Water Quality Research Journal of Canada 35(4):735-752.


2. Roy, J.W., G.W. Parkin, C. Wagner-Riddle. 2000. Water flow in unsaturated soil below turfgrass: observations and LEACHM (within EXPRES) predictions. Soil Science Society of America Journal 64(1): 86-93.


1. Schirmer, M., B.J. Butler, J.W. Roy, E.O. Frind, J.F. Barker. 1999. A least-square-fit method to determine unique Monod kinetic parameters of BTEX compounds using batch experiments. Journal of Contaminant Hydrology 37:69-86.

Expertise Categories associated with this S&T Expert:

Pollution & Waste
          Physicochemical processes
          Water quantity
          Water quality
     Water Quality
          Subsurface water inputs
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