CEE Faculty Profile

Philip J. Roberts

Professor

Affinity Group: Environmental Fluid Mechanics and Water Resources

Office: Mason 225
Phone: 404/894-2219
Email: proberts@ce.gatech.edu

Research Interests

  • Environmental fluid mechanics, mixing and dynamics of rivers, lakes, coastal waters, and estuaries
  • Outfalls for wastewater discharge
  • Mathematical models of wastewater fate and transport
  • Oceanographic field programs and data interpretation

Education

  • Ph.D., Environmental Engineering Science, California Institute of Technology, 1977.
  • M.S., Environmental Engineering Science, California Institute of Technology, 1972.
  • S.M., Mechanical Engineering, Massachusetts Institute of Technology, 1970.
  • B.Sc. (Eng), Mechanical Engineering, First Class Honors, Imperial College of Science and Technology, 1968.

Honors

  1. Appointed to “Expert Panel on Fate and Effects of Brine Discharge” State of California Water Resources Control Board, October 2011 -
  2. Distinguished Scholar, NOAA Oceans and Human Health Initiative, 2006-2009.
  3. 1999-2000 Outstanding Interdisciplinary Activity Award, School of CEE (with Don Webster).
  4. UPS Foundation Visiting Professor, Stanford University, 1993-94.
  5. 1980 Collingwood Prize of ASCE for paper: "Line Plume and Ocean Outfall Dispersion." Elected Fellow, American Society of Civil Engineers, December 1995
  6. Elected Fellow, American Society of Civil Engineers, December 1995
  7. Awarded Certificate of Merit for Technology Transfer, U.S. EPA for software and manual: “Dilution Models for Effluent Discharges (Third Edition).” EPA/600/R-94/086, U.S. Environmental Protection Agency, Office of Research and Development, Washington, DC.
  8. Invited Guest lecturer, Pan American Health Organization, “Marine Wastewater Disposal and Outfall Design,” Limon, Costa Rica, November 1995, Veracruz, Mexico, April 1996, Vinha del Mar, Chile, April, 1997, Panama City, Panama, September, 1997, Lima, Peru, November, 2000.

Articles

  1. Tian, X., and Roberts, P.J.W. (2011). "Experiments on Marine Wastewater Diffusers with Multiport Rosettes." J. Hydraul. Eng., 137(10), 1148-1159.
  2. Roberts, P. J. W., Tian, X., and Jung, Y. (2011). "Physical Model Study of an Alternating Diffuser for Thermal Discharge." J. Hydraul. Eng., 137(9), 1027-1036.
  3. Roberts, P. J. W., Hunt, C. D., Mickelson, M. J., and Tian, X. (2011). "Field and Model Studies of the Boston Outfall." J. Hydraul. Eng., In press.
  4. Nekouee, N., Roberts, P.J.W., Schwab, D.J., and McCormick, M.J. (2011). "Buoyant River Plumes from Large Aspect Ratio Channels II: Near Field Dynamics." J. Hydraul. Eng., Submitted.
  5. Nekouee, N., Roberts, P.J.W., Schwab, D.J., and McCormick, M.J. (2011). "Buoyant River Plumes from Large Aspect Ratio Channels. I: Classification." J. Hydraul. Eng., Submitted.
  6. Kim, D.-i., Elovitz, M., Roberts, P.J.W., and Kim, J.-H. (2010). "Using 3D LIF to investigate and improve performance of a multichamber ozone contactor " Journal of the American Water Works Association, 102(10), 61-70.
  7. Kim, D., Nemlioglu, S., Roberts, P.J.W., and Kim, J.-H. (2010). "Ozone Contactor Flow Visualization and Quantification Using Three-Dimensional Laser-Induced Fluorescence (3DLIF)." Journal AWWA, 102(1), 90-99.
  8. Hunt, C. D., Mansfield, A. D., Mickelson, M. J., Albro, C. S., Geyer, W. R., and Roberts, P. J. W. (2010). "Plume tracking and dilution of effluent from the Boston sewage outfall." Marine Environmental Research, 70(2), 150-161.
  9. Gungor, E., and Roberts, P. J.W. (2009). "Experimental Studies on Vertical Dense Jets in a Flowing Current." J. Hydraul. Eng., 135(11), 935-948.
  10. Tian, X., and Roberts, P.J.W. (2008). "Mixing in Water Storage Tanks II: With Buoyancy Effects." J. Env. Eng., 134(12), 986-995.
  11. Tian, X., and Roberts, P.J.W. (2008). "Mixing in Water Storage Tanks I: No Buoyancy Effects." J. Env. Eng., 134(12), 974-985.
  12. Nekouee, N., Roberts, P.J.W., and Schwab, D. J. (2008). "Far Field Prediction of the Grand River Plume." 12th International Workshop on Physical Processes in Natural Waters (PPNW), UC Davis Tahoe Environmental Research Center, Incline Village, Nevada, September 2 - 5, 2008
  13. Tian, X., and Roberts, P.J.W. (2008). "Mixing in Water Storage Tanks II: With Buoyancy Effects." J. Env. Eng., 134(12), 986-995.
  14. Tian, X., and Roberts, P.J.W. (2008). "Mixing in Water Storage Tanks I: No Buoyancy Effects." J. Env. Eng., 134(12), 974-985.
  15. Tian, X., Roberts, P.J.W., and Daviero, G. J. (2006). "Marine Wastewater Discharges from Multiport Diffusers IV: Stratified Flowing Water." J. Hydraul. Eng., 132(4), 411-419.
  16. Daviero, G.J., and Roberts, P.J.W. (2006). "Marine Wastewater Discharges from Multiport Diffusers III: Stratified Stationary Water." Journal of Hydraulic Engineering, 132(4).
  17. Tian, X., Roberts, P.J.W., and Daviero, G.J. (2004). "Marine Wastewater Discharges from Multiport Diffusers I: Unstratified Stationary Water." Journal of Hydraulic Engineering, 130(12), 1137-1146.
  18. Tian, X., Roberts, P.J.W., and Daviero, G.J. (2004). "Marine Wastewater Discharges from Multiport Diffusers II: Unstratified Flowing Water." Journal of Hydraulic Engineering, 130(12), 1147-1155.
  19. (2004). "New Experimental Techniques for Validation of Marine Discharge Models." Environmental Modelling & Software, 19(7-8), 691-699.
  20. Carvalho, J. L. B., Feitosa, R. C., Rosman , P. C. C., and Roberts, P. J. W. (2006). "A Bacterial Decay Model for Coastal Outfall Plumes." Journal of Coastal Research, Special Issue 39, 1524-1528.
  21. Tian, X., and Roberts, P.J.W. (2003). "A 3DLIF System for Turbulent Buoyant Jet Flows." Expts. Fluids, 35, 636-647.
  22. Weissburg, M.J., Dusenbery, D. B., Ishida, H., Janata, J., Keller, T., Roberts, P.J.W., and Webster, D. R. (2002). "A Multidisciplinary Study of Spatial and Temporal Scales Containing Information in Turbulent Chemical Plume Tracking." Environmental Fluid Mechanics, 2, 65-94.
  23. Carvalho, J.L.B., Roberts, P.J.W., and Roldao, J. (2001). "Field Observations of the Ipanema Beach Outfall." J. Hydr. Eng., ASCE, 128(2), 151-160.
  24. Webster, D.R., Roberts, P.J.W., and Ra'ad, L. (2001). "Simultaneous DPTV/PLIF Measurements of a Turbulent Jet." Expts. Fluids, 30, 65-72.
  25. Roberts, P.J.W., Maile, K., and Daviero, G.J. (2001). "Mixing in Stratified Jets." J. Hydr. Eng., ASCE, 127(3).
  26. Daviero, G.J., Roberts, P.J.W., and Maile, K. (2001). "Refractive Index Matching in Large-Scale Stratified Experiments." Expts. Fluids, 31, 119-126.
  27. Kikas, T., Ishida, H., Roberts, P.J.W., Webster, D.R., and Janata, J. (2000). "Virtual Plume." Electroanalysis, 12, 974-979.
  28. Roberts, P.J.W. (1999). "Modeling the Mamala Bay Plumes. II: Far Field.” Journal of Hydraulic Engineering, ASCE, 125(6), 574-583.
  29. Roberts, P.J.W. (1999). "Modeling the Mamala Bay Plumes. I: Near Field.” Journal of Hydraulic Engineering, ASCE, 125(6), 564-573.
  30. Roberts, P.J.W., and Sternau, R.F. (1997). “Mixing Zone Analysis for a Coastal Wastewater Discharge.” Journal of Environmental Engineering, ASCE, 123(12), 1244-1250.
  31. Roberts, P.J.W., Ferrier, A., and Daviero, G. (1997). “Mixing in Inclined Dense Jets.” Journal of Hydraulic Engineering, ASCE, 123(8), 693-699.
  32. Roberts, P.J.W., and Snyder, W.H. (1993). "Hydraulic Model Study for the Boston Outfall. II: Environmental Performance.” Journal of Hydraulic Engineering, ASCE, 119(9), 988-1002.
  33. Roberts, P.J.W., and Snyder, W.H. (1993). "Hydraulic Model Study for the Boston Outfall. I: Riser Configuration.” Journal of Hydraulic Engineering, ASCE, 119(9), 970-987.
  34. Ferrier, A., Funk, D., and Roberts, P.J.W. (1993). "Application of Optical Techniques to the Study of Plumes in Stratified Fluids.” Dynamics of Atmospheres and Oceans, 20, 155-183.
  35. Wright, S.J., Roberts, P.J.W., Zhongmin, Y., and Bradley, N.E. (1991). "Surface Dilution of Round Submerged Buoyant Jets,” Journal of Hydraulic Research, 29, No. 1, pp. 67-89.
  36. Roberts, P.J.W. (1989). "Dilution and Transport Predictions for Ocean Outfalls.” Water Science and Technology, 21, 969-979.
  37. Roberts, P.J.W., Snyder, W.H., and Baumgartner, D.J. (1989). "Ocean Outfalls. III: Effect of Diffuser Design on Submerged Wastefield.” Journal of Hydraulic Engineering, ASCE, 115(1), 49-70.
  38. Roberts, P.J.W., Snyder, W. H., and Baumgartner, D.J. (1989). "Ocean Outfalls. II: Spatial Evolution of Submerged Wastefield.” Journal of Hydraulic Engineering, ASCE, 115(1), 26-48.
  39. Roberts, P.J.W., Snyder, W.H., and Baumgartner, DJ. (1989). "Ocean Outfalls. I: Submerged Wastefield Formation.” Journal of Hydraulic Engineering, ASCE, 115(1), 1-25.
  40. Roberts, P.J.W., and Toms, G. (1988). "Ocean Outfall System for Dense and Buoyant Effluents.” Journal of Environmental Engineering, ASCE, 114(5), 1175-1191.
  41. Roberts, P.J.W., and Toms, G. (1987). "Inclined Dense Jets in a Flowing Current.” Journal of Hydraulic Engineering, ASCE, 113(3), 323-341.
  42. Roberts, P.J.W., and Matthews, P.R. (1987). "Behavior of Low Buoyancy Jets in a Linearly Stratified Fluid.” Journal of Hydraulic Research, 25(4), 503-519.
  43. Chin, D.A., and Roberts, P.J.W. (1985). "Time Series Modeling of Coastal Currents.” Journal of Waterway, Port, Coastal and Ocean Engineering, ASCE, 111(6), 954-972.
  44. Chin, D.A., and Roberts, P.J.W. (1985). "Model of Dispersion in Coastal Waters.” Journal of Hydraulic Engineering, ASCE, 111(1), 12-28.
  45. Roberts, P.J.W., and Matthews, P.R. (1984). "Dynamics of Jets in Two-Layer Stratified Fluids.” Journal of Hydraulic Engineering, ASCE, 110(9), 1201-1217.
  46. Roberts, P.J.W. (1980). "Ocean Outfall Dilution: Effects of Currents.” Journal of the Hydraulics Division, ASCE, 106(HY5), 769-782.
  47. Roberts, P.J.W. (1979). "Line Plume and Ocean Outfall Dispersion.” Journal of the Hydraulics Division, ASCE, 105(HY4), 313-330.
  48. Roberts, P.J.W. (1979). "Two-Dimensional Flow Field of Multiport Diffuser.” Journal of the Hydraulics Division, ASCE, 105(HY5), 605-611.
  49. Roth, P.M., Roberts, P.J.W., Liu, M.K., Reynolds, S.D., and Seinfeld, J.H. (1974), "Mathematical Modeling of Photochemical Air Pollution - II. A Model and Inventory of Pollutant Emissions," Atmospheric Environment, Vol. 8, pp. 97-130.

Books

  1. Roberts, P.J.W. et al. (2010). “Marine Wastewater Outfalls and Treatment Systems.” International Water Association, London.
  2. Roberts, P.J.W., and Webster, D. R. (2002). “Turbulent Diffusion.” In Environmental Fluid Mechanics - Theories and Applications, H. Shen, ed., ASCE, Reston, Va., 467.
  3. Ettema, R., Arndt, R., Roberts, P., Wahl, T. (2000). “Hydraulic Modeling: Concepts and Practice.” ASCE Manuals and Reports on Engineering Practice, No. 97, ASCE, Reston, Virginia.
  4. Roberts, P.J.W. (1996). “Sea Outfalls.” In Environmental Hydraulics, V. P. Singh and W. Hager, Eds., Kluwer Academic Publishers, Dordrecht.
  5. Roberts, P.J.W. (1991). “Ocean Outfalls.” In Critical Reviews in Environmental Control, Conrad P. Straub, Ed., Volume 20, Issues 5&6, CRC Press, Inc.
  6. Roberts, P.J.W. (1990). “Mixing and Transport in Natural Streams.” In Encyclopedia of Fluid Mechanics, Volume 10, N. P. Cheremisinoff, Ed., Gulf Publishing.
  7. Roberts, P.J.W. (1990). “Ocean Outfall Design Considerations," in Ocean Engineering Science: The Sea, Volume 9, B. Le Mehaute and D. M. Haines, Eds., John Wiley and Sons.

Presentations

  1. Roberts, P. J. W., Villegas, B., and Libhaber, M. (2010). "Modelling urbanization effects on Lake Titicaca." Linking Ecosystem-based Science to Management in the Great Lakes of the World, Lake Tahoe, California, June 13 - 17, 2010.
  2. Nemlioglu, S., and Roberts, P. J. W. (2011). "Three Dimensional Analyses of Inclined Dense Jets under Counter and Co-flow Conditions." International Symposium on Outfall Systems, Mar del Plata, Argentina May 15-18, 2011, IWA.
  3. Frick, W., Ahmed, A., George, K., Laputz, A., Pelletie, G., and Roberts, P. (2010). "On Visual Plumes and associated applications." MWWD 2010 6th International Conference on Marine Waste Water Discharges and Coastal Environment, C. Avanzini, ed.Langkawi, Malaysia.
  4. Nekouee, N., Roberts, P.J.W., and Schwab, D.J. (2008). "Far Field Prediction of the Grand River Plume." 12th International Workshop on Physical Processes in Natural Waters (PPNW), UC Davis Tahoe Environmental Research Center, Incline Village, Nevada, September 2 - 5, 2008
  5. Gandhi, V.; Cho, M.; Kim, D. J.; Kim, D.; Wright, H.; Lee, K. H. Roberts, P.; Stoesser, T.; Kim, J. H. (2008). “UV Process Flow Visualization and Characterization Using 3-Dimensional Laser Induced Fluorescence.” American Water Works Association Annual Conference and Exposition, Atlanta, GA
  6. Nekouee, N., Roberts, P.J.W., McCormick, M.J., and Schwab, D.J. (2007). "3D Numerical Prediction of the Grand River Plume." IAGLR 50th Annual Conference on Great Lakes Research, University Park, Penn., May 28 - June 1, 2007.
  7. McCormick, M.J., Schwab, D.J., Beletsky, D., Roberts, P.J.W., Winkelman, A.G., III, A. J. F., Gungor, E., and Nekouee, N. (2007). "Dispersion of the Grand River Plume into the Coastal Waters of Lake Michigan." IAGLR 50th Annual Conference on Great Lakes Research, University Park, Penn., May 28 - June 1, 2007.
  8. Marek, M., Stoesser, T., Roberts, P.J.W., Weitbrecht, V., and Jirka, G.H. (2007). "CFD Modeling of Turbulent Jet Mixing in a Water Storage Tank." 32nd IAHR International Association for Hydraulic Research, Venice, Italy, July 1 -6.
  9. Kim, D., Lee, C., Lee, J., Lee, K., Yoon, B., Lee, S., Nemlioglu, S., Roberts, P.J.W., and Kim, J. (2006). "Developing Integrated Ozone Contactor Design Technology for Enhanced Disinfection Efficiency and DBP Control." KSWW Fall Conference, Daegu, Korea, Nov. 15-16, 2006.
  10. Nemlioglu, S., and Roberts, P.J.W. (2006). "Experiments on Dense Jets Using Three-Dimensional Laser-Induced Fluorescence (3DLIF)." MWWD 2006 - 4th International Conference on Marine Waste Water Disposal and Marine Environment, Antalya, Turkey, Nov. 6-10, 2006.
  11. Gungor, E., Roberts, P.J.W., McCormick, M.J., and Schwab, D.J. (2007). "Dynamical Behavior of the Grand River Plume Entering Lake Michigan." IAGLR 50th Annual Conference on Great Lakes Research, University Park, Penn., May 28 - June 1, 2007.
  12. Gungor, E., and Roberts, P.J.W. (2006). "Experimental Studies on Vertical Dense Jets in a Flowing Current." MWWD 2006 - 4th International Conference on Marine Waste Water Disposal and Marine Environment, Antalya, Turkey, Nov. 6-10, 2006.
  13. Roberts, P.J.W. (2005). “Modeling Ocean Outfall Discharges.” Technical University of Crete.
  14. Roberts, P.J.W., Tian, X., and Jung, Y. (2002). "Application of Three-Dimensional Laser-Induced Fluorescence to Thermal Diffusers." Hydraulic Measurements & Experimental Methods Conference 2002, Estes Park, Colorado, July 28 - August 1, 2002.
  15. Roberts, P.J.W., Hunt, C.D., and Mickelson, M.J. (2002). "Field and Model Studies of the Boston Outfall." Second International Conference on Marine Waste Water Discharges, MWWD2002, Istanbul, Turkey, September 16-20, 2002.
  16. Roberts, P.J.W., and Tian, X. (2001). "New Experimental Techniques for Validation of Marine Discharge Models." Fifth International Marine Environmental Modeling Seminar, New Orleans, LA, October 8 - 11, 2001.
  17. Carvalho, J. LB., Feitosa, R.C., Rosman, P.C.C., and Roberts, P.J.W. (2004). "A Bacterial Decay Model for Coastal Outfall Plumes." 8th International Coastal Symposium, SC, Brazil.
  18. Tian, X., and Roberts, P.J.W. (2001). "Application of Three-Dimensional Imaging to Plume Flows.” XXIX IAHR Congress, Beijing, China, September 16-21.
  19. Roberts, P. J., and Tian, X. (2000). "New Experimental Techniques for Outfall Plume Flows.” International Conference MWWD2000 - Marine Wastewater Discharges 2000, Genova, Italy, November 28 – December 1.
  20. Roldao, J., Carvalho, J. L. B., and Roberts, P.J.W. (2000). "Field Observations of Dilution on the Ipanema Beach Outfall." First World Congress of the IWA, Paris, July 3-7.
  21. Roberts, P.J.W., and Tian, X. (2000) "Three-Dimensional Imaging of Stratified Plume Flows." 5th International Conference on Stratified Flows, Vancouver, British Columbia, July 10-13.
  22. Rahman, S., Dasi, L.P., Webster, D.R., and Roberts, P.J.W. (2000). "Characteristics of Turbulent Plumes Using PLIF Technique." 2000 Joint Conference on Water Resources Engineering and Water Resources Planning and Management, Minneapolis, MN., July 30 - August 2.
  23. Webster, D.R., Roberts, P.J.W., and Ra'ad, L. (1999). “Simultaneous DPTV/PLIF Measurements of a Turbulent Jet.” Third International Conference on Particle Image Velocimetry, Santa Barbara, California, September 16-18.
  24. Webster, D.R., Roberts, P.J.W., and Ra'ad, L. (1999). "Velocity and Concentration Measurements of a Turbulent Plume.” MAR99 Meeting of The American Physical Society, Bulletin of American Physical Society, Vol. 44, No. 1, Part II, p. 1829. Atlanta, GA, March.
  25. Webster, D.R., Roberts, P.J.W., and Ra'ad, L. (1999). “Measurements in a Turbulent Chemical Odor Plume” Centennial Meeting of American Physical Society, Atlanta, GA, April 18-26.
  26. Frick, W., and Roberts, P.J.W. (1998). "Environmental Protection Agency (USA) Program Wisp: Windows Interface for Simulating Plumes.” 3rd International Conference on Hydroscience and Engineering, Cottbus, Berlin, Germany, August 31-September 3.
  27. Roberts, P.J.W. (1997). “Far Field Modeling of the Mamala Bay Outfalls.” IAWQ 19th Biennial International Conference, Vancouver, Canada, June 21-26.
  28. Daviero, G.J., and Roberts, P.J.W. (1997). “Behavior of Merging Plumes from Ocean Outfalls.” 27th IAHR Congress, San Francisco, August 11-15.
  29. Petrenko, A.A., Jones, B.H., Dickey, T.D., and Roberts, P.J.W. (1996). "Comparison of Near-Field Dilutions Derived from in Situ Measurements and Simulated Dilutions at the Sand Island Sewage Outfall Plumes, Hi.” North American Water and Environment Congress, Anaheim.
  30. Daviero, G.A., and Roberts, P.J.W. (1996). "Experimental Studies of Merging Plumes.” 11th ASCE Engineering Mechanics Conference, Ft. Lauderdale, Florida, May 19-22.
  31. Roberts, P.J.W. (1995). "Near-Field Modeling of the Mamala Bay Outfalls.” Marine Disposal Systems 1994, I. Ozturk, P.J.W. Roberts, H. Z. Sarikaya, and A. Akyarli, eds., Istanbul, Turkey, 159-166, November 9-11.
  32. Roberts, P.J.W., Ferrier, A., and Daveiro, G. (1994). "Mixing of Inclined Dense Jets." 47th Annual Meeting of the Division of Fluid Dynamics, American Physical Society, Atlanta, November 20-22.
  33. Roberts, P.J.W., Ferrier, A., and Johnson, B.H. (1994). "New Techniques for Experimental Studies of Dredged Material Dispersion.” Second International Conference on Dredging and Dredged Material Displacement, Dredging '94., E. C. McNair, ed., Orlando, FL, Nov 13-16.
  34. Roberts, P.J.W. (1990), "Dilution Hydraulic Model Study for the Boston Wastewater Outfall," International Conference on Physical Modeling of Transport and Dispersion, Massachusetts Institute of Technology, August 7-10.
  35. Roberts, P.J.W., and Wilson, D. (1990), “Field and Model Studies of Ocean Outfalls,” National Conference on Hydraulic Engineering, ASCE, San Diego, July 30-August 3, 1990.
  36. Roberts, P.J.W. (1988), “Dilution and Transport Predictions for Ocean Outfalls," IAWPRC 14th Biennial Conference, Brighton, England, July 17-22.
  37. Roberts, P.J.W., and Snyder, W.H. (1987), "Merging Buoyant Jets in a Stratified Crossflow,” Third International Symposium on Density-Stratified Flows, IAHR, California Institute of Technology, Pasadena, 3-5 February.
  38. Roberts, P.J.W. (1985), "Jet Mixing in Linearly Stratified Fluids," IUTAM Symposium on Mixing in Stratified Fluids, Western Australia, 25-29 August.
  39. Roberts, P.J.W., Pernik, M., and Benke, A.C. (1985), “Mixing in River-Floodplain Systems," XXI IAHR Congress, Melbourne, Australia, 19-23 August, Vol. 3, pp. 485-489.
  40. Dortch, M.S., and Roberts, P.J.W. (1983), "Mathematical Modeling of Thermal Regimes for Pumped-Storage Reservoirs," XX IAHR Congress, Moscow, USSR, 5-9 September, Vol. 3, paper B.a. 14, pp. 120-127.
  41. Chin, D.A., and Roberts, P.J.W. (1982), "Modeling Dispersion in the Marine Environment," ASCE Annual Convention, New Orleans, October 25-27.
  42. Roberts, P.J.W., and Matthews, P.R. (1982), "Mixing in Pumped Storage Reservoirs," ASCE Hydraulics Division Specialty Conference, Jackson, Miss., August 17-20, Proceedings, pp. 199-205.
  43. Roberts, P.J.W. (1981), "Digital Analysis of Current Meter Data for Predicting the Dispersion of Pollutants," Time Series Methods in Hydrosciences, Proceedings of an International Conference, Toronto, Canada, October 6-8, A.H. El-Shaarawi, Ed., pp. 351-361.
  44. Roberts, P.J.W. (1979), "A Mathematical Model of the Initial Dilution Process of Deepwater Ocean Outfalls," ASCE Joint Hydraulics - Energy Division Specialty Conference, San Francisco, August 8-10, Proceedings, pp. 218-225.
  45. Roberts, P.J.W. (1979), "Current Measurements and Mathematical Modeling in Southern Puget Sound," presented at workshop in New Orleans, June 18-20, in: Estuarine and Wetland Processes with Emphasis on Modeling, P. Hamilton and K.B. MacDonald, Eds., pp. 269-284, Plenum Press, 1980.
  46. Roberts, P.J.W. (1979), "Effects of Currents on Ocean Sewage Outfall Design," presented at the XVIIIth IAHR Congress, Cagliari, Italy, Sept. 10-14, Vol. 4, paper C.b.9, pp. 197-204.