Understanding and Implementation of Interdisciplinary Water Management. 2006. Keynote Speech, International Conference on Hydrological Sciences for Managing Water Resources in the Asian Developing World, June 8-10, 2006, Guangzhou, China. 

County-Level Forecasts of Water Use in Illinois: 2005-2025, A Workshop on Report Findings. Sponsored by Illinois State Water Survey, Champaign, Illinois, June 17, 2005

Technical Assistance Needs and Research Priorities for Small Community Water Systems. Invited presentation at the MTAC Workshop on Economic and Financial Management of Small Water Supply Systems held on November12-13, 2003 in Chicago, Illinois

Analysis of Water Use Trends in the United States: 1950-1995. 2002 (June). Invited Presentation in CEDEX, Madrid, Spain

Statistical Methods for Evaluating the Impacts of Water Conservation Measures.  2002 (January) Workshop Presentation. AWWA Conservation Division. Las Vegas, Nevada

Social and Economic Implications of Groundwater Mining. 2001 International Conference of the American Institute of Hydrology.  Hydrologic Science: Challenges for the 21^st Century. Special session on Groundwater Sustainability. Bloomington, Minnesota, October 14-17, 2001

Long-Term and Short-Term Measures for Coping with Drought.  Keynote paper presented at the EC Workshop and FAO Expert Consultation “Drought Mitigation for the Mediterranean Region and the Near East. Organized by the Department of Civil and Environmental Engineering University of Catania and International Center for Agricultural Research in the Dry Areas (ICARDA). Aleppo, Syria. 29-31 May 2001.

Water Demand Management Needs and Strategies. Invited presentation for International Seminar on Implementation Strategies for Integrated Water Resources Management held on September 1-4, 2000 in Salvador, Bahia, Brazil.

Social Barriers to Integrated Management of Water Demand.  An invited keynote paper for the International Symposium on Integrated Water Resources Management sponsored by the International Association of Hydrologic Sciences, Davis California, April 9-12, 2000

The Role of Groundwater in Drought Mitigation: California Case History.  Invited Focus Group paper for the Xth World Water Congress, Melbourne Australia, March 12-16, 2000

Dziegielewski, B. and T. Bik. Investigation of Small Public water Supply Systems Economics. Conference Presentation. MTAC Regional Meeting. September 26, 2000. St. Louis, Missouri.

Management of Urban Water Demands, Presentation to the International Joint Commission on Great Lakes, Windsor, Canada, February 26, 1999.

Water Demand Management: End-Use Approaches to Assessing Water Conservation Potential for Urban Users. Australian Water and Wastewater Association, Sydney, Australia, June 3, 1999.

Water Demand Management: Recent Issues and Experiences. Sydney Water, Sydney, Australia, June 2, 1999.

Water Demand Management: The U.S. Experience. Melbourne Water, Melbourne, Australia, June 1, 1999.

Adoption of Water Conservation in Urban Areas.  Guest Lecture at Grinnell College, Grinnell Iowa, April 25, 1998.

Water Management in Megalopolises. Guest Lecture at University of Illinois, Urbana-Champaign, November 1998.

Development of Drought Contingency Plans.  Planning for the Next Drought.  A Workshop on Drought Management,  Cincinnati, Ohio, .May 5-8, 1998.

Forecasting Needs for Management of Urban Water Demand. Empresa de Aqueducto y Alcantarillado de Bogota (E.A.A.B.) (Water and Wastewater Authority of Bogota), Bogota, Columbia, November 4, 1997.

Performance of Drought Contingency Plans for Urban Utilities. Empresa de Aqueducto y Alcantarillado de Bogota (E.A.A.B.), Bogota, Columbia, November 5, 1997.

End-Use Data for Water Conservation Planning.  Empresa de Aqueducto y Alcantarillado de Bogota (E.A.A.B.), Bogota, Columbia, November 6, 1997.

Planning for Droughts. University of Puerto Rico Drought Management Conference, San Juan, Puerto Rico, May 4-6, 1995.

Minimizing the Cost of Drought Management. University of Puerto Rico, Drought Management Conference, San Juan, Puerto Rico, May 4-6, 1995.

New Approaches to Water Supply Planning: U.S. Experience.  City of San Juan Infrastructure Planning Conference,  San Juan, Puerto Rico, Sept. 14-16, 1995. 

Forecasting Long Term Urban Water Demands. The 68th Annual Conference of the Western Economic Association International, Economics and Organizational Innovation, Lake Tahoe, Nevada, June 20-24, 1993.

Modeling Water Demands and Evaluation of Drought Management Alternatives.  STELLA Modeling Workshop, The National Study of Water Management During Drought (U.S. Army Corps of Engineers), University of Washington, Seattle, Washington, June 22-26, 1992. 

Planning for Droughts at the Local Level.  The National Drought Management Conference, U.S. Army Corps of Engineers, Denver, Colorado, May 30-June 1, 1990.

Effectiveness of Price Incentives in Restricting Municipal and Industrial Water Use. Seminar on Promoting Water Conservation Through Innovative Rate Design, New York City Water Board and Delaware River Basin Commission, Princeton, New Jersey, November 1, 1990.

Water Conservation Pricing Approaches of the Metropolitan Water District of Southern California.  Seminar on Promoting Water Conservation Through Innovative Rate Design, New York City Water Board and Delaware River Basin Commission, Princeton, New Jersey, November 1, 1990.

Designing a Framework for Assessing the Impacts of Drought.  The National Drought Study Workshop, U.S. Army Corps of Engineers, Phoenix, Arizona, January 22-24, 1990.

The Role of Water Conservation in Water Planning.  Invited Paper for a Research Conference Putting Water Planning into Planning Sponsored by The Department of Planning, College of Architecture and Environmental Design, Arizona State University, Tempe, Arizona, May 16-18, 1989.

Water Conservation and Drought Management. A Research Conference Water Planning and Management Issues at Army CONUS Installations, Army Science Board, U.S. Army Corps of Engineers, Alexandria, Virginia, June 1989.

Drought Management Options.  Invited paper presented at the Tennessee Valley Authority Drought Management Conference, Knoxville, Tennessee, June 11, 1986.

Drought Management Options.  Invited paper at a colloquium on Drought Management and Its Impacts on Public Water Systems, National Research Council, Water Science and Technology Board, Boulder, Colorado, September 5, 1985.

 Altering Water Demands of Thermoelectric Power Generation. Presented at XII^th IWRA World Congress on Water Resources, New Delhi, India. November 22-25, 2005

With S.C. Sharma and H. Margono. Models for Long-term Forecasts of Public Supply Water Use. Presented at XII^th IWRA World Congress on Water Resources, New Delhi, India. November 22-25, 2005

Session Moderator. Chaired a sessions at the XIIth World Water Congress of IWRA, New Delhi, India. November 22-25, 2005

With Rania A. Abdel Khaleq. 2004. A National Water Demand Management Policy in Jordan. Presented at the International Water Demand Management Conference, Dead Sea, Jordan, May 30 to June 3, 2004.

With Tom Bik and Xiaoying Yang. 2003. Long-Term Trends in Off-Stream Water Use in The United States. XIth IWRA World Congress on Water Resources. October 5-9, 2003, Madrid, Spain

With Jack Kiefer. Water Demand Forecasting in a Regulatory Environment. 2002. Annual AWWA Conference.

IWRA Initiatives on Water Resources and Global Environmental Change. 2002 (September). International Workshop, Beijing China.

(With S. Sharma) Econometric Models of Water Use. 2002 (November), Regional IWRA Symposium. New Delhi, India.

Standards for ‘Demonstrated Need’ for Public Water Supply. Annual Specialty Conference of the American Water Resources Association and the Universities Council on Water Resources. Snowbird, Utah, July 2001

Efficient and Inefficient Uses of Urban Water.  The Xth World Water Congress of IWRA, Melbourne, Australia, March 12-16, 2000 

Session Moderator. Chaired two sessions at the Xth World Water Congress of IWRA, Melbourne, Australia. March 12-16, 2000.

Existing Efficiencies in Residential Indoor Water Use.  Conserv99: Water Efficiency Making Cents in the Next Century.  Monterey, California, January 31- February 3, 1999.

Estimating Water Savings Using  'Real Time' measurements. Conserv99: Water Efficiency Making Cents in the Next Century.  Monterey, California, January 31- February 3, 1999.

Feasibility of Water Demand Management Options in Metropolitan Areas.  Second Inter-American Dialogue on Water Management, Buenos Aires, Argentina, September 1-6, 1996.

Feasibility of Water Efficiency Standards. Proceedings of CONSERV 96. Orlando, Florida, January 4-8, 1996.

Risk and Reliability in the Design of Urban Water Supplies. Society for Risk Analysis, Japan Section, Honolulu, Hawaii, December 4-7, 1995. 

End-Use Approaches to Estimating Water Conservation Savings. Proceedings of CONSERV 93:  The New Water Agenda.  ASCE, AWRA, AWWA, Las Vegas, Nevada, December 12-16, 1993.

Lessons Learned in the California Drought, 1987-1992,  Proceedings of CONSERV 93:  The New Water Agenda.  ASCE, AWRA, AWWA, Las Vegas, Nevada, December 12-16, 1993.

Reliability of Projected Water Conservation Savings.  The 1992 AWWA Annual Conference and Exposition.  Vancouver, British Columbia, June 18-22, 1992.

Lessons of the California Drought:  1987-1992.  The 17th Annual Hazards Research and Applications Workshop.  Boulder, Colorado, July 12-15, 1992.

Water Demand Planning with IWR-MAIN Version 6.0. With Craig A. Strus. Proceedings of AWWA 1992 Computer Conference, pp. 677-684. Nashville, Tennessee, April 12-15, 1992.

Environmental Considerations in Water Supply Planning. Fourth Cooperative Joint Conference of Southern Illinois University at Carbondale and National Cheng Kung University on Economic Competitiveness in the 21st Century: Forging an Educational/Governmental/ Industrial Partnership.  Carbondale, Illinois, August 28-29, 1991.

'The Drought is Real': Designing a Successful Water Conservation Campaign. International Conference and Exhibition On Efficient Water Use.  IWRA, NWC-Mexico, MIWT, Mexico City, Oct. 21-25, 1991.

Market Penetration of Residential Retrofits. With D. Rodrigo. Annual Conference and Exposition. AWWA, Cincinnati, Ohio, July 21-24, 1991.

Reliability of Projected Water Conservation Savings. 18th National Conference on Water Resources, Planning & Management. Symposium on Urban Water Resources. ASCE, New Orleans, Louisiana, May 20-22, 1991.

Developing a Long-Term Drought Plan for Phoenix. With W.R. Mee, The National Conference and Exposition. Proceedings of CONSERV 90: Water Supply Solutions for the 1990s.  ASCE, AWRA, AWWA, NWWA, Phoenix, Arizona, August 12-15, 1990.

Commercial and Industrial Water Use in Southern California and the Potential for Water Conservation. With D. Rodrigo and F. W. Horne. The National Conference and Exposition.

Proceedings of CONSERV 90: Water Supply Solutions for the 1990s.  ASCE, AWRA, AWWA, NWWA, Phoenix, Arizona, August 12-15, 1990.

Examination of Conservation Rate Alternatives and Estimation of Demand Impacts.  With E. Timothy Barnes. The National Conference and Exposition. Proceedings of CONSERV 90:  Water Supply Solutions for the 1990s.  ASCE, AWRA, AWWA, NWWA, Phoenix, Arizona, August 12-15, 1990.

Estimating the Benefits and Costs of Implementing Conservation Measures. With William Davis. The National Conference and Exposition. Proceedings of  CONSERV 90:  Water Supply Solutions for the 1990s.  ASCE, AWRA, AWWA, NWWA, Phoenix, Arizona, August 12-15, 1990.

Planning for Water Supply and Conservation in a Desert City.  L.I.F.E. Symposium of American Society of Civil Engineers, Newark, Delaware, July 17-20, 1989.

Fostering Water Conservation During Drought.  Presented at the Association of American Geographers Annual Meeting, Baltimore, Maryland, April 22, 1989.

Removing Pollutants from Drinking Water. Seminar Paper presented to the Aquatic Biology Society, Department of Zoology, Southern Illinois University, Carbondale, Illinois, April 4, 1989.

Urban Nonresidential Water Use and Conservation.  Presented at the Symposium on Water-Use Data for Water Resource Management, American Water Resources Association, Tucson,  Arizona, August 28-31, 1988.

Application of an Optimization Procedure for Drought Planning.  Presented at Water Policy Analysis Session, Applied Geography Conference, Knoxville, Tennessee, October 14-17, 1987.

The IWR-MAIN Water Use Forecasting System.  Presented at the 1987 Annual Meeting, Universities Council on Water Resources, Inc., Hilton Head Island, South Carolina, July 29 - August 1, 1987.

Developing an Optimal Drought Plan for Phoenix. With W. Mee. Co-presented paper at the 1987 Annual Conference, American Water Works Association, Kansas City, Missouri, June 14-16, 1987.

Application of Social Science Analyses to the Problem of Urban Drought.  Engineering Foundation Conference on the Role of the Social-Behavioral Sciences in Water Resources Management, co-sponsored by the Universities Council on Water Resources.  Sheraton Santa Barbara Hotel and Spa, Santa Barbara, California, May 3-7, 1987.

Cost of Drought Management Options.  Presented at the Annual Meeting of the Association of American Geographers, Minneapolis, Minnesota, May, 1986.

Short -Term Adjustments in Urban Water Use.  Presented at the Annual Meeting of the American Geophysical Union, San Francisco, California, December, 1985.

Optimal Urban Water Supply Planning.  Presented at the Annual Meeting of the American Geophysical Union, San Francisco, California, December, 1985.

Integration of a Drought Plan and Water Conservation Plan.  Presented at Water Conservation and Planning Workshop of the American Public Works Association, Phoenix, Arizona, January 8-9, 1985.

Pricing of Water and Its Role.  Presented at Water Conservation and Planning Workshop of the American Public Works Association, Phoenix, Arizona, January 8-9, 1985.

Optimal Drought Management Strategies for Springfield, Illinois.  Presented at Urban Water 84 Specialty Conference of the ASCE Water Resources Planning and Management Division, Baltimore, Maryland, May 28-31, 1984.

Planning for Droughts:  Practical Application of Analytical Methods.  Presented at the Annual Meeting of the Association of American Geographers, Washington, District of Columbia, April 21-24, 1984.

Formulation of Utility Programs for Coping with Droughts.  Presented at Management Techniques for Water and Related Resources, Conference of the American Water Resources Association, Illinois Section, Carbondale, Illinois, April 4-6, 1984.

Benefits from Ammonia Pollution Abatement Accruing to Municipal Water Supplies in Illinois.  Presented at the Nineteenth Annual Symposium on Regional and State Water Resources Planning of the American Water Resources Association, San Antonio, Texas, October 9-13, 1983.

Optimal Drought Management Strategies for Municipal Water Supplies.  Presented at the Annual Conference of the American Water Works Association, Illinois Section, Chicago, Illinois, March 23-25, 1983.

Predicting the Quality of Stream Water During Drought.  Presented at Annual Meeting of the Association of American Geographers, Denver, Colorado, April 24-27, 1983.

Water Quality Factor in Drought Contingency Planning.  Presented at Annual Meeting of the Association of American Geographers, Los Angeles, California, April 22-26, 1981.

The Effects of Magnesium Hydroxide on Coagulation with Lime.  Presented at the Second International Conference on Advanced Wastewater Treatment Methods of the Polish Society of Sanitary Engineers, Krakow, Poland, June 6-8, 1978.

Effectiveness of Polyelectrolytes in the Removal of Suspended Solids from Coal Mining Waters.  Presented at the First National Conference on Environmental Protection in Coal Mining Areas of the Polish Society of Mining Engineers, Zgorzelec, Poland, September 3-5, 1977.

Use of Dolomitic Lime for Stabilization of Water in Water Treatment.  Presented at the Sixth National Conference on Water Resources Management,  Polish Society of Sanitary Engineers, Poznan, Poland, September, 1976.

Effectiveness of Filter Media Coated with Polyelectrolytes in Water Treatment.  Presented at the First International Meeting of Polish Chemical Society on Physical and Chemical Methods in Water and Wastewater Treatment, Lublin, Poland, May 22-24, 1976.