International/National

• Steward, D. R., keynote speaker, Groundwater in the Kansas High Plains and transportation to sustain agriculture, 96th Annual Kansas Transportation Engineering Conference, Manhattan, KS April 8-9, 2014.
• Steward, D. R., Inaugural OAP Workshop Featured Presentation, Longevity of the Ogallala Aquifer in Kansas, Ogallala Aquifer Program 2014 Workshop, Lubbock, Texas. March 25-26, 2014.
• Steward, D. R., KSU Ogallala Aquifer Study, 4th Annual EPA Region 7/8 and State Departments of Agriculture Meeting, Lenexa, KS, January 7-8, 2014.
• Steward, D. R., plenary session, Groundwater to sustain agriculture in the Midwest’s prairies: Interdisciplinary, integrated modeling approaches, 57^th Midwest Ground Water Conference, Minneapolis, MN, October 1-3, 2012.
• Steward, D. R., Interdisciplinary water approaches fusing disciplinary knowledge, 3rd Water Research Horizon Conference, Helmholtz Institute, Berlin, Germany, July 10-11, 2012.
• Steward, D. R., Modeling and forecasting a groundwater dominated ecosystem, University of Nebraska, Spring 2012 Water Seminar Series and Surface & Groundwater Modeling Subseries, Lincoln, NE, April 11, 2012.
• Steward, D. R., A conceptual groundwater data model for The Netherlands and the EU, Deltares, Utrecht, The Netherlands, March 9, 2009.
• Steward, D. R., EcoHydroGeological studies and analytic mathematical and computational modeling tools, Wageningen University, The Netherlands, May 22, 2008.
• Steward, D. R., Groundwater ecohydrology and GIS support, Recent Advances in Water Resources, 41th Colloquium, Delft Technical University, The Netherlands,May 8, 2008.
• Steward, D. R., Groundwater eco-hydrological interactions, Hydrology Colloquim Series, Utrecht University, The Netherlands, April 28, 2008.
• Steward, D. R., Yang, X., de Lange, W. J., Lauwo, S. L., Bernard, E. A. and Chubb, R. M., A Conceptual groundwater data model, ArcGIS Groundwater Data Model Workshop, ESRI, Redlands, CA, Dec. 14-15, 2006.
• Steward, D. R., Putting the GIScience in groundwater, MODFLOW and More 2006, Golden, CO, May 22-24, 2006.
• Steward, D. R., Geospatial models of groundwater using the Analytic Element Method, SUNY: University at Buffalo, Amherst, NY, March 22, 2005.
• Steward, D. R., High Plains Aquifer hydrologic observatory, 2004 Fall American Geophysical Union Meeting, San Francisco, California, December 13-17, 2004.
• Steward, D. R., Groundwater studies – Kansas State experiences, Institute of Engineers (India), Andhra Pradesh State Centre, Hyderabad, India, January 22, 2004.
• Steward, D. R., Scientific support for groundwater management decisions through coupled models, MODFLOW and MORE 2003: Understanding through Modeling, Golden, CO, September 17-19, 2003.
• Steward, D. R., Analytic techniques for three-dimensional steady flow with two-dimensional and axisymmetric components, XIV International Conference on Computational Methods in Water Resources, Delft University of Technology, The Netherlands, June 23-28, 2002.
• Steward, D. R. and Le Grand, P., An analytic element markup language, Amsterdam Water Supply, Vogelenzangseweg, The Netherlands, June 23, 2002.
• Steward, D. R., Developing understanding of horizontal wells using an analytic model, MODFLOW 2001 and other Modeling Odysseys, Golden, CO, September 11-14, 2001.
• Graillot, D. and Steward, D. R., La modelisation analytique 3D en hydrogeologie, Journee Recherche 2001, Ecole doctorale de Saint-Etienne, France, March 23, 2001.
• Steward, D. R., Analytic Techniques in Three-Dimensional Groundwater Flow, SITE Departmental Seminar, Ecole des Mines, Saint-Etienne, France, March 22, 2001.
• Steward, D. R., Panel discussion, Recent Advances in Subsurface Hydrology, 15^th Colloquium, Delft University of Technology, The Netherlands, Department of Civil Engineering and Geosciences, Section of Hydrology and Ecology, November 12, 1999.
• Steward, D. R., Stream surfaces, Recent Advances in Subsurface Hydrology, 12^th Colloquium, Delft University of Technology, The Netherlands, Department of Civil Engineering and Geosciences, Section of Hydrology and Ecology, June 1, 1999.
• Steward, D. R., Analytic computer program demonstration, KIWA, N.V., The Netherlands, May 26, 1999.

Regional

• Steward, D. R., Preparing for Civil Engineering Successes, ASCE Joint Banquet: Bob Thorn Lecture Series, November 6, 2017.
• Steward, D. R., Geology: A Groundwater Reservoir for Times of Need, Geology Seminar, Kansas State University, Department of Geology, September 1, 2016.
• Steward, D. R., Educating the next generation of groundwater resources engineers and scientists at Kansas State University, Meadowlark Hills Retirement Community, KSU Center on Aging, Manhattan, KS, April 14, 2016.
• Steward, D. R., Manhattan Konza Rotary Program, Manhattan, KS, April 24, 2015.
• Steward, D. R., Kiwanis, luncheon speaker, Manhattan, KS, January 12, 2015.
• Steward, D. R., Groundwater in the Ogallala Aquifer and Agricultural Production, League of Women Voters, Topeka, KS, April 1, 2014.
• Steward, D. R., Predicting the Future of the Ogallala Aquifer, Kanza Coop Board Retreat, Kansas City, KS, January 18, 2014.
• Welch, S. M. and Steward, D. R., KSU Study Model of Extending the Life of the High Plains Aquifer, Servi-Tech Professional Development Conference, Kearney, NE January 8, 2014.
• Steward, D. R., The role of a land-grant university in addressing societal water problems, Division of Water Resources, KS Department of Agriculture, Topeka, KS, May 4, 2010.
• Steward, D. R., Aquifer depleted, rising in some parts, Clay Center Lion’s Club, Clay Center, KS (written up in Clay Center Dispatch), March 30, 2010.
• Steward, D. R., Water resources and policy in the Central Plains, Kansas Environmental Leadership Program, Hays, KS, January 6, 2010.
• Steward, D. R., Groundwater ecohydrology studies, methods and results in Kansas and abroad,  Professional Development Lecture Series, Kansas Water Office, Topeka, KS, April 28, 2009.
• Steward, D. R., Water resources in Kansas, League of Women Voters, September 9, 2008.
• Steward, D. R., Water resources and human society, Manhattan Solar Kiwanis, Manhattan, KS, October 22, 2007.
• Steward, D. R., Peterson, J. M. and Bernard, E. A., A coupled hydrologic-economic modeling tool to support groundwater management decisions, 21^st Annual Water and the Future of Kansas Conference, Lawrence, KS., March 11, 2004.
• Steward, D. R., Guest speaker, "Live from broadcast square" with Delvin Kinser, KSCB, Liberal, KS, 9-9:30AM, October 29, 2003.
• Steward, D. R. and Peterson, J. M., Coupled groundwater/economic model, Kansas Water Authority, Data and Research Committee, Pratt, KS, April 9, 2003.
• Steward, D. R., Recent developments in modeling subsurface flow, USGS Seminar Series, Lawrence, KS, January 10, 2002.
• Steward, D. R., Using a two-dimensional model to simulate a three-dimensional flow, Petrophysics Seminar Series, Kansas Geological Survey, Lawrence, KS, April 21, 1999.