Papadopoulou Lefkothea
James J Riley, PhD
Associate Professor Emeritus
  • Department of Soil, Water and Environmental Science
    The University of Arizona
    Tucson, Arizona,USA
    Phone: (520) 591-4019



Ph.D. , Hydrology,

The University of Arizona


M.S., Meteorology,

The University of Arizona


B.S., Mathematics

The University of Arizona




I have spent the greater part of my professional career in the administration of international agricultural research and development programs outside the United States. I have served as Director of the Arid Lands Research Center in Abu Dhabi, Associate Director of the Asian Vegetable Research and Development Center in Taiwan, Senior Advisor to the Director General for Agriculture Research in Sudan, and Representative of the University of Arizona on Halophyte Research in the United Arab Emirates, Kuwait and Saudi Arabia.

I have a keen interest in teaching, particularly in conveying some of the lessons learned in my diverse international experience to students interested in international agriculture.

Research Interest

My current research focuses on improving water management and conservation in arid lands. In particular I am working on rainwater harvesting as an important source of water and halophyte irrigation as a means of utilizing brine streams from power plants and desalting plants.

Scientific Activities:

  • Associate Professor, Soil, Water and Environmental Science Department, The University of Arizona, Tucson, AZ, July 1998- present
  • Senior Research Scientist, Environmental Research Laboratory (ERL), The University of Arizona, Tucson, AZ, July 1990-2008
  • Resident consultant on seawater agriculture to the Royal Commission for Jubail and Yanbu, Jubail, SAUDI ARABIA, May-June & Sept.-Dec. 1991
  • Halophyte Consultant, Kuwait Institute for Scientific Research (on assignment with ERL) Kuwait City, KUWAIT, August 1988-June 1990
  • Representative, ERL, Kalba, Sharjah, UNITED ARAB EMIRATES, October 1987-July 1988
  • Coordinator of International Programs, Environmental Research Laboratory, The University of Arizona, Tucson, AZ, 1986-July 1988
  • Special Water Resources Consultant, Western Sudan Agricultural Research Project, Khartoum, SUDAN, April 1985-August 1985
  • Senior Advisor to the Director General, Agricultural Research Corporation, Khartoum, SUDAN, July 1980-April 1985
  • Professor, Washington State University, Pullman, WA, July 1980- August 1985
  • Associate Director (Research) Asian Vegetable Research and Development Center,
  • Shanhua, Taiwan, CHINA, July 1974-June 1980
  • Project Leader, Aquaculture Program, Environmental Research Laboratory, The University of Arizona, Tucson, AZ, 1972-1974
  • Director, Arid Lands Research Center, ABU DHABI, 1970-1972
  • Assistant Director, Arizona Water Resources Research Center, The University of Arizona, Tucson, AZ, 1968-1969



  1. Battan, L. J. and J. J. Riley, 1960, Ice-crystal nuclei and maritime air. J. Meteor. 17:675-676.
  2. Riley, J. J., 1966, The heat balance of class A. evaporation pan. Water Resources Research, 2:223-226.
  3. Goh, B. S., W. Y. Peng, T. L. Vincent, J. J. Riley, 1975, Optimal management of greenhouse crops, HortScience, Volume 10, No. 1 (February).
  4. Riley, J. J. and M. R. Menegay, 1978, Intensive Agricultural Practices in Asia, J. of Food Processing and Preservation, 2:197-203, Food & Nutrition Press Inc., Westport, Conn.
  5. Riley, J.J., N.G. Hicks and T.L. Thompson, 1992, Effect of Kuwait oil field fires on human comfort and environment in Jubail, Saudi Arabia, Int. J. of Bio-Meteorology, 36: 36-38
  6. Riley, J.J., N.G. Hicks and T.L. Thompson, 1992, Response of solar radiation in Jubail, Saudi Arabia, to smoke from oil field fires in Kuwait. Int. J. of Bio-Meteorology, 36: 176-177
  7. Riley, James J. and Mahdi Abdal, 1992  Preliminary evaluation of Salicornia production and utilization in Kuwait. Published IN: Towards Rational Use of High Salinity Tolerant Plants" v 1 Deliberations about high salinity tolerant plants and ecosystems. H. Lieth& A. Al Massoum, (Eds.). Kluwer Acad. Publ., Dordrecht, The Netherlands.
  8. Watson, M.C., G.S. Banuelos, J.W. O'Leary, and J.J. Riley, 1994, Trace element composition of Atriplex grown with saline drainage water. Agriculture, Ecosystems & Environment, 48 (1994) 157-162.
  9. Riley, J.J., E.P. Glenn and C. Mota U., 1994, Small ruminant feeding trials on the Arabian Peninsula with Salicornia bigeloviiTorr. IN: Halophytes as a resource for livestock and for rehabilitation of degraded lands.  pp273-276.  V.R. Squires & A.T. Ayoub (eds). Kluwer Academic Publishers.
  10. Glenn, E.P., R.S. Swingle, J.J. Riley, C.U. Mota, M.C. Watson & V.R. Squires, 1994, North American halophytes: Potential use in animal husbandry. IN: Halophytes as a resource for livestock and for rehabilitation of degraded lands. pp165-174. V.R. Squires & A.T. Ayoub (eds.). Kluwer Academic Publishers.
  11. Swingle, R.S., E.P. Glenn & J.J. Riley, 1994, Halophytes in mixed feeds for livestock. IN: Halophytes as a Resource for Livestock and for Rehabilitation of Degraded Lands. pp97-100. V.R. Squires & A.T. Ayoub (eds.). Kluwer Academic Publishers
  12. Glenn, E., T.L. Thompson, R. Frye, J. Riley and D. Baumgartner, 1995, Effect of salinity on growth and evapotranspiration of Typhadomingensis Pers., Aquatic Botany 52 (1995) 75-91
  13. Glenn, E., N. Hicks, J. Riley and S. Swingle, 1995, Seawater Irrigation of Halophytes for Animal Feed. Chapter 11 IN: Halophytes and Biosaline Agriculture (R. Choukr-Allah, C.V. Malcolm, and A. Hamdy, Eds) Marcel Dekker, Inc. New York.
  14. Riley, J., 1997, Revitalizing an Introductory Laboratory Course in Environmental Science -- Taking Student Opinion Into Account., NACTA Journal, March 1997, pp24-29.
  15. Riley, J.J., K.M. Fitzsimmons, and E.P. Glenn, 1997, Halophyte irrigation: an overlooked strategy for management of membrane filtration concentrate, Desalination, 110, pp 197-211.
  16. Hartstone, L.C., J. Knight, and J.J. Riley, 2006. Water in Tanzania: A role for Extension submitted to Journal of the Association for International Agricultural Extension and Education.
  17. Riley, J.J. et al. 2008. Viewpoints, Experts (12) address the question, "What are the most important constraints to achieving food security in various parts of Africa?" Natural Resources Forum 32 (2008) 163-166
  18. Jordan, F.L., R. Seaman, J.J. Riley, and M.R. Yoklic, 2008.  Effective Removal of Microbial Contamination from Harvested Rainwater Using a Simple Point of Use Filtration and UV-Disinfection Device.  Accepted for Publication in Urban Water.
  19. Riley, J.J.2015. Review of Halophyte Feeding Trials with Ruminants, Chapter11,pp: 177- 17/IN: Halophytic and Salt-Tolerant Feed stuffs, Impacton Nutrition, Physiology and Reproduction of Livestock/editors: Hassan M. ElShaer and Victor R.Squires.


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