Dr. James J Riley is a Associate Professor in the Department of Soil, Water and Environmental Science at University of Arizona, USA. He had spent the greater part of his professional career in the administration of International agricultural research and development programs outside the United States. He received his Ph. D. in the department of Hydrology from The University of Arizona in 1968. Dr. James J Riley research interests includes improving water management and conservation in aridlands. In particular he is 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.