1. Professor Emeritus, Univ. of Arizona, Tucson, AZ.
2. Supervisory Research Hydrologist, Agricultural Research Service Hydrology and Remote Sensing Laboratory, Beltsville, MD.
3. Dean and Professor, Manhattan College, Riverdale, NY.
4. Retired; formerly, National Hydraulic Engineer, USDA–Natural Resources Conservation Service, Gaithersburg, MD.