1. Assistant Professor and Department Coordinator, Environmental Engineering Dept., College of Engineering, Al Mustansiriya Univ., Baghdad 10047, Iraq.
2. Professor and Orville L. and Helen L. Buchanan Chair, Dept. of Biosystems and Agricultural Engineering, Oklahoma State Univ., 120 Ag Hall, Stillwater, OK 74078 (corresponding author).
3. Retired, USDA-ARS Hydraulics Laboratory, 1301 N. Western, Stillwater, OK 74075.
4. Director, Oklahoma Infrastructure Consortium, School of Civil and Environmental Engineering, Oklahoma State Univ., 207 Engineering South, Stillwater, OK 74078.
5. Associate Professor, School of Civil and Environmental Engineering, Oklahoma State Univ., 207 Engineering South, Stillwater, OK 74078.