1. Research Hydraulic Engineer, USDA-ARS Arid Land Agricultural Research Center, 21881
N. Cardon Ln., Maricopa, AZ 85238 (corresponding author).
2. Research Hydraulic Engineer, USDA-ARS Arid Land Agricultural Research Center, 21881
N. Cardon Ln, Maricopa, AZ 85238.
3. Senior Hydraulic Engineer, West Consultants, Inc., 8950 S. 52nd St., Suite 210, Tempe,
AZ 85284-1043; formerly, Laboratory Director, USDA-ARS Arid Land Agricultural
Research Center.