1. Formerly, Master of Science Student, Dept. of Applied Engineering and Water Resources, Universidad Autónoma de Zacatecas, Zacatecas, ZAC 98000, Mexico.
2. Research Hydraulic Engineer, US Arid Land Agricultural Research Center, 21881 N. Cardon Lane, Maricopa, AZ 85138 (corresponding author).
3. Professor, Dept. of Applied Engineering and Water Resources, Universidad Autónoma de Zacatecas, 801 Ave., Ramón López Velarde, Zacatecas, ZAC 98000, Mexico.
4. Supervisory Soil Scientist, US Arid Land Agricultural Research Center, 21881 N. Cardon Lane, Maricopa, AZ 85138.