1. Water Resources Engineer, Tetra Tech, Inc., 9444 Balboa Avenue, Suite 215, San Diego, CA 92123 (corresponding author).
2. Extension Associate, Dept. of Biological and Agricultural Engineering, North Carolina State Univ., Campus Box 7625, Raleigh, NC 27695.
3. Associate Professor and Extension Specialist, Dept. of Biological and Agricultural Engineering, North Carolina State Univ., Campus Box 7625, Raleigh, NC 27695.