1. Professor Emeritus, BioResource and Agricultural Engineering Dept., California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA 93407.
2. Director, Irrigation Training and Research Center (ITRC), Cal Poly, San Luis Obispo, CA 93407.
3. Senior Water Resources Engineer, ITRC, Cal Poly, San Luis Obispo, CA 93407.