1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Colorado State Univ., Campus Delivery 1372, Fort Collins, CO 80523.
2. Faoro Professor of Water Resources, Dept. of Civil and Environmental Engineering, Colorado State Univ., Campus Delivery 1372, Fort Collins, CO 80523 (corresponding author).
3. Research Hydrologist, Center for Agricultural Resources Research, Agricultural Research Service, USDA, 2150-D Center Ave., Fort Collins, CO 80526.
4. Senior Research Scientist, Cooperative Institute for Research in the Atmosphere, Colorado State Univ., 1375 Campus Delivery, Fort Collins, CO 80523.
5. Operations Research Analyst, US Army Research Development, and Engineering Command, Army Research Laboratory, 2800 Powder Mill Rd., Adelphi, MD 20783.