1. Senior Research Scientist, Environmental Fluid Mechanics Laboratory, Stanford Univ., Stanford, CA 94305-4020.
2. Professor, Environmental Fluid Mechanics Laboratory, Stanford Univ., Stanford, CA 94305-4020.
3. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of California, Berkeley, Berkeley, CA 94720-1710.
4. Hydrologist, U.S. Geological Survey, Sacramento State Univ., Placer Hall, 6000 J St., Sacramento, CA 95819-6129.