1. Water Resources Engineer, California Dept. of Water Resources, 1416 9th St., Sacramento, CA 95814.
2. Professor, Hydrologic Research Laboratory, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616.
3. Assistant Development Engineer, Hydrologic Research Laboratory, Dept. of Civil and Environmental Engineering, Univ. of California, Davis, CA 95616 (corresponding author).
4. State Climatologist, California Dept. of Water Resources, 3310 El Camino Ave., Suite 200, Sacramento, CA 95821-9000.
5. Associate Professor, Dept. of Environmental Engineering, Korea Univ., Jochiwon, Chungnam 339-700, South Korea.