1. Professor Emeritus, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523 (corresponding author).
2. State Climatologist, California Dept. of Water Resources, 1416 9th St., Sacramento, CA 95814.
3. Assistant Professor, Dept. of Civil, Geological and Environmental Engineering, Univ. of Saskatchewan, 101-121 Research Dr., Saskatoon, SK, Canada S7N 1K2; Assistant Professor, Global Institute for Water Security, 101-121 Research Dr., Saskatoon, SK, Canada S7N 3H5.
4. Professor of Hydrology, Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, 46022 Valencia, Spain.