1. Research Scientist, Dept. of Civil and Environmental Engineering, Engineering Research Center, Colorado State Univ., Fort Collins, CO 80523 (corresponding author).
2. Associate Professor and Hydraulic Laboratory Director, Dept. of Civil and Environmental Engineering, Engineering Research Center, Colorado State Univ., Fort Collins, CO 80523.
3. Emeritus Professor, Dept. of Civil and Environmental Engineering, Engineering Research Center, Colorado State Univ., Fort Collins, CO 80523.