1. Water Resources Engineer, AECOM USA, Inc., 215 Union Blvd. Suite 500, Lakewood, CO 80228.
2. Professor, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523-1372.
3. Professor, Dept. of Civil and Environmental Engineering, Colorado State Univ., Fort Collins, CO 80523-1372 (corresponding author).