1. Graduate Student, Dept. of Civil and Environmental Engineering, Univ. of Western Ontario, London, ON, Canada N6A 5B9.
2. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Windsor, 335 Essex Hall, 401 Sunset Ave., Windsor, ON, Canada N9B 3P4 (corresponding author).
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Windsor, B07 Essex Hall, 401 Sunset Ave., Windsor, ON, Canada N9B 3P4.
4. Assistant Professor, Biological Systems Engineering Dept., Washington State Univ., LJ Smith 202, Pullman, WA 99164.