1. Formerly, Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Western Univ., London, ON, Canada N6A 5B9 (corresponding author).
2. Professor, Dept. of Civil and Environmental Engineering, Western Univ., London, ON, Canada N6A 5B9.
3. Research Scientist, Geological Survey of Canada, Natural Resources Canada, 490, Rue de la Couronne, Quebec, QC, Canada G1K 9A9.