1. Ph.D. student, Dept. of Civil Engineering, McMaster Univ., 1280 Main St. West, Hamilton, ON, Canada L8 S 4L7.
2. Professor, Dept. of Civil Engineering, School of Geography and Earth Sciences, McMaster Univ., 1280 Main St. West, Hamilton, ON, Canada L8 S 4L7.
3. Professor, Dept. of Civil Engineering, McMaster Univ., 1280 Main St. West, Hamilton, ON, Canada L8 S 4L7 (corresponding author).