1. Environmental Scientist, Ministry of Natural Resources and Environment, 10400, Thailand.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701 (corresponding author).
3. Professor, Dept. of Civil and Environmental Engineering, Univ. of Maryland, College Park, MD 20742.
4. Wisconsin Distinguished Professor and Chair, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706.
5. Professor Emeritus, Dept. of Civil and Environmental Engineering, Univ. of Wisconsin, Madison, WI 53706.