1. Center for Natural Resources Development and Protection, Dept. of Civil and Environmental Engineering, College of Engineering, Temple Univ., 1947 12th St., Philadelphia, PA 19122.
2. Assistant Professor, Notre Dame Univ.-Louaize, Dept. of Civil and Environmental Engineering, Faculty of Engineering, Zouk-Mosbeh-Lebanon.
3. School of Water Resources and Environmental Science, China Univ. of Geosciences-Beijing, Beijing 100083, China; formerly, Center for Natural Resources Development and Protection, Dept. of Civil and Environmental Engineering, College of Engineering, Temple Univ., 1947 12th St., Philadelphia, PA 19122.
4. Professor, Center for Natural Resources Development and Protection, Dept. of Civil and Environmental Engineering, College of Engineering, Temple Univ., 1947 12th St., Philadelphia, PA 19122 (corresponding author).