1. M.Sc. Student, Dept. of Civil Engineering, Univ. of Qom, 3716146611 Qom, Iran.
2. Assistant Professor, Dept. of Civil Engineering, Univ. of Qom, 3716146611 Qom, Iran (corresponding author).
3. Professor, Dept. of Geography, Univ. of California, Santa Barbara, CA 93016-4060.