1. Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Houston, Houston, TX 77204 (corresponding author). E-mail: cleveland@uh.edu
2. Director of Civil Engineering for Hydrology and Hydraulics, R.O. Anderson, Inc. E-mail: dthompson@roanderson.com
3. Professor, Dept. of Civil Engineering, Lamar Univ., Beaumont, TX 77710. E-mail: xing.fang@lamar.edu
4. Doctoral Candidate, Dept. of Civil and Environmental Engineering, Univ. of Houston, Houston, TX 77204. E-mail: hexinbit@hotmail.com