1. Associate Professor, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136 (corresponding author).
2. Postdoctoral Research Fellow, Water Resources Research Dept., Korea Institute of Construction Technology, Goyang, Gyeonggi-Do, Korea; formerly, Graduate Student, Zachry Dept. of Civil Engineering, Texas A&M Univ., College Station, TX 77843-3136.
3. Associate Professor, Disaster Prevention Research Institute, Kyoto Univ., Uji 611-0011, Japan.