1. Graduate Student, Dept. of Biological Systems Engineering, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061 (corresponding author).
2. Associate Professor, Dept. of Biological Systems Engineering, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061.
3. Research Assistant Professor, Dept. of Civil and Environmental Engineering, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061.
4. Civil Engineer, General Directorate of State Hydraulic Works, Devlet Mahallesi, Inonu Bulvari No. 16, Cankaya, Ankara, Turkey.
5. Professor, Dept. of Biological Systems Engineering, Virginia Polytechnic Institute and State Univ., Blacksburg, VA 24061.