1. Assistant Research Scientist, Dept. of Biological and Agricultural Engineering and Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX 77843-2117 (corresponding author).
2. Visiting Scientist, Dept. of Biological and Agricultural Engineering and Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX 77843-2117; and Hydraulics Division, Civil Engineering Dept., Istanbul Technical Univ., Istanbul, Turkey.
3. Caroline and William N. Lehrer Distinguished Chair in Water Engineering, Dept. of Biological and Agricultural Engineering and Dept. of Civil and Environmental Engineering, Texas A&M Univ., College Station, TX 77843-2117.