1. Graduate Student, Dept. of Civil Engineering, Univ. of Kentucky, 161 Raymond Building, Lexington, KY 40506.
2. Associate Professor, Dept. of Civil Engineering, Univ. of Kentucky, 161 Raymond Building, Lexington, KY 40506.
3. Director, Kentucky Water Resources Research Institute, Univ. of Kentucky, 233 Mining and Minerals Resource Building, Lexington, KY 40506 (corresponding author).