1. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 Lancaster Ave., Villanova, PA 19010.
2. Water Resources Engineer, McCormick Taylor, 509S. Exeter St., Baltimore, MD 21202.
3. Professor, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 Lancaster Ave., Villanova, PA 19010.
4. Associate Professor, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 Lancaster Ave., Villanova, PA 19010 (corresponding author).