1. Associate Professor, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 East Lancaster Avenue, Villanova, PA 19085 (corresponding author).
2. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 East Lancaster Avenue, Villanova, PA 19085; presently, Ph.D. Student at INSTAAR, Dept. of Geography, Univ. of Colorado, UCB Box 450, Boulder, CO 80309.
3. Graduate Research Assistant, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 East Lancaster Avenue, Villanova, PA 19085; presently, Water Resources Engineer, Herrera Environmental Consultants, 2200 Sixth Avenue, Suite 1100, Seattle, WA 98121.
4. Professor, Dept. of Civil and Environmental Engineering, Villanova Univ., 800 East Lancaster Avenue, Villanova, PA 19085.