1. Graduate Student, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT 84322-4110.
2. Assistant Professor, Dept. of Landscape Architecture and Environmental Planning, Utah State Univ., Logan, UT 84322-4005.
3. Professor, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT 84322-4110 (corresponding author).