1. Graduate Student, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., Cookeville, TN 38505-0001.
2. Assistant Professor, Dept. of Civil and Environmental Engineering, Tennessee Technological Univ., 1020 Stadium Dr., Box 5015, Cookeville, TN 38505-0001 (corresponding author).
3. UNESCO Chair Water Resources Management and Culture, Univ. for Foreigners of Perugia, Via XIV Settembre snc, 06121 Perugia, Italy; and Honors Center of Italian Universities (H2CU), Sapienza Univ. of Rome, Via Eudossiana 18, 00184 Rome, Italy.