1. Researcher, DISTART e Costruzioni Idrauliche, Univ. di Bologna, Risorgimento 2, 40136 Bologna, Italy.
2. Assistant Professor, Dept. of Environmental and Civil Engineering, Florida Gulf Coast Univ., Fort Myers, FL, 33965; formerly, Researcher, Environmental Engineering Science, Univ. of Florida, Gainesville, FL 32611.
3. Professor, DISTART e Costruzioni Idrauliche, Università di Bologna, Viale Risorgimento 2, 40136 Bologna, Italy.
4. Professor, Environmental Engineering Science, Univ. of Florida, Gainesville, FL 32611 (corresponding author).