1. Associate Professor of Geotechnics, Dept. of Civil Engineering, Univ. of Rome “Tor Vergata,” Via del Politecnico 1, 00133 Rome, Italy.
2. Associate Professor of Hydraulic Construction, Dept. of Civil Engineering, Univ. of Rome “Tor Vergata,” Via del Politecnico 1, 00133 Rome, Italy (corresponding author).
3. PhD Student in Environmental Engineering, Dept. of Civil Engineering, Univ. of Rome “Tor Vergata,” Via del Politecnico 1, 00133 Rome, Italy.