1. Associate Professor, Dept. of Civil Engineering and Computer Science Engineering, Univ. of Rome Tor Vergata, Via del Politecnico 1, 00133 Rome, Italy.
2. Researcher, Environmental and Maritime Hydraulic Laboratory (LIAM), Univ. of L’Aquila, Civil, Construction-Architectural and Environmental Engineering (DICEAA), P.le Pontieri, 1, Monteluco di Roio, 67040 L’Aquila, Italy (corresponding author).