[1] Univ Cassino & Southern Lazio, Dept Civil & Mech Engn, Via Di Biaslo 43, I-03043 Cassino, FR, Italy
[2] Univ Naples Federico II, Dept Civil Architectural & Environm Engn, Via Claudio 21, I-80125 Naples, Italy
[3] Univ Naples Federico II, Dept Math & Applicat Renato Caccioppoli, Via Cintia, I-80126 Naples, Italy
[4] Inst Water Educ, UNESCO IHE, POB 3015, NL-2601 DA Delft, Netherlands