1. Researcher, Institute for Water Technology. Polytechnic Univ. of Valencia, P.O. Box 22012, 46071-Valencia, Spain.
2. Professor, Institute for Water Technology, Polytechnic Univ. of Valencia, P.O. Box 22012, 46071-Valencia, Spain.
3. Assistant Professor, Institute for Water Technology, Polytechnic Univ. of Valencia, P.O. Box 22012, 46071-Valencia, Spain.
4. Assistant Professor, Hydraulic Engineering, Dept. of Civil Engineering, Univ. of Coimbra, Largo D. Dinis, 3000 Coimbra, Portugal.