1. Postdoctoral Fellow, Dept. of Hydraulic and Sanitary Engineering, São Carlos School of Engineering, Univ. of São Paulo, Sao Carlos, SP, Brazil; presently, Civil Engineering Dept., Instituto Superior Técnico, Technical Univ. of Lisbon (TULisbon), Ave. Rovisco Pais, 1049-001 Lisbon, Portugal (corresponding author).
2. Assistant Professor, Civil Engineering Dept., Instituto Superior Técnico, Technical Univ. of Lisbon (TULisbon), Ave. Rovisco Pais, 1049-001 Lisbon, Portugal.
3. Professor, Dept. of Hydraulic and Sanitary Engineering, São Carlos School of Engineering, Univ. of São Paulo, C.P. 359, 13566-590 São Carlos, SP, Brazil.