1. Hydraulic Engineering and Sanitation, University of São Paulo, Av. Trabalhador Saocarlense, 400 CP 359 São Carlos, SP CEP 13566-590, Brazil
2. University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA
3. University of São Paulo, Av. Trabalhador Saocarlense, 400 CP 359 São Carlos, SP CEP 3566-590, Brazil