1. Department of Hydraulic and Sanitary Engineering, Sao Carlos School of Engineering, University of Sao Paulo, Av Trabalhador São-carlense 400, Sao Carlos SP, Brazil E-mail: tatianna@sc.usp.br; ecpires@sc.usp.br
2. Department of Hydraulic and Sanitary Engineering, Centre of Water Resources and Applied Ecology—CRHEA, Sao Carlos School of Engineering, University of Sao Paulo, Brazil E-mail: claricebotta@gmail.com