1. Department of Hydraulics and Sanitation, University of São Paulo (EESC-USP), 400 Trabalhador São Carlense Avenue, São Carlos, São Paulo 13566-590, Brazil
2. Department of Environmental and Civil Engineering, University of São Paulo State (FEB-UNESP), 14-01 ‘Engenheiro Luiz Edmundo Carrijo Coube’ Avenue, Bauru, São Paulo 17033-360, Brazil
3. LeAF, P.O. Box 500, 6700 AM Wageningen, The Netherlands