1. Researcher, Research Group on Development Cooperation and Human Development (GRECDH), Universidad Politécnica de Catalunya (UPC); and Water and Sanitation Coordinator, Ingeniería Sin Fronteras-ApD, C/Cristóbal Bordiú, 19-21.4º D., 28006 Madrid, Spain (corresponding author).
2. Professor, Universidad Politécnica de Catalunya (UPC); and Senior Researcher, Research Group on Development Cooperation and Human Development (GRECDH), C/ Jordi Girona 1-3, C2-206, ETSECCPB, MA3 Department, Campus Nord UPC, 08034 Barcelona, Spain.