1. Department of Civil Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile
2. Center for Water Resources in Agriculture and Mining, CRHIAM, P.O. Box 160-C, Concepción 4030000, Chile
3. Department of Chemical Engineering, Universidad de Concepción, P.O. Box 160-C, Concepción 4030000, Chile