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Engenharia Sanitaria e Ambiental

versão impressa ISSN 1413-4152versão On-line ISSN 1809-4457

Resumo

SILVA, Maytê Maria Abreu Pires de Melo; FARIA, Sérgio Donizete  e  MOURA, Priscilla Macedo. Water quality modeling in the basin of the Piracicaba River (MG), Brazil. Eng. Sanit. Ambient. [online]. 2017, vol.22, n.1, pp.133-143. ISSN 1413-4152.  http://dx.doi.org/10.1590/s1413-41522017134420.

This paper aims to apply a model of water quality, the Sistema de Apoio à Decisão/Instituto de Pesquisas Hidráulicas (SAD-IPH), in the Piracicaba River basin. The quality parameters were modeled biochemical oxygen demand (BOD), dissolved oxygen (DO), total phosphorus, nitrogen and thermotolerant coliforms. The flow data were obtained through the application of the hydrological model Modelo de Grandes Bacias/IPH (MGB-IPH). The quality model was calibrated using data from stations monitoring the water quality of the Instituto Mineiro de Gestão das Águas (IGAM). The curves of BOD, DO and total phosphorus showed good adherence to data from monitoring campaigns. The parameters organic nitrogen, ammonia, nitrite, nitrate, and coliforms were underestimated by the model. Most streams have the quality of its waters compatible with Class 4. Current concentrations are well above what would be ideal for the basin, as its current framework is in Class 2.

Palavras-chave : hydrological model; water resources; water quality.

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