Avaliação da qualidade da água e autodepuração do ribeirão do meio, Leme (SP)

• Autor(a) principal: de Souza Sardinha, Diego [UNESP]
• Data de Publicação: 2008
• Outros Autores: Tomazini da Conceicao, Fabiano [UNESP], Goncalves de Souza, Antonio Donizetti, Silveira, Alexandre, de Julio, Marcelo, de Souza Inacio Goncalves, Julio Cesar
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1590/S1413-41522008000300013; http://hdl.handle.net/11449/25216
• topic: Water quality; anthropogenic influences; auto-purification mathematical modeling; environmental management

This investigation utilized hydrochemical relations to evaluate possible anthropogenic inputs at Meio Stream, São Paulo State. Realized three sampling of water during the months of February, April and July/2005, in five sampling points analyzing: discharge, temperature, turbidity, pH, electrical conductivity (EC), dissolved oxygen ( DO), TDS (total dissolved solids), TSS (total suspended solids), Ca(2+), Mg(2+), Na(+), K(+), HCO(3)(-), Cl(-), SO(4)(2-), PO(4)(3-) and NO(3)(-). The characteristics of water close to spring until Leme city allow concluding that there is a small interference in its quality, however the absence of treatment of domestic wastewater at Leme city reduced its quality. It was applied the QUAL 2K modeling to evaluate the Meio Stream auto-purification identified the auto-purification zones and indicated the necessity of secondary wastewater treatment, with 76% of efficiency.