ASPECTOS DA QUALIDADE DAS ÁGUAS DA MICROBACIA URBANA DO CÓRREGO ANDRESINHO (MUNICÍPIO DE ARARAS/SP)

Abstract

Data on hydrographic basin such as Mogi Guaçu river basin are being investigated and stimulated by the basin committees. However, projects involving a detailed study on water quality of rivers and microbasin inside urban areas are still scarce in Brazil. In this sense, the knowledge on water quality of Araras city, mainly near the Campus of Uniararas (Centro Universitario Herminio Ometto, Araras city, SP) was evaluated. Water samples were collected in 8 points across the rivers Andresinho and Veloso, during the dry and wet period of 2006. Physic-chemical variables were determined, such as: temperature, turbidity, pH, DO, DTS, conductivity, nutrients (total phosphate, total nitrogen, N-amoniacal, nitrite and nitrate), BOD, AND COD. The higher values of conductivity in the point 4 and BOD; COD and turbidity recommended to water of classes 2 and 3. These high levels may be related to action building in the Park Linear, located near the Andresinho River. Among the actions of the park building, there was soil turning over and take off the vegetation in order to reposition of molt and grass. So, alloctonous and autoctonous material entered and altered the water quality of the river and silting up part of the lake of the Ecological Park of the city. Key words: Urban River. Urban Park. Water Quality. Mogi-Guaçu River Basin. Araras City. Permanent Preservation Area. CLIMEP – Climatologia e Estudos da Paisagem Rio Claro – Vol.3 – n.1 – janeiro/junho/2008 – RESUMO/ABSTRACT