QUALIDADE FÍSICO-QUÍMICA DA ÁGUA DA BACIA NO ALTO DO RIO PARANÁ/GO

Abstract

In the present dissertation, we evaluated some factors which influence water quality in the high of the river Paraná basin, in the state of Goiás, where there is predominance of agricultural and cattle raising activities. Data was collected in 31 properties in the towns of Piracanjuba, Morrinhos, Goiatuba, and Itumbiara. Therefore, this research aimed at determining and evaluating the physicochemical parameters (temperature, dissolved oxygen, turbidity, conductivity, pH, nitrate, total sulfate, and phosphorus) to may from September 2009 (dry period). We analyzed the physicochemical variables, such as temperature, dissolved oxygen, conductivity, turbidity, and pH in loco and the total sulfate, phosphorus, and nitrate were verified at the Chemistry laboratory at PUC-GO. The statistics for water temperature, dissolved oxygen, and pH showed proximity among data in the longitudinal profile, with low dispersion (standard deviation and coefficient of variation). The dispersion for conductivity, turbidity, nitrate, sulfate, and phosphorus were highlighted as more expressive in Piracanjuba, Morrinhos and Itumbiara. Regarding nitrate and sulfate, all points of collection were observed as normal, and regarding phosphorus, the results showed that all points of collection are, in average, above the maximum value allowed by legislation.