Evaluation seasonal Waters reservoir of hydroelectric power plant Caçu in the municipality of Caçu, Goiás

Abstract

The reservoir of the Hydroelectric Power Plant (HPP) of Caçu is located in the watershed of the Rio Claro, Southwest region of the state of Goiás. The objective of this study was to evaluate the water quality of the reservoir HPP Caçu in different periods of the Brazilian Cerrado, and perform the measure of the water body, according to CONAMA Resolution 357/05. The physical and chemical parameters evaluated were electrical conductivity, dissolved oxygen, pH (Potential hydrogenionic), water temperature, total dissolved solids and turbidity. The data collections of sample points were taken on days 17/01/2012, 10/07/2012, 23/01/2013 and 07/30/2013. The results were discussed and compared based on limits set by the environmental agency CONAMA Resolution Nº 357 on, March 17, 2005. The results were evaluated for conformity being checked points that fall within Classes 1, 2 and 3; only a few points and some variables fall into in the class 4. In general, current conditions have good water to use and watering livestock, according to the points sampled and analyzed. According to the data evaluated, the waters of the reservoir HPP Caçu can be classified as turbidity, in classes 3 and 4 for the river stretch, stretch class 2 for the transition, and the first class to stretch Lake, in the period from January 2013. The other variables, identical set individual limits for all classes of freshwaters.