MODELAGEM DE QUALIDADE DE ÁGUA DO CÓRREGO DO SAPO EM RIO VERDE - GO

Abstract

Water is a natural resource of great importance for the preservation of life and economic development and has multiple uses. With population and economic development, they promote the excessive use of natural resources and decrease in quality due to the various activities that generate effluents, where most of them are released without treatments, which increases the organic matter load in the water body, affecting its quality. and its potential for self-purification. It is necessary to quantify some parameters to be able to measure the water quality of a water body, such as dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), among others. Mathematical modeling is a tool of great importance in the management of water bodies, where it has shown excellent results in the prognosis of water quality. The Córrego do Sapo cuts through the city of Rio Verde, is channeled and bordered by Avenida Paulo Roberto Cunha, a fact that makes it subject to occasional or diffuse pollution. This work aims to characterize and carry out the water quality modeling in the Córrego do Sapo basin from the modified QUAL-UFMG model, simulating the DO and COD, along the channeled stretch of the Córrego do Sapo. Analyzes of DO and COD were performed, in addition to measuring the flow of points contributing to the watercourse. Efficient calibration coefficients were applied, giving us a simulation of DO and COD for each 0.1 km of the section studied. With little variation in concentrations of OD and COD by the points of contribution of sewage due to its low flow rates, but being altered by its tributaries and the fact of the higher flow rates and hydraulic conditions. However results of highly polluted water body, with 84.6% of the stretch, being classified as class 4. Therefore, it needs more in-depth studies in its basin.