Comparação do índice de qualidade de água de açudes localizados nas Bacias Metropolitana e Acaraú no Estado do Ceará

Abstract

Water pollution originates mainly from domestic sewage, industrial waste and agricultural farming that are mainly associated with utilization methods and occupation of the soil. The quality of water is indicated by means of analysis of physical, chemical and biological parameters. These include: pH, dissolved oxygen, biochemical oxygen demand, total phosphorus and nitrogen content, temperature, turbidity, total solids and fecal coliform, in accordance with the method developed by CETESB. Generally, the water quality index groups three broad categories of variables: physical, chemical and biological, whereby each group contains a larger number of significant sub-variables. This study evaluates the quality of water through calculation of the quality of water index taken at weirs located at the Metroplitan and Acaraú Basins in the state of Ceará. The indices show that the weirs have good quality of water