Estudo da variação espaço-temporal da qualidade das águas, de um trecho do rio Bodocongó (PB).

Abstract

This work studied a segment of Bodocongó river from the Wastewater Treatment Plant of Campina Grande, Paraiba State - Brazil to its mouth in Paraiba River. Water quality was determined in monthly samples from 25/10/96 to 23/10/97 taken during dry and wet seasons. Bodocongó River is the only superficial water source for the local population being used for multiple purpose such as domestic (clothes and plate washing, bathing), animal use but mainly for crop irrigation. It is a intermittent river and during dry season becomes perennial due to the contributions of the Wastewater Treatment Plant final effluents and ali raw sewage discharged into the Campina Grande macro drainage system. Results from physico-chemical, microbiological and ions (anions and cations) analysis were used to quantify the degree of water pollution in the chosen segment river in order to evaluate the compatibility among water quality and its actual use. Soil salinization and some aspects of Public Health were also considered. In both seasons the high concentration of fecal coliforms classified river water in Class 4 (CONAMA Standards 20/86) being unsuitable for ali actual uses and not appropriate for irrestricted irrigation specially when used on crops to be eaten raw. River water belonged to C3 class imposing high risk for soil salinization.