Simulação da concentração de matéria orgânica em canais urbanos - estudo de caso Canal do Prado em Campina Grande - PB.

Abstract

Urbanization, in the last decades, has caused numerous impacts on the population and the environment. These impacts were intensified by the lack of management and by the deficiency in the basic sanitation services that degraded the quality of water mainly of the water bodies that receive all the pollution generated in the urban centers. The urban drainage system enters this context by transporting the polluted rainwater to the springs. This pollution is caused by surface washing that carries pollutants deposited on the surface and mainly by the contributions of sewage that are released into the drainage system illegally. In this context, the objective of this work was to study the influence of these clandestine sewage contributions, in terms of organic matter, on the drainage system of the Prado canal, located in the city of Campina GrandePB. The methodology developed consisted of three stages, in the first the study area was delimited, in the second the characterization of the drainage system was carried out, assisted by onsite visits, where the mapping of the sewage entrances and the diagnosis of the system current drainage. In the third step, the simulations of the scenarios proposed by the Storm Water Management Model SWMM model were carried out. The results showed that the high concentrations of BOD and COD present in the canal waters indicate the large amount of organic matter present in the system and can be classified as domestic sewage. In the analysis of the proposed scenarios, it was noticed that removing the most critical inputs was obtained more significant results regarding the reduction of concentration and pollutant load values.