Lógica fuzzy como ferramenta para avaliação da degradação ambiental em rios: relação entre os parâmetros DBO/OD

Abstract

Based on mass transfer phenomena, fuzzy logic developed in this study established relations between the Biochemical Oxygen Demand (BOD) and Dissolved Oxygen (DO), for different releases. The application of fuzzy logic in this scenario allowed the evaluation of uncertainty variables involved in the process, specifically in the solution of advection equation, and the investigation of the contamination risk of a water system before the release of pollutants. In developing of fuzzy logic parameters, BOD / DO were converted into a set of differential equations represented as relevance functions. For water quality simulations, the authors used a computer program coded in FORTRAN. According to the results, it was concluded that the combination of the Theory of Mass Transport and the fuzzy logic could be an important tool for the assessment of risk analysis in water systems, greatly contributing to the monitoring of this priority theme of Environmental Engineering.