Aplicação da teoria fuzzy nos modelos de DBO-OD para calcular o risco de contaminação no Rio Potengi, no Estado do Rio Grande do Norte

Abstract

This research concerns of the application of the fuzzy theory in the pollutant transport models of pollutant, to study the risk of environmental degradation in the Potengi river, near to the city of Natal, in the state of Rio Grande do Norte. In such away, the DBO-OD model is transformed in a new one, with characteristic of fuzzy model, that once resolved, it allows to determine the distribution of the concentration of OD, along the river in study. It is important to mention that, in this case, this concentration distribution is calculated in form of membership functions, so that it is possible to determine the calculation of the environmental risk in all extension of the river. The results showed that rivers as Potengi, has its capacity of auto depuration that depends on the period of the year, in function of the hydrological conditions of its watershed, and that the fuzzy theory can become an important tool in the determination of the environmental risk in bodies of water.