Desenvolvimento de uma metodologia, com base na teoria fuzzy, para o estudo do risco de eutrofização em reservatórios com estudo de caso no reservatório Acarape do Meio do estado do Ceará

Abstract

The processes of eutrophication in reservoirs become as an important problem in water quality to be studied by engineers, scientists and water managers. As it is known, in areas of scarcity, water storage is of fundamental importance to sustainable development, both from an economic standpoint, as the social point of view. Thus, acquiring knowledge that explains the main factors in eutrophication processes is a challenge. This work has as fundamental goal, the development of a methodology capable of studying the risk of eutrophication in a reservoir, based on Fuzzy Theory and the mechanisms used for the determination of the Modified Trophic State Index. In such way, it was used data from the Acarape do Meio Reservoir, in the State of Ceará, especially in the years 2001 to 2006, but in 2003 there were not field visits by the Company of Water Resources Management - COGERH. To calculate the risk it was used membership functions of the Modified Trophic State Index, transformed according to the rules of Fuzzy Numbers. The results show that for the years of observation, only in 2006 the reservoir water quality was in critical condition.