Análise do índice de estado trófico do reservatório Pereira de Miranda, Ceará, para o período 2012-2016

Abstract

The crisis of water resources in the context of the semi-arid region of Ceará is denoted by water shortage and deterioration of water quality. In this sense, this study aims to evaluate the water quality and the environmental conditions of the Pereira de Miranda Reservoir in the city of Pentecoste, Ceará, for the period between 2012 and 2016 through the Trophic State Index, considering the parameters total phosphorus and chlorophyll “a”, in addition to the cyanobacteria count. For the period between 2012 and 2016, regardless of the methodology utilized, the reservoir has presented low trophic levels, especially when the method is more comprehensive and sensitive. The water shortage that the state of Ceará faced, especially between 2012 and 2016, kept the reservoir volume at levels of concern; besides, anthropogenic activities along the Curu watershed are considered responsible for the process of eutrophication of the reservoir. Therefore, the management of water resources aims to ensure water in quantity, availability and quality to the population for its various purposes.