Utilização de métodos para a avaliação do índice de estado trófico de um açude no semiárido cearense

Abstract

The deficiency in the management of the use and occupation of the soil, allied to the growth of the population and the expansion of industry, have caused a decrease in the quality of the hydric resources, propitiating the eutrophication phenomenon, which represents a risk to the health and reduces the water quality in its several uses. The trophic state index (TSI) is a tool to evaluate the trophic state of a reservoir. This work used different methods to determine the TSI of the Banabuiú Weir from the methods of Carlson, Toledo et al., Lamparelli, Cunha, and Rolim, aiming to classify the water body. For this analysis, water quality data was collected from the Water Resources Management Company (COGERH), referring to the period from November 2014 to April 2019. Based on the chosen methods, the Banabuiú Reservoir was classified, respectively, as hypereutrophic, eutrophic, hypereutrophic, hypereutrophic, and eutrophic