Modelagem do coeficiente de decaimento de fósforo para determinar o Índice de Estado Trófico (IET) do reservatório Banabuiú-CE

Abstract

Maintaining water quality in reservoirs is essential to ensure that demands are met to supply the population. Modeling the concentration of phosphorus is necessary to assist in the implementation of measures to prevent harmful effects on water quality, such as eutrophication. In this work, the phosphorus decay coefficient of the Banabuiú-CE reservoir was calibrated, which was used to model the Trophic State Index (TSI) from the concentration of total phosphorus and chlorophyll a. The values found using the decay coefficient of phosphorus k calibrated through the methodology exposed in this work were more representative than the equations present in the literature to estimate k through the residence time of water in reservoirs. The TSI found for the Banabuiú-CE reservoir during the analyzed period was predominantly hypereutrophic.