Avaliação do Estado Trófico no trecho urbano do Córrego João Dias em Aquidauana- Mato Grosso do Sul

Abstract

The Trophic Status Index (TSI) is a classification system designed to classify water bodies into different degrees of trophicity, that is, it evaluates water quality in terms of nutrient enrichment and its effect related to excessive algae growth or increased infestation of aquatic macrophytes. Trophic State studies are important to help understand changes in the state of water quality in water bodies. In addition, these studies are capable of providing valuable data that demonstrate the variation in water quality indicators and trophic characteristics of these locations. The objective of this work was to evaluate the TSI in an urban section of the João Dias Stream, providing information on the degree of compromise of the system due to possible entrances of effluents originating from the urbanization process. Data regarding the Trophic State Index were collected in the urban section of the João Dias stream in Aquidauana- Mato Grosso do Sul, in the months of May and August 2021 and 2022 respectively, in six collection stations. The values of pH, electrical conductivity, alkalinity, total hardness, chloride, turbidity, dissolved oxygen, suspended material, total nitrogen, total phosphorus, used in the evaluation of the degree of trophicity in the sampling points through the State Index were analyzed in situ. Trophic. The results of this work demonstrate that the urban stretch of the stream studied is influenced by the urbanization process, classified as a hyper-eutrophic system in both years, with a higher TSI value in 2022 compared to the previous year, the stream is in the highest degree of trophy.