Assessment of the Water Quality of the Mirim Lagoon and the São Gonçalo Channel Through Qualitative Indices and Statistical Methods

The Mirim Lagoon is one of the most important freshwater lagoons in Brazilian territory, connecting Patos through São Gonçalo Channel. With diversification uses rivers, watersheds, and lakes, sustainable management these ecosystems are extremely relevant. For this reason, monitoring environments great importance. In view above, water quality index (WQI), trophic state (TSI), statistical methods tools that enable rapid assessment characteristics regarding pollution sources, expressing its a single value, which facilitates understanding. Thus, study aims to evaluate Channel methods. proposed methods, it was possible observe suffer strong influence from agricultural activities release untreated effluents into their beds, causing deterioration resources. Despite this, for part, collection points had good WQI TSI varying between ranges 1 3. Furthermore, importance assess studied parameters highlighted, since they promote more accurate results.