Análise da qualidade da água por meio de sensoriamento remoto: estudo de caso Lagoa do Rio Ligeiro Pato Branco - PR

Abstract

The Southwest Region of Paraná, due to its location and geography, has an abundance of water resources. However, this important resource has been increasingly threatened by soil erosion, contamination from pesticides and fertilizers, and non-compliance with environmental regulations. Given the challenges and high costs of traditional water quality monitoring methods, this study proposes the use of Remote Sensing as an alternative for evaluating water quality parameters, such as biochemical oxygen demand (BOD), chemical oxygen demand (COD), dissolved oxygen (DO), total nitrogen (TN), total phosphorus (TP), and turbidity in a portion of the Pato Branco River. The analysis was conducted using Landsat 8–9 satellite images and two methods: Wang MA and Victorino (2023). The comparison between the Wang MA and Victorino models showed significant differences in their results, although both provided important contributions. For BOD, COD, and DO, the results were consistent with field data. However, for phosphorus, nitrogen, and turbidity, large discrepancies were observed between the methods and field measurements.