Avaliação da qualidade da água do ribeirão Taquaruçu durante o processo de implantação do Projeto Produtor de Águas

Abstract

The basin of the Taquaruçu creek, located in Palmas-Tocantins, has been suffering, in recent years, a sharp reduction of flow and at the same time, loss of water quality. In order to minimize these deficiencies, the basin entered a revitalization process through the implementation of the Water Producer Program, whose principle would be a financial reward through payments for environmental services. Due to the importance of a diagnosis in the water quality of creeks in the program five sampling stations were defined to perform monthly analysis of physicochemical and biological variables during the year 2014. The principal component analysis was applied and showed that during the rainy season, mainly in March, the five sampling stations presented a sharp correlation between the biochemical oxygen demand and dissolved oxygen. As for phosphorus, turbidity, total suspended solids and true color, high concentrations were recorded at the beginning and end of the rainy season, in almost every collection point. After examining the scenario, the results showed that the water quality of the basin has performed synergistic and susceptible to hydrological variations, mainly in the region of Lower Taquaruçu Grande, and the environmental reality of the region was crucial to the loss of water quality logged during the rainy season.