2.5.3 Water Quality Graphics
The data were obtained in two periods, considered as treatments, being:T1 - data referring to the period BEFORE the working diagnosis and erosion control, considering the information from 2000 to 2007; andT2 - data referring to the period AFTER the working diagnosis and erosion control, considering the information from 2008 to 2018. The improvement in water quality was assessed by these indicators, which were tabulated and compared through graphics prepared for each indicator, for the T1 and T2 treatments (Figure 3).