2.5 Water Quality Indicators (WQI)
The assessment of soil losses and sediment input to the river, due to the action of soil erosion, were evaluated by water quality indicators, which were, then, evaluated by Turbidity through the Standard Methods for the Examination of Water and Wastewater - 2130 B method (SMWW a). Suspended Solids were analysed according to the 2540 D method (SMWW b). The content in Phosphorus was analysed using the United States Environmental Protection Agency (EPA) 6010D method (USEPA), and the content in Organic Carbon through the 5310 C method (SMWW c), measured from periodic analyses of the Rio do Peixe water.