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.