The soils are very stony and shallow Lithosols. The catchment (Fig. 3) is characterized by very steep slopes (> 20°), reflecting its location on the eastern flank of a quartzite ridge.
Figure 3. left) Prescribed fire in Vale Torto catchment on February 20th 2009 and right) view of the Vale Torto catchment near Góis, 4 months after the prescribed fire.