The Pereque watershed is localized between 24° 10' e 24° 30' South Lat., e 46° 18' e 42° 30' West Long., with 2,300 ha and altitude between 16 and 859m in the steep relief. The study aims to establish relations among the morphodynamic and geomorphology, geology, pedology, vegetation cover and slope using photointerpretation, field works and information crossing. Two hydro-biophysical macro sectors were obtained. One consists of the upland border and the steep relief where it has predominance of pinnacle tops with declivity above 25°, pronounced declivity rupture, abrupt changes of convex-rectilinear slope to rectilinear slope what shows important lithological and structural influence in the forms of relief compartment and erosion process distribution. There is strong degradation of the natural vegetation on the migmatitic rocks, not much resistant to the erosion process, that associated with the few deep soils (Inseptsol, Lithic entisol and rock) presents several types of forms with much concentration of landslides. The other macro sector consists of the convex tops with less density of landslides, declivity below 25°, degraded secondary vegetation and little degraded vegetation over soils more deep (oxisol). In the low and medium slopes with declivity less than 15°, sediment and debris accumulation occur what characterize changes of abrupt rectilinear slope to concave slope. Therefore, the "Serra do Cubatão" steep relief presents high erosion susceptibility, indicated by the hydro-biophysical components; the continuous degradation of the vegetation in the area causes apprehension due to the probable speedy reactivation of the landslides.