This paper regards the relationship between soil cover and the occurrence of erosional features, aiming to contribute towards the understanding of the environmental characterization of the area. During the last thirty years there has been an intense land degradation due to the forest clearing.

The methodology encompassed field work, where the linear erosional features were mapped and the soils were also identified. Soil samples were collected to be analysed in the laboratory. Photointerpretation was carried out using satellite images and aerial photographs, together with topographie maps (1:100,000 scale).

The study area is in the dissected landforms of the low Amazonian Plateaux Domain. The main rock types are: argillaceous sandstone(Itapecuru Formation) and white and pinkish red sandstone (Barreiras Formation).The climate presents a tropical regime with two distinct seasons: dry and wet seasons.

The classified soils are: Latosols (Red-Yellow and Yellow), Red-Yellow Podzolics, intergrades between those two types, Cambisols, Aluvium Soils and Hydromorphic Soils.

Regarding the occurrence of the mapped erosional features, they are found in all types of soils, except those situated on the floodplain and terraces. However, these features always occur in mediun textured soils, tending to sandy soils.

Those soils with clayey and very clayey texture do not present linear erosional features. However, those soils are not dominant in the area. The total sandy content ranges between 40% and 87% being 64% the average. They regard the medium textured soils.

The fine sandy dominates the coarse fraction, which represents a higher erosional risk. Soil samples collected inside the gullies show a higher coarse fraction, which leads us to believe that the fines were transported to the gully outlet by the concentrated water flow, outlining the land degradation in the area.