SUSCEPTIBILITY TO LAMINAR EROSION BETWEEN THE DRY AGRESTE AND THE MATA ÚMIDA ZONE: A CASE STUDY OF THE CANHOTO RIVER BASIN (PE/AL).

Abstract

Laminar erosion is one of the main processes of soil degradation, mainly because it is hardly noticeable. When dealing with erosion, it is important to emphasize that it is a natural environmental process, but it can be accelerated through human actions. In this sense, the aim of this work is to evaluate the natural susceptibility of soils to laminar erosion in hydrographic basins between the Agreste and Zona da Mata, through the case study of the Canhoto river basin (PE/AL). The methodology adopted used data on soil erodibility and slope to identify areas susceptible to laminar erosion, on a scale of 1:100,000. The results showed that more than 75% of the basin area was distributed between classes I and II, which are in the semi-arid area, presenting weaknesses from the point of view of the generation of erosive processes. There are high percentages of soils with high rates of erodibility and a great variability in the percentage of slope, resulting in areas susceptible to erosion, thus becoming an important object of study, given the need for research on this topic in the region.