Variação espacial da erosão actual no município de Nacala

Abstract

The present work approaches the spatial differentiation of soil erosion in the Municipality of Nacala, in Nampula Province. The main objective of the research is to understand how erosion manifests itself and is distributed in space, and which factors influence this geographic distribution. To carry out the work, a bibliographic review, cartographic interpretation, interpretation of panchromatic aerial photographs of the study area and a field work to obtain additional information were carried out. Based on the SARCCUS model, the estimation of the magnitude of the current erosion in the urban, suburban and rural areas of the Municipality of Nacala was made. The study showed that erosion does not occur in all neighborhoods or places within the study area, given the heterogeneity of the manifestation of erosion factors. In places where erosion occurs, it is dynamized by the physical and natural conditions of these same places, which are prone to soil erosion (sharp relief, steep slopes, sandy soils without structure and weak vegetation cover). In addition to the physical and natural conditions, this situation is accentuated by human action, through its activities socio-economic factors. The survey also found that in areas affected by erosion, the magnitude of erosion is not homogeneous. Erosion is more worrying in suburban neighborhoods (Mocone, Triângulo, Ribaué, Muzuane and Matola) located on the western slope where severity levels range from moderate erosion to very severe erosion than in neighborhoods located in the central part, on the eastern slope and in the area urban.(TRADUÇÁO NOSSA)