Potencialidade de imagem satélite no monitoramento de uso e cobertura da terra: estudo de caso - distrito da Maganja da Costa (Zambézia)

Abstract

The use of natural resources varies from one region to another, causing problems for the balance of the biosphere, the reduction of forest resources is justified by several causes, which distinguish mechanized and shifting agriculture, overgrazing, industrial forestry, search for a source energy and industrial development. With the advent of computers and the evolution of Remote Sensing and Geographic Information Systems (GIS) techniques, it is now possible to obtain detailed images for sophisticated studies to detect changes in natural resources, their monitoring as well as for forecasting and evaluation of future trends in its use.

The present work intends to identify and characterize the stages of land use and land cover in the district of Maganja da Costa, from 1996 to 2006, from the digital interpretation of Landsat 7 ETM+ satellite image, with the help of techniques Remote Sensing and Geographic Information Systems. The District of Maganja da Costa is located in the Center region of Mozambique, specifically in the extreme east of the province of Zambézia, with an area of ​​approximately 7,597 km, and comprises four administrative posts, with a population density of 37.1 inhabitants/km2. The study showed that from 1996 to 2006, there was a reduction in natural areas, as a result of human action in the intervention of the ecosystem, increasing the areas of agricultural practice and herbaceous vegetation (TRADUÇÃO NOSSA)