Conversion of land use and cover in northwest Amazon (Brazil)

Abstract

The increasing use of natural resources in a disorderly way has been demanding constant monitoring and ecological-economic zoning. The knowledge on land use and cover allows that measures that guarantee the preservation, maintenance of the environment and space management be appropriate to the reality, since through these factors it is possible to follow the probable environmental impacts and the socioeconomic development of a place in several contexts. The Geographical Information System (GIS) and remote sensing techniques have been applied to land use and land cover mapping. This study aimed to analyze the conversion of land use from different perspectives, concerning geoprocessing techniques, in the southeastern of Roraima State, Brazil, in two distinct periods. In order to verify the land use and cover, two analyses were conducted, using the Spring and TerraView softwares. Great part of the cultivated areas was converted into capoeira, what probably denotes an ending of profitable agriculture, as well as its abandonment caused by the nutritional deficiency of the soil, that became inappropriate for cultivation in the subsequent years. A fuzzy logic would possibly fit well to the types of data analyzed, because the attribute query is overly complex.

As mudanças no uso e cobertura da terra e o comportamento hidrológico da bacia do rio Capim (Paper 390)

“…De forma geral, as formas de uso da terra priorizaram os eixos viários que geometricamente seccionam as bacias hidrográficas sem considerar a preservação das áreas de recarga hídrica (AGUIAR et al, 2007;SILVA JUNIOR et al, 2014). A bacia do rio Capim é predominantemente paraense com uma menor parte no estado do Maranhão, porém a movimentação de produtos e pessoas por meio da BR 010 (Belém-Brasília) influencia diretamente o seu território (LIMA;PONTE, 2012;PIKETTY et al, 2015).…”