Mapeamento das unidades de paisagem natural na bacia do rio Demini, afluente do rio Negro–AM
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2016-12
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The campinas and campinaranas are ecosystems that occupy large areas in the Rio Negro basin. They are associated with specific soil types such as Gleysols and Spodosols, as well as drainage conditions and specific relief forms yielding particulars landscape units. The goals of this paper are to identify and map the major landscape units in the Middle Demi region considering the components soil, topography and vegetation. It was done transect, from the edge to the center of the plateau was drawn, aiming to cover the greatest environmental variation. Along this transect were installed plots for sampling vegetation, pits and augerings boreholes were made for groundwater measuring, soil sampling, and its description and subsequent classification. The results obtained from the transect were extrapolated to larger area through analysis of a Landsat 7 image. In this image it were used contrast techniques, true color and false color composition besides the calculation of the normalized difference vegetation index. Three landscape units were identified: forested campinarana associated with well-drained Spodosols closer the edges of the low plateaus or lines of drainage incision; wooded campinarana related to bad drained Spodosols; and campinas associated toGleysols in wetlands on the central regions of the plateau.
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Amazônia, Unidades de paisagem, Campinas e campinaranas, Amazon, Landscape units
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GUIMARÃES, Felipe Silva et al. Mapeamento das unidades de paisagem natural na bacia do rio Demini, afluente do Rio Negro–AM. ACTA Geográfica, Boa Vista, v. 10, n. 24, p. 18-33, 2016. DOI: 10.18227/2177-4307.acta.v10i24.2922. Disponível em: https://revista.ufrr.br/actageo/article/view/2922. Acesso em: 11 jul. 2024.