Land-Use and Land-Cover Mapping of the Brazilian Cerrado Based Mainly on Landsat-8 Satellite Images

Abstract

The Brazilian Cerrado is one of the world´s biodiversity hotspot and hosts some of the most intensive agricultural activities for food production in the world. The objective of this study was to produce a land-use and land-cover (LULC) map of the Cerrado based on Landsat-8 Operational Land Imager (OLI) images. A set of 121 scenes from 2013 was processed using the image segmentation technique. The segments were exported in the shapefi le format and interpreted visually in a geographical information system software using RGB/564 color composites. The following LULC classes were considered: annual croplands, perennial croplands, cultivated pasturelands, reforestation, mosaic of occupation, urban areas, mining areas, bare soil, forestlands, non-forestlands, water bodies, and non-identifi ed (clouds and burned areas). The overall accuracy was estimated by an independent scientist with large experience in Cerrado´s image interpretation. The results showed that 43.4% of the study area (88.5 million hectares) were already converted into agricultural, urban and mining areas, 54.6% (111 million hectares) were still natural areas, and 1.9% (3.9 million hectares) was classified as non-identified. Cultivated pasturelands were the most representative land-use type (29.5%), followed by annual croplands (8.5%) and perennial croplands (3.1%). The overall accuracy of the final map was 80.2%.

Large-scale Degradation of the Tocantins-Araguaia River Basin

“…90), mainly in the Araguaia basin (Latrubesse et al 2019), in addition to waterways and a large-scale water diversion system between the Tocantins and São Francisco basins (Daga et al 2020). The rapid expansion of agribusiness for soy and other commodities has caused the loss of ~50% of the Cerrado (Scaramuzza et al 2017), and the activity has advanced progressively over remnant natural areas (Trigueiro et al 2020). In 2019, pastures and monocultures covered more than 42% of the basin (Fig.…”

Ocorrência de queimadas em áreas legalmente protegidas do bioma Cerrado (1999/2018)

“…Em uma análise voltada ao estado de Goiás, Scaramuzza et al (2017) A partir dessa perspectiva, a proposta deste trabalho foi a de espacializar, quantificar e analisar a ocorrência de queimadas em áreas legalmente protegidas no bioma Cerrado durante o período de 1999 a 2018, considerando as Unidades de Conservação, as Terras Indígenas e os Territórios Quilombolas.…”

Research Perspectives on the Use of Phosphogypsum in the Brazilian Cerrado

“…Yet, the environmental impact of agricultural expansion and land use in the Cerrado has called public attention, both nationally and internationally [4]. The agricultural development in the Cerrado has reduced the savanna area to 54.6% of its original vegetation [6].…”

“…6 Mg[10]. Out of this total, 1.7 106 Mg yr -1 have been used as soil amendment, 0.7 10 6 Mg yr -1 in cement industry, and the remaining 2.1 10 6 Mg yr -1…”