Multitemporal Analysis of Land Use and Coverage in the Low Course of the Araguaia River

Abstract

This work aimed to analyze the spatial behavior of plant formations and land use in the Ecological Tension Area Amazon-Cerrado. To this end, the Araguaia river basin was selected, in its low course, because it constitutes a physical-natural limit between the two Biomms, with intense dynamics of use and land cover Thus, in addition to researching scientific references and socioeconomic data from secondary sources, a geographic database was elaborated, with georeferenced data, and spatial operations are carried out. Among them, a supervised classification of land use and coverage, with multi-temporal analysis between the years 1984, 2000 and 2018. Thus, an expansion of 4.2 ha of Forest (Amazon biome) was observed on the savanic phytophysiognomy (Cerrado). However, the suppression of forested areas reached values around 21,700 km 2 , with direct conversions to anthropic activities, mainly pasture, about 71%. The results of the mapping compared with the data of the agricultural census show that the landscape of the Araguaia river basin, in its low course, is dominated by areas of pasture managed. However, public policies and government investments have fomented the expansion of agriculture in the direct bank of the river Araguaia, from 2000 onwards, and that the landscape of the left bank is dominated by pasture managed. Finally, it was found that the implantation of protective areas contributed to the vegetational regeneration of both biomms.

Flow variability in the Araguaia River Hydrographic Basin influenced by precipitation in extreme years and deforestation

“…This can be seen in the increase to 3,180.7 km² in the water mass in recent decades. For the Araguaia Lower region, Oliveira et al (2020) observed similar changes in land use and cover in relation to the advance of pasture and agriculture, with the expansion of the latter class being attributed to public policy incentives and government investments. In this way, the authors discussed how much this environmental degradation will affect local ecosystems, since native forests are being deforested with the two banks, right and left, of this stretch of the Araguaia River being marked by different forms of land use such as agriculture and pasture.…”

The Sustainable Expansion of the Cocoa Crop in the State of Pará and Its Contribution to Altered Areas Recovery and Fire Reduction

“…The use of TerraClass project data allowed qualifying the deforestation identified by PRODES that coincided with cocoa properties. Thus, for the multitemporal analysis of land use and land cover in cocoa properties, transition matrices were used [31] [32].…”