Análise socioambiental da evolução das pastagens degradadas no município de Porangatu, no período de 1983 a 2013
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2014-04-29
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Universidade Federal de Goiás
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This research aims to analyze the environmental degradation of pastures in
Porangatu city. Relating to the knowledge of the reality of the country on the
productive dynamics of livestock, it exhibits spatial transformations resulting from
productive structuring performed on forms of use and occupation of land. It proposes
also examines how evolved the degradation of rangelands in Porangatu city,
focusing on the period 1983-2013. To reach the target search, come the following
ways: literature research for identifying, locating, compiling theoretical information;
agglutination of data and information from IBGE, INCRA, SGEI for collection and
analysis of physical and social environmental characteristics, description of the main
soil types found in the region, correlating the tables and the graphs with quantitative
representations in Brazil and Porangatu context. The dynamics of the use of land
was analyzed from images of spatial resolution of 30 meters, at point-orbits in 222/69
and 222/70 dated 17.02.2013 which cover the study area; for this, the tessellation
process using software Processing Images Envi 4.7 was performed. Also this
software the procedure of atmospheric correction of the images was performed, the
transformation of digital numbers in appearance values with the maximum
verisimilitude classifier (MaxVer) led to more accurate ranking with satisfactory
distinction between the levels of pasture degradation. The identification of
degradation levels was based on the vigor of the grass; the appearance of uncovered
areas; weeds emergence and erosion occurrence. For the validation of information,
was conducted fieldwork with collecting GPS points, and even interviews with
landowners about ways to manage the property taken during the research analysis.
Cartographic products spatialize areas of expansion permit to analyze the
transformations that make up the dynamics of the production process, and the
refunctionalisation of areas that until then come to stagnancy in agricultural use, in
other words, it has already quite degraded by increased use and without proper
management. It becomes necessary the restructuring challenge of the productive
system through the equity incentive. Thus the existence of favorable natural aspects
to the expansion of agriculture reaches to goiano north as new trends, where soy is
facing this new expansion model.
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Garção, Lucimar M. C. Análise socioambiental da evolução das pastagens degradadas no município de Porangatu, no período de 1983 a 2013. 2014.110 f. Dissertação (Mestrado em Geografia) - Universidade Federal de Goiás, Goiânia, 2014.