Análise da evolução da paisagem urbana de Goiânia (GO) e a distribuição dos focos erosivos hídricos de 1992 a 2016
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2019-03-29
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Universidade Federal de Goiás
Resumo
Urban water erosion in Brazil is one of the socio-environmental problem that have emerged with
the process of intensive and disorganized urban expansion since the 1960s, given its severity.
Goiânia, the capital of the state of Goiás, has been suffering from this process since the 1980s. The
process were studied, the first time in 1982, under the coordination of the City Hall, which
identified 106 erosive points of ravines and gullies, both in the urban area and in urban expansion
zones, especially in unplanned neighborhoods with a population density of over 20%. Still in the
1990s it was intensive but since 2000 it was declined. The present research utilized one
methodology to analyze the space-time behavior in time of the urban water erosion of Goiânia,
now called Builted-Macrozone, from 1992 to 2016. It is studied: the distribution of medium and
large erosion points of ravine and gullies type, their space-time evolution and respective critical
areas where a greater density of the number of erosion points. The aim was to identify the
influence of the physical environmental conditions, the erodibility of the soils, and the changes in
urban land use, as well as the expansion of the allotments/assessments that originated
neighborhoods in the capital. The methodology utilized bibliographical and documentary research
and geotechnologies as analysis of satellite images of high resolution and Geographic Information
Systems (GIS) in order to cartography the phenomenon over time. The results revealed that, in fact,
urban use and occupation undertaken in an unplanned manner, especially on sensitive land, are the
most critical sectors. They revealed in particular that the occupation and higher densities of erosive
foci and their respective critical areas follow an arc trajectory that begins in the east and projects
gradually to the north, northwest and then to the southwest as the periphery is being urbanized in
the same direction.
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CAVALCANTE, Lizandra Ribeiro. Análise da evolução da paisagem urbana de Goiânia (GO) e a distribuição dos focos erosivos hídricos de 1992 a 2016. 2019. 219 f. Dissertação (Mestrado em Geografia) - Universidade Federal de Goiás, Goiânia, 2019.