Avaliação da qualidade ambiental da paisagem da bacia hidrográfica e do reservatório do ribeirão João Leite
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2013-07-09
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Universidade Federal de Goiás
Resumo
The land use and cover analysis is one fundamental phase for performing the strategic planning on
conservation and management of a watershed. This study aims to analyze the landscape of João Leite
stream watershed, located in the Goiás state, on northwest of the Goiânia city, by using geoprocessing
tools, as Geographic Information System (GIS) and Remote Sensing, in order to provide input to
generate a environmental diagnosis. In an analysis performed using multitemporal satellite images
TM/Landsat-5 between the years 1985 to 2011 showed that in watershed of João Leite stream
occurred a decrease in the area of remnant native vegetation in 7,4%. Among municipalities that
compose the watershed, Anápolis had the most suppression of these areas (11.1%). The results of this
analysis can be used by sectors dealing with environmental management because the vegetation
degradation has direct influences the environmental quality of the watershed landscape. This study
also permitted an evaluation of different scenarios in estimating sediments production in the reservoir
supply and João Leite stream watershed using the hydrosedimentological SWAT model, which
showed that among the proposed scenarios, when occur the preservation and recovering the native
vegetation, also occur a lower value in sediment production in the watershed. Concerning the
estimation of sediment production was also used PRISM/ALOS and TM/Landsat-5 satellite images
with spatial resolutions respectively of 2,5 and 30 meters, the result of this estimate considering the
two simulations showed that it occurred proportionally in the watershed, and the highest values were
found almost in the same sub-basins, which demonstrated that the variation between the results was
minimal.
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Citação
OLIVEIRA, Wellington Nunes de. Avaliação da qualidade ambiental da paisagem da bacia hidrográfica e do reservatório do ribeirão João Leite. 2013. 179 f. Dissertação (Mestrado em Engenharia do Meio Ambiente) - Universidade Federal de Goiás, Goiânia, 2013.