Bacia hidrográfica do córrego granada – Aparecida de Goiânia – GO: os processos erosivos e a dinâmica espacial urbana
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2009-10-29
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Universidade Federal de Goiás
Resumo
The basin of the Granada stream, with approximately 15 km2, is placed in the central part of
the Aparecida de Goiânia - GO, located in the region metropolitan of Goiânia, to the south of
the Goiânia. This basin limits for the coordinates east 682,000 and 688,000, and 8.145.000
north 8.139.000m and, MC -51º, South hemisphere. Aparecida it presents a confusion growth,
intensified from 1970, configuring a big horizontal urbanization, with demographic empty in
the interior of the city. The ambient impacts in the city if had evidenced in the measure that
the city if to expand on the deep ones of existing valleys, as in the case of the near
occupations to the Granada stream. All these not calculated uses of lands in the basin, that is,
without looking for to establish tools and methodologies of conservation, come back toward
the ambient-urban planning, had induced negatives occurrence of the ambient impacts and
partner-economic, mainly the deflagration and the acceleration of erosive processes, generally
in direction to the courses of the rivers, as it is the case of the soil erosions that leave the
vulnerable inhabitants the catastrophic accidents. Soon, to attain the central objective of this
research, that to be understand as the urban space dynamics speeds up or to give rise to, start
the erosive processes in the basin of the Granada stream, had been elaborated map of
declivity, soil in-situ, occupation of lands and bending of the sources, from digital modeling
of fine altimetric data with survey of field by means of topographical receiver GPS and
images of satellite of diverse sensors. The study area is characterized for the ground
predominance of the type Ustox soils, that had been classified how much its erodibilidade, by
means of the laboratorial assay Inderbitzen, adapted in the scope of this research. With the
assay it was possible to determine the loss of ground soil, for the action of the superficial
draining in indeformados bodies of test. Although low the declivity of the land, the basin of
Granada possess almost rectilinear, associates the deep and fragile ground, what it more than
induced the to be published 30 erosions.
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AGUIAR, Vinicius Gomes de. Bacia hidrográfica do córrego granada – Aparecida de Goiânia – GO: os processos erosivos e a dinâmica espacial urbana. 2009. 95 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2009.