Bacia hidrográfica do córrego granada – Aparecida de Goiânia – GO: os processos erosivos e a dinâmica espacial urbana

• Autor(a) principal: Aguiar, Vinicius Gomes de
• Data de Publicação: 2009
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UFG
• Texto Completo: http://repositorio.bc.ufg.br/tede/handle/tede/4193
• topic: Aparecida de Goiânia; Granada; Erosão; Inderbitzen; Erosion; ENGENHARIA CIVIL::GEOTECNICA

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.