Produção Nacional
Aplicação de imagens do radar interferométrico (SRTM) na avaliação da fragilidade da bacia do Córrego Cachoeirinha, nos municípios de Cáceres e Porto Estrela /MT
2008; UNIVERSIDADE FEDERAL DE GOIÁS; Volume: 2; Issue: 2 Linguagem: Inglês
ISSN
1678-7226
AutoresSandra Mara Alves da Silva Neves, Ronaldo José Neves, Leonardo Franklin Fornelos,
Tópico(s)Geography and Environmental Studies
ResumoThe environmental analyses, on the geographical approach, provide technical and scientific support for the zoning generation, used in environmental planning. In this perspective it’s necessary to evaluate the environmental vulnerabilities within the ecodynamical conception (Tricart, 1977), based on systems theory. One of the widely used evaluation methodologies, not only in the geographical environment, is the Universal Soil Loss Equation (USLE), using maps to spatialize and quantify its factors. Whereas progress have been made in the generation of Remote Sensing products, through new sensors, this paper proposes the use of SRTM elevation data to generate one of the USLE factors, the Lenght-Slope map. The studied area was corrego Cachoeirinha watershed, located in the municipalities of Caceres and Porto Estrela, Mato Grosso - Brazil. The implementation involved the drafting of rainfall erosivity, soil erodibility, lenght-slope factor, crop/vegetation factor and support practices maps. These maps were combined in ArcGis, allowing the quantification of soil losses in the watershed and the determination of different fragility degrees, in conformity with the classification proposed by UNESCO (1980). The LS map generated from SRTM revealed more details on the hillside shapes. It’s emphasized the greater agility to produce the soil loss maps, consequently the vulnerability, using SRTM
Referência(s)