Comparação entre as análises paramétrica e integrada na suscetibilidade a escorregamentos no entorno de dutos: Duto Orbel, Rio de Janeiro

• Autor(a) principal: Silva, Camila Amélia Coelho da [UNESP]
• Data de Publicação: 2015
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/132700; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/21-12-2015/000855531.pdf
• topic: Engineering geology; Geologia de engenharia; Deslizamentos (Geologia); Rio de Janeiro (Estado)

The analysis of the environment through the terrain evaluation has a great significance in the study of its susceptibility to natural processes, such as mass movements. This research aimed the comparison between two different approaches to landslide susceptibility mapping, using GeoEye high resolution images (0.5 m). In the Integrated Analysis, the terrain elements were analyzed together through the physiographic compartmentalization. In the Parametric Analysis several thematic maps in the same scale, were combined using weights, defined by the AHP Method. The study area has 108,6 km², is a stretch of the ORBEL pipeline located in the municipality of Duque de Caxias, and portions of the municipalities of Nova Iguaçu and Belford Roxo, Rio de Janeiro State. This region is crossed by several gas and oil pipelines and has a considerable economic significance. The research steps involved: characterization of the area with the support of bibliographic data; elaboration of auxiliary maps through the Digital Elevation Model, such as the Hipsometric, Declivity and Slope Form maps, scale 1:50,000; Landslide Inventory Map, through the extraction of landslide features in the image from January 2010, with a total of 165 identified features; Landslide Susceptibility Map - Physiographic Compartmentalization elaborated from the photo-reading, photo-analysis and photointerpretation in the GeoEye images that resulted in the division into four physiographic units. The Landslide Susceptibility Map - AHP Method generated through the weighted combination of several thematic maps, it used the pairwise hierarchy method for the allocation of weights and were also obtained four susceptibility classes. The comparison between the susceptibility maps was carried out using both quantitative and descriptive analysis. It is concluded that the two approaches reached the purpose of rating the landslide susceptibility, but the Parametric Analysis showed a greater level ...