Abstract
 The Influence of Topographic Scale in Mass Wasting Susceptibility Modeling Applied to a Pipeline in Southeastern Brazil Track: Mining and Geosciences Author(s): LIS Rabaco, Nelson Fernandes This paper aims to present the results obtained by applying different landslide susceptibility models to a pipeline area in the steep slopes of Serra do Mar in southeastern Brazil, close to Rio de Janeiro city. The topographic attributes incorporated by the models (e.g., slope, curvature, drainage area, flow direction and accumulation) were obtained from digital elevation models derived in the 1:1,000, 1:10,000 and 1:50,000 scales. Soil properties were also obtained from previous field studies carried out in the area and from other literature. Topographic and soil properties were combined in GIS environment, both in mathematical models, based on slope stability analysis and on hillslope hydrology, and in user-driven knowledge models. The relative efficiency of the different models in predicting landslide susceptibility was defined by comparing the areas predicted as unstable by the models with landslide scars mapped in the field. LIS Rabaco Petrobras MC cid. Universitaria Q7 Rio de Janeiro , Rio de Janeiro 21941-598 BR Phone: 55-21-38654935 Fax: 55-21-38654672 E-mail: lismaria@petrobras.com.br Nelson Fernandes UFRJ/IGEO Geografia Cidade Universitaria Rio de Janeiro , Rio de Janeiro 21941-598 BR Phone: 55-2138654935 E-mail: nelsonff@acd.ufrj.br |
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