Abstract

back
   Back


Paper
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