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BIBTEX RIS

Landslides Zonation Hazard: relation between geological structures and landslides occurrence in hilly tropical regions of Brazil

2017; Brazilian Academy of Sciences; Volume: 89; Issue: 4 Linguagem: Inglês

10.1590/0001-3765201720170224

ISSN

1678-2690

Autores

Rodrigo Irineu Cerri, Fábio Augusto Gomes Vieira Reis, Marcelo Fischer Gramani, LUCILIA C. GIORDANO, José Eduardo Zaine,

Tópico(s)

Geotechnical Engineering and Soil Stabilization

Resumo

This paper presents a new approach of landslides zonation hazard studies, based on an integrated study of structural data along with geomorphological and external factors, in a hilly regions of Brazil, covered by a tropical humid rain-forest, called Serra do Mar. The Serra do Mar consists of a hilly region along the east coast of Brazil, with high slopes and many geological structures in a gneiss - migmatitic terrain. In contrast to traditional approaches, this method proposes that structural data (foliation, fractures and bedding planes) and its relation with the slope geometry, is important to be consider in the landslide zonation hazard, along with declivity, relative relief, soil and rock properties, land use and vegetation cover and hydrogeological and climate factors. Results show that slopes with high hazard have the same dip direction of geological structures. Landslide zonation hazard using structural data contributes to a better understanding of how these structures, preserved in tropical residual soils, influence on slope stability and generates landslides.

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