Cerri Rodrigo I, Reis Fábio A G V, Gramani Marcelo F, Giordano Lucilia C, Zaine José Eduardo
Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP), Instituto de Geociências e Ciências Exatas, Departamento de Geologia Aplicada, Avenida 24A, 1515, Bela Vista, 16506-900 Rio Claro, SP, Brazil.
Instituto de Pesquisas Tecnológicas do Estado de São Paulo/IPT, Avenida Prof. Almeida Prado, 532, Cidade Universitária, 05508-901 São Paulo, SP, Brazil.
An Acad Bras Cienc. 2017 Oct-Dec;89(4):2609-2623. doi: 10.1590/0001-3765201720170224. Epub 2017 Aug 31.
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.
