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

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...

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Bibliographic Details
Published in:	Anais da Academia Brasileira de Ciências Vol. 89; no. 4; pp. 2609 - 2623
Main Authors:	Cerri, Rodrigo I, Reis, Fábio A G V, Gramani, Marcelo F, Giordano, Lucilia C, Zaine, José Eduardo
Format:	Journal Article
Language:	English
Published:	Brazil Academia Brasileira de Ciências 01-10-2017
Subjects:	Caraguatatuba Geological Structures Hazard Zonation Landslides MULTIDISCIPLINARY SCIENCES Serra do Mar Serra do Mar Landslides Geological Structures Caraguatatuba Hazard Zonation
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Summary:	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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0001-3765 1678-2690 1678-2690
DOI:	10.1590/0001-3765201720170224