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Susceptibility analysis of landslide and debris flows events at Contorno Sul Road from Caraguatatuba city to São Sebastião Seaport area, City of Caraguatatuba and São Sebastião - São Paulo state

Grant number: 15/12982-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): August 01, 2015
Effective date (End): January 31, 2016
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal researcher:Fábio Augusto Gomes Vieira Reis
Grantee:Gabriela Hernandes Villani
Home Institution: Instituto de Geociências e Ciências Exatas (IGCE). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil

Abstract

The study aimed is analyze the susceptibility of landslide and debris flows events occurrence by the geological-geotechnical mapping of the region between the Rio Juqueriquerê and São Francisco Stream Hydrographic Basins, in São Sebastião and Caraguatatuba Cities (São Paulo). The area have shown intense alteration by human occupation and by the implementation of many civil constructions, i.e. the construction of the new Contorno Sul Tamoios Road. The research will be developed in five steps: 1st step - bibliographic research focusing on the events occurences and its origins; 2nd step - Data base building and integration between the topographic map at 1:50 000 scale with the geologic-geomorphologic maps and aerial images from the area, following the methodology proposed by Zaine (2011); 3rd step - Fieldtrip work for outcrop description from the different physiographic units prior identified; 4th step - Geotechnical analysis of the samples collected during the fieldtrip in laboratory; 5th step - Geological-geotechnical map building and evaluation of the susceptibility to landslide and debris flows events by the integration of the results obtained. This research study will enable the study area characterization in geological-geotechnical terms, focusing on the landslide and debris flows events, checking the probable alterations that is occurring in the area by the implementation of the new civil constructions.

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