Evaluation of Damaged Buildings due to Debris Flow and Flash Floods Processes in the Ribeira Valley (SP) in 2014

Authors

  • Luzia de Jesus Matos Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas. Departamento de Geografia. Programa de Pós - Graduação em Geografia Física
  • Claudio José Ferreira Instituto Geológico - IG
  • Carlos Valdir de Meneses Bateira Universidade de Lisboa. Instituto de Geografia e Ordenamento do Território. Centro de Estudos Geográficos. Grupo Riskam
  • Bianca Carvalho Vieira Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas. Departamento de Geografia

DOI:

https://doi.org/10.11606/rdg.v0ispe.144423

Keywords:

Debris Flow, Flash Floods, Building

Abstract

The present study quantify the number of buildings affected by natural flow events such as debris flows, mud flows and the consequent flash floods which took place at the municipalities of Itaoca and Apiaí, Vale do Ribeira, in January 2014.  The pathway of the natural flow and flash flood events of 2014 was mapped through the distribution of unconsolidated deposits over the built areas. Tools such as the historical images of Google Earth (from August 2014), orthophotos, photographs of the same year and fieldwork enabled the visualization of events and buildings according to the following methodological steps: 1) Mapping of buildings prior of the events; 2) Mapping of flows and flash flood events in 2014; 3) Systematization of data and quantification of the hit builds. In all, 1,221 buildings were mapped out of which 565 were directly hit by the flows or flash floods. Preliminary results show the density of buildings in triggering events area increase the quantity of hit risk elements; the impacts over the constructions are conditioned by the variability of the hazardous processes.

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Author Biography

  • Bianca Carvalho Vieira, Universidade de São Paulo. Faculdade de Filosofia, Letras e Ciências Humanas. Departamento de Geografia

    Vice-cordenadora do departamento de Geografia Física - PPGF

Published

2018-09-09

How to Cite

Matos, L. de J., Ferreira, C. J., Bateira, C. V. de M., & Vieira, B. C. (2018). Evaluation of Damaged Buildings due to Debris Flow and Flash Floods Processes in the Ribeira Valley (SP) in 2014. Revista Do Departamento De Geografia, spe, 57-67. https://doi.org/10.11606/rdg.v0ispe.144423