Analytic hierarchy process (AHP) applied to flood susceptibility in São José dos Campos, São Paulo, Brazil

  • Lucas Guimarães da Silva Programa de Pós-Graduação em Ciências Ambientais (PPGCA). Universidade de Taubaté (UNITAU), Estrada Municipal Doutor José Luiz Cembranelli, n°5000, CEP: 12081-010, Taubaté, SP, Brazil.
  • Celso de Souza Catelani Programa de Pós-Graduação em Ciências Ambientais (PPGCA). Universidade de Taubaté (UNITAU), Estrada Municipal Doutor José Luiz Cembranelli, n°5000, CEP: 12081-010, Taubaté, SP, Brazil.
  • Marcelo dos Santos Targa Programa de Pós-Graduação em Ciências Ambientais (PPGCA). Universidade de Taubaté (UNITAU), Estrada Municipal Doutor José Luiz Cembranelli, n°5000, CEP: 12081-010, Taubaté, SP, Brazil.
DOI: https://doi.org/10.4136/ambi-agua.2574
Keywords: flooding, geoprocessing, multicriteria analysis

Abstract

The changes in environmental factors in a hydrographic basin, mainly in the urban environment, enable different scenarios than the change of parameters in climatic, physical, political, and socioeconomic factors. Those changes may have immediate effects on indigenous populations, often making them vulnerable to the risk of flooding. This article evaluates the vulnerability to flooding in the municipality of São José dos Campos, State of São Paulo, Brazil using multicriteria analysis and geoprocessing techniques. Quantum GIS (QGIS) was used in the manipulation and processing of vector and matrix data related to the terrain slope, hydrography, geotechnics, and data history of flooding (2009 - 2018) in São José dos Campos. The hierarchy and criteria weighting processes were carried out, as well as the zoning of areas at risk of flooding. Thus, it was found that 23.81% and 2.17% of the municipal territory has high and very high susceptibility to flooding. It can be concluded that the combined use of multicriteria analysis and geoprocessing is an effective contribution to assist the management of public policies in order to obtain more assertive decisions in the prevention or reduction of flood risks.


Published
07/12/2020
Issue
Vol. 15 No. 7 (2020)
Section
Papers

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