Hazard assessment of debris-flow-prone watersheds in Cubatão, São Paulo State, Brazil

Vinicius Queiroz Veloso (), Fabio Augusto Vieira Gomes Reis, Victor Cabral, José Eduardo Zaine, Claudia Vanessa Santos Corrêa, Marcelo Fischer Gramani and Caiubi Emmanuel Kuhn
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Vinicius Queiroz Veloso: São Paulo State University – UNESP
Fabio Augusto Vieira Gomes Reis: São Paulo State University – UNESP
Victor Cabral: São Paulo State University – UNESP
José Eduardo Zaine: São Paulo State University – UNESP
Claudia Vanessa Santos Corrêa: São Paulo State University – UNESP
Marcelo Fischer Gramani: Institute for Technological Research – IPT
Caiubi Emmanuel Kuhn: São Paulo State University – UNESP

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2023, vol. 116, issue 3, No 14, 3119-3138

Abstract: Abstract In Brazil, research related to the occurrence and prevention of debris flows is incipient when compared to the extent of the impacts caused by the phenomena. There is a need for further studies that consider susceptibility and hazard, especially in areas that are environmentally and socioeconomically vulnerable. This study aimed at assessing debris-flow hazard in the Rio das Pedras watershed, in Cubatão (State of São Paulo, Brazil), based on a set of different physiographic parameters (geomorphological, morphometric, geological) and in the application of empirical models. The hazard assessment was based on: (1) the evaluation of the history of events in the region; (2) the identification of the geomorphic controlling factors; (3) the estimation of the magnitude of a potential event; and (4) the identification of the elements at hazard. The results show that a debris-flow event in Rio das Pedras would more severely impact the Anchieta Highway (SP-150), the gas pipeline GASAN, the oil pipeline OSSP and the districts Pinhal do Miranda and Cota 95. These results highlight the relevance of geomorphological and geological parameters when estimating the extent of debris runoff, which is essential when defining the hazard in a debris-flow-prone watershed.

Keywords: Serra do Mar; Hydrogeomorphic processes; Empirical model; Magnitude; Forensic geomorphological analysis (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s11069-022-05800-2

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