Deadly disasters in southeastern South America: flash floods and landslides of February 2022 in Petrópolis, Rio de Janeiro

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dc.contributor.authorAlcântara, Enner
dc.contributor.authorMarengo, José Antonio
dc.contributor.authorMantovani, José
dc.contributor.authorLonde, Luciana de Resende
dc.contributor.authorSan, Rachel Lau Yu
dc.contributor.authorPark, Edward
dc.contributor.authorLin, Yunung Nina
dc.contributor.authorWang, Jingyu
dc.contributor.authorMendes, Tatiana
dc.contributor.authorCunha, Ana Paula
dc.contributor.authorPampuch, Luana
dc.contributor.authorSeluchi, Marcelo
dc.contributor.authorSimões, Silvio
dc.contributor.authorCuartas, Luz Adriana
dc.contributor.authorGoncalves, Demerval
dc.contributor.authorMassi, Klécia
dc.contributor.authorAlvalá, Regina
dc.contributor.authorMoraes, Osvaldo
dc.contributor.authorSouza Filho, Carlos
dc.contributor.authorMendes, Rodolfo Moreda
dc.contributor.authorNobre, Carlos
dc.date.accessioned2025-03-06T18:07:08Z
dc.date.available2025-03-06T18:07:08Z
dc.date.issued22023
dc.description.abstractOn 15 February 2022, the city of Petrópolis in the highlands of the state of Rio de Janeiro, Brazil, received an unusually high volume of rain within 3 h (258 mm), generated by a strongly invigorated mesoscale convective system. It resulted in flash floods and subsequent landslides that caused the deadliest landslide disaster recorded in Petrópolis, with 231 fatalities. In this paper, we analyzed the root causes and the key triggering factors of this landslide disaster by assessing the spatial relationship of landslide occurrence with various environmental factors. Rainfall data were retrieved from 1977 to 2022 (a combination of ground weather stations and the Climate Hazards Group InfraRed Precipitation – CHIRPS). Remotely sensed data were used to map the landslide scars, soil moisture, terrain attributes, line-of-sight displacement (land surface deformation), and urban sprawling (1985–2020). The results showed that the average monthly rainfall for February 2022 was 200 mm, the heaviest recorded in Petrópolis since 1932. Heavy rainfall was also recorded mostly in regions where the landslide occurred, according to analyses of the rainfall spatial distribution. As for terrain, 23 % of slopes between 45–60∘ had landslide occurrences and east-facing slopes appeared to be the most conducive for landslides as they recorded landslide occurrences of about 9 % to 11 %. Regarding the soil moisture, higher variability was found in the lower altitude (842 m) where the residential area is concentrated. Based on our land deformation assessment, the area is geologically stable, and the landslide occurred only in the thin layer at the surface. Out of the 1700 buildings found in the region of interest, 1021 are on the slope between 20 to 45∘ and about 60 houses were directly affected by the landslides. As such, we conclude that the heavy rainfall was not the only cause responsible for the catastrophic event of 15 February 2022; a combination of unplanned urban growth on slopes between 45–60∘, removal of vegetation, and the absence of inspection were also expressive driving forces of this disaster.
dc.description.physical19 p.
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.uriCAPES (88887.136402/2017-00) FAPESP (2014/50848-9) CNPq (302575/2021-9, 465501/2014-1)
dc.format.mimetypePDF
dc.identifier.affiliationUniversidade do Vale do Paraíba
dc.identifier.affiliationCentro Nacional de Monitoramento e Alertas de Desastres Naturais
dc.identifier.affiliationNanyang Technological University
dc.identifier.affiliationInstitute of Earth Sciences
dc.identifier.affiliationUniversidade do Estado de São Paulo
dc.identifier.affiliationUniversidade de Campinas
dc.identifier.affiliationUniversidade de São Paulo
dc.identifier.bibliographicCitationALCÂNTARA, E, Marengo, J. A., Mantovani, J., Londe, L. R., San, R. L. Y., Park, E., Lin, Y. N., Wang, J., Mendes, T., Cunha, A. P., Pampuch, L., Seluchi, M., Simões, S., Cuartas, L. A., Goncalves, D., Massi, K., Alvalá, R., Moraes, O., Filho, C. S., Mendes, R., and Nobre, C.: Deadly disasters in southeastern South America: flash floods and landslides of February 2022 in Petrópolis, Rio de Janeiro, Nat. Hazards Earth Syst. Sci., v. 23, n. 3, p. 1157–1175, 2023. Disponível em: https://doi.org/10.5194/nhess-23-1157-2023, 2023.
dc.identifier.doi10.5194/nhess-23-1157-2023
dc.identifier.urihttps://repositorio.univap.br/handle/123456789/619
dc.language.isoen_US
dc.publisherEuropean Geosciences Union
dc.rights.holderNatural Hazards and Earth System Sciences
dc.subject.keywordDeadly disasters
dc.subject.keywordFloods
dc.subject.keywordLandslides
dc.titleDeadly disasters in southeastern South America: flash floods and landslides of February 2022 in Petrópolis, Rio de Janeiro
dc.typeArtigos de Periódicos

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