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

  1. Alcântara, Enner
  2. Marengo, José A.
  3. Mantovani, José
  4. Londe, Luciana R.
  5. San, Rachel Lau Yu
  6. Park, Edward
  7. Lin, Yunung Nina
  8. Wang, Jingyu
  9. Mendes, Tatiana
  10. Cunha, Ana Paula
  11. Pampuch, Luana
  12. Seluchi, Marcelo
  13. Simões, Silvio
  14. Cuartas, Luz Adriana
  15. Goncalves, Demerval
  16. Massi, Klécia
  17. Alvalá, Regina
  18. Moraes, Osvaldo
  19. Filho, Carlos Souza
  20. Mendes, Rodolfo
  21. Nobre, Carlos

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1000 Titel
  • Deadly disasters in southeastern South America: flash floods and landslides of February 2022 in Petrópolis, Rio de Janeiro
1000 Autor/in
  1. Alcântara, Enner |
  2. Marengo, José A. |
  3. Mantovani, José |
  4. Londe, Luciana R. |
  5. San, Rachel Lau Yu |
  6. Park, Edward |
  7. Lin, Yunung Nina |
  8. Wang, Jingyu |
  9. Mendes, Tatiana |
  10. Cunha, Ana Paula |
  11. Pampuch, Luana |
  12. Seluchi, Marcelo |
  13. Simões, Silvio |
  14. Cuartas, Luz Adriana |
  15. Goncalves, Demerval |
  16. Massi, Klécia |
  17. Alvalá, Regina |
  18. Moraes, Osvaldo |
  19. Filho, Carlos Souza |
  20. Mendes, Rodolfo |
  21. Nobre, Carlos |
1000 Verlag
  • Copernicus Publications
1000 Erscheinungsjahr 2023
1000 Publikationstyp
  1. Artikel |
1000 Online veröffentlicht
  • 2023-03-21
1000 Erschienen in
1000 Quellenangabe
  • 23(3):1157-1175
1000 Copyrightjahr
  • 2023
1000 Lizenz
1000 Verlagsversion
  • https://doi.org/10.5194/nhess-23-1157-2023 |
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1000 Begutachtungsstatus
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1000 Abstract/Summary
  • <jats:p>Abstract. On 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. </jats:p>
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  1. Conselho Nacional de Desenvolvimento Científico e Tecnológico |
  2. Ministry of Education - Singapore |
  3. Earth Observatory of Singapore |
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    1000 Förderer Ministry of Education - Singapore |
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    1000 Förderer Earth Observatory of Singapore |
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1000 Erstellt am 2024-05-24T02:12:56.494+0200
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