Analyze of shallow-landslide risk and susceptibility in São Paulo city, Brazil (2013)
- Authors:
- Autor USP: VIEIRA, BIANCA CARVALHO - FFLCH
- Unidade: FFLCH
- Subjects: ESCORREGAMENTO DOS SOLOS; RISCO AMBIENTAL; BACIA HIDROGRÁFICA
- Language: Inglês
- Abstract: In the São Paulo city, where about 11 million inhabitants live, landslides occur frequently, especially during the summer, causing the destruction of houses and urban equipment, economic damage, and the loss of lives. The number of areas threatened by landslides has been increasing each year. The objective of this article is to analyze the probability of risk and susceptibility to shallow landslides in the Limoeiro River basin, which is located at the head of the Aricanduva River basin, one of the main hydrographic basins in the São Paulo city. To map areas of risk, we created a cadastral survey form to evaluate landslide risk in the field. Risk was categorized into four levels based on natural and anthropogenic factors: R1 (low risk), R2 (average risk), R3 (high risk), and R4 (very high risk). To analyze susceptibility to shallow landslides, we used the SHALSTAB (Shallow Landsliding Stability) mathematical model and calculated the Distribution Frequency (DF) of the susceptibility classes for the entire basin. Finally, we performed a joint analysis of the average Risk Concentration (RC) and Risk Potential (RP). We mapped 16 risk sectors containing approximately 1872 at-risk homes and more than half of which presented a very high (R4) probability of risk to the population. In the susceptibility map, 41% of the area was classified as stable and 20% as unconditionally unstable. Although the latter category accounted a smaller proportion of the total area, it contained a concentration (RC) of 40% of the mapped risk areas with a risk potential (RP) of 12%. We found that the locations of areas predicted to be unstable by the model coincided with the risk areas mapped in the field. This combination of methods can be applied to evaluate the risk of shallow landslides in densely populated areas and can assist public managers in defining areas that are unstable and inappropriate for occupation
- Imprenta:
- Publisher: International Association of Geomorphologists
- Publisher place: Paris
- Date published: 2013
- Source:
- Título do periódico: Abstracts
- Conference titles: International Conference on Geomorphology - IAG/AIG : Geomorphology and sustainability
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ABNT
LISTO, Fabrizio de Luiz Rosito e VIEIRA, Bianca Carvalho. Analyze of shallow-landslide risk and susceptibility in São Paulo city, Brazil. 2013, Anais.. Paris: International Association of Geomorphologists, 2013. . Acesso em: 23 abr. 2024. -
APA
Listo, F. de L. R., & Vieira, B. C. (2013). Analyze of shallow-landslide risk and susceptibility in São Paulo city, Brazil. In Abstracts. Paris: International Association of Geomorphologists. -
NLM
Listo F de LR, Vieira BC. Analyze of shallow-landslide risk and susceptibility in São Paulo city, Brazil. Abstracts. 2013 ;[citado 2024 abr. 23 ] -
Vancouver
Listo F de LR, Vieira BC. Analyze of shallow-landslide risk and susceptibility in São Paulo city, Brazil. Abstracts. 2013 ;[citado 2024 abr. 23 ] - Aplicação do modelo Shalstab para mapeamento da suscetilidade a escorregamentos rasos em Caraguatatuba, Serra do Mar (SP)
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