On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area

Detalhes bibliográficos
Autor(a) principal: Cardoso, Ana
Data de Publicação: 2022
Outros Autores: Pereira, Susana, Ferreira, Tiago M., Zêzere, José L., Melo, Raquel, Vaz, Teresa, Oliveira, Sérgio C., Garcia, Ricardo A.C., Santos, Pedro P., Reis, Eusébio, Lourenço, Paulo B.
Tipo de documento: Artigo de conferência
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/32492
https://doi.org/Cardoso, A., Pereira, S., Ferreira, T. M., Zêzere, J. L., Melo, R., Vaz, T., Oliveira, S. C., Garcia, R. A. C., Pinto Santos, P., Reis, E., and Lourenço, P. B.: On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area, 10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022, ICG2022-557, https://doi.org/10.5194/icg2022-557, 2022.
https://doi.org/10.5194/icg2022-557
Resumo: This work aims to assess the physical vulnerability of buildings (PVB) exposed to landslides that can be triggered by rainfall and earthquake in the Lisbon metropolitan area (LMA). Susceptibility to landslides triggered by rainfall was assessed with a statistical model (Information Value), using seven predisposing factors: slope, aspect, geology, curvature, land use, and topographic wetness and position (TPI) indexes. A landslide inventory containing 4k landslides identified in the Lisbon and Tagus Valley region was used. The ROC curve of this model produced an AUC of 0.92. In this approach, the area defined as most susceptible was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 1 m and an accumulated material height of 0.5 m. Susceptibility to landslides triggered by earthquakes was assessed with an Analytic Hierarchy Process to achieve the relative weights based on the Saaty’s scale of influence using six predisposing factors: slope, curvature, TPI, geology, PGA and distance to faults. The results of this model were compared with a historical inventory of landslides triggered by earthquakes in the LMA obtained from documental sources (Vaz and Zêzere, 2016). The area most susceptible to landslides (8th and 9th deciles) was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 3 m and an accumulated material height of 1 m. In both cases, the PVB assessment considered all exposed buildings with a residential function surveyed in the 2011 Census (Georeferenced Buildings Database - BGE), including the following parameters: construction material, presence of reinforced structure, number of floors, conservation status, and need for repairs in the structure and finishes. Each parameter was divided into a set of building classes obtained from BGE. A score was given to each building class and the respective parameter. Both scores and parameters’ weights are based on expert opinion and dedicated literature (Guillard-Gonçalves et al., 2016; Pereira et al., 2020). The analysis allowed us to observe meaningful regional multi-hazard potential interactions between earthquake and rainfall triggered landslides which can generate, in space and time, a complex level of damages scenarios for residential buildings. Additionally, it contributes to identifying risk hotspots and possible risk adaptation and mitigation measures.
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spelling On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan AreaThis work aims to assess the physical vulnerability of buildings (PVB) exposed to landslides that can be triggered by rainfall and earthquake in the Lisbon metropolitan area (LMA). Susceptibility to landslides triggered by rainfall was assessed with a statistical model (Information Value), using seven predisposing factors: slope, aspect, geology, curvature, land use, and topographic wetness and position (TPI) indexes. A landslide inventory containing 4k landslides identified in the Lisbon and Tagus Valley region was used. The ROC curve of this model produced an AUC of 0.92. In this approach, the area defined as most susceptible was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 1 m and an accumulated material height of 0.5 m. Susceptibility to landslides triggered by earthquakes was assessed with an Analytic Hierarchy Process to achieve the relative weights based on the Saaty’s scale of influence using six predisposing factors: slope, curvature, TPI, geology, PGA and distance to faults. The results of this model were compared with a historical inventory of landslides triggered by earthquakes in the LMA obtained from documental sources (Vaz and Zêzere, 2016). The area most susceptible to landslides (8th and 9th deciles) was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 3 m and an accumulated material height of 1 m. In both cases, the PVB assessment considered all exposed buildings with a residential function surveyed in the 2011 Census (Georeferenced Buildings Database - BGE), including the following parameters: construction material, presence of reinforced structure, number of floors, conservation status, and need for repairs in the structure and finishes. Each parameter was divided into a set of building classes obtained from BGE. A score was given to each building class and the respective parameter. Both scores and parameters’ weights are based on expert opinion and dedicated literature (Guillard-Gonçalves et al., 2016; Pereira et al., 2020). The analysis allowed us to observe meaningful regional multi-hazard potential interactions between earthquake and rainfall triggered landslides which can generate, in space and time, a complex level of damages scenarios for residential buildings. Additionally, it contributes to identifying risk hotspots and possible risk adaptation and mitigation measures.10th International Conference on Geomorphology2022-08-31T11:36:34Z2022-08-312022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjecthttp://hdl.handle.net/10174/32492https://doi.org/Cardoso, A., Pereira, S., Ferreira, T. M., Zêzere, J. L., Melo, R., Vaz, T., Oliveira, S. C., Garcia, R. A. C., Pinto Santos, P., Reis, E., and Lourenço, P. B.: On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area, 10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022, ICG2022-557, https://doi.org/10.5194/icg2022-557, 2022.http://hdl.handle.net/10174/32492https://doi.org/10.5194/icg2022-557enghttps://meetingorganizer.copernicus.org/ICG2022/ICG2022-557.htmlnaonaosimndndndndraquel.melo@uevora.ptndndndndndndCardoso, AnaPereira, SusanaFerreira, Tiago M.Zêzere, José L.Melo, RaquelVaz, TeresaOliveira, Sérgio C.Garcia, Ricardo A.C.Santos, Pedro P.Reis, EusébioLourenço, Paulo B.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T19:33:11Zoai:dspace.uevora.pt:10174/32492Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T01:21:27.719621Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
title On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
spellingShingle On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
Cardoso, Ana
title_short On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
title_full On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
title_fullStr On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
title_full_unstemmed On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
title_sort On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area
author Cardoso, Ana
author_facet Cardoso, Ana
Pereira, Susana
Ferreira, Tiago M.
Zêzere, José L.
Melo, Raquel
Vaz, Teresa
Oliveira, Sérgio C.
Garcia, Ricardo A.C.
Santos, Pedro P.
Reis, Eusébio
Lourenço, Paulo B.
author_role author
author2 Pereira, Susana
Ferreira, Tiago M.
Zêzere, José L.
Melo, Raquel
Vaz, Teresa
Oliveira, Sérgio C.
Garcia, Ricardo A.C.
Santos, Pedro P.
Reis, Eusébio
Lourenço, Paulo B.
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.author.fl_str_mv Cardoso, Ana
Pereira, Susana
Ferreira, Tiago M.
Zêzere, José L.
Melo, Raquel
Vaz, Teresa
Oliveira, Sérgio C.
Garcia, Ricardo A.C.
Santos, Pedro P.
Reis, Eusébio
Lourenço, Paulo B.
description This work aims to assess the physical vulnerability of buildings (PVB) exposed to landslides that can be triggered by rainfall and earthquake in the Lisbon metropolitan area (LMA). Susceptibility to landslides triggered by rainfall was assessed with a statistical model (Information Value), using seven predisposing factors: slope, aspect, geology, curvature, land use, and topographic wetness and position (TPI) indexes. A landslide inventory containing 4k landslides identified in the Lisbon and Tagus Valley region was used. The ROC curve of this model produced an AUC of 0.92. In this approach, the area defined as most susceptible was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 1 m and an accumulated material height of 0.5 m. Susceptibility to landslides triggered by earthquakes was assessed with an Analytic Hierarchy Process to achieve the relative weights based on the Saaty’s scale of influence using six predisposing factors: slope, curvature, TPI, geology, PGA and distance to faults. The results of this model were compared with a historical inventory of landslides triggered by earthquakes in the LMA obtained from documental sources (Vaz and Zêzere, 2016). The area most susceptible to landslides (8th and 9th deciles) was selected to assess the PVB for each exposed building to landslides with a slip surface depth of 3 m and an accumulated material height of 1 m. In both cases, the PVB assessment considered all exposed buildings with a residential function surveyed in the 2011 Census (Georeferenced Buildings Database - BGE), including the following parameters: construction material, presence of reinforced structure, number of floors, conservation status, and need for repairs in the structure and finishes. Each parameter was divided into a set of building classes obtained from BGE. A score was given to each building class and the respective parameter. Both scores and parameters’ weights are based on expert opinion and dedicated literature (Guillard-Gonçalves et al., 2016; Pereira et al., 2020). The analysis allowed us to observe meaningful regional multi-hazard potential interactions between earthquake and rainfall triggered landslides which can generate, in space and time, a complex level of damages scenarios for residential buildings. Additionally, it contributes to identifying risk hotspots and possible risk adaptation and mitigation measures.
publishDate 2022
dc.date.none.fl_str_mv 2022-08-31T11:36:34Z
2022-08-31
2022-01-01T00:00:00Z
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https://doi.org/Cardoso, A., Pereira, S., Ferreira, T. M., Zêzere, J. L., Melo, R., Vaz, T., Oliveira, S. C., Garcia, R. A. C., Pinto Santos, P., Reis, E., and Lourenço, P. B.: On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area, 10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022, ICG2022-557, https://doi.org/10.5194/icg2022-557, 2022.
http://hdl.handle.net/10174/32492
https://doi.org/10.5194/icg2022-557
url http://hdl.handle.net/10174/32492
https://doi.org/Cardoso, A., Pereira, S., Ferreira, T. M., Zêzere, J. L., Melo, R., Vaz, T., Oliveira, S. C., Garcia, R. A. C., Pinto Santos, P., Reis, E., and Lourenço, P. B.: On the physical vulnerability of buildings exposed to landslide hazard: application to the Lisbon Metropolitan Area, 10th International Conference on Geomorphology, Coimbra, Portugal, 12–16 Sep 2022, ICG2022-557, https://doi.org/10.5194/icg2022-557, 2022.
https://doi.org/10.5194/icg2022-557
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