Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1007/s11069-021-04811-9 http://hdl.handle.net/11449/206420 |
Resumo: | Debris flows represent great hazard to humans due to their high destructive power. Understanding their hydrogeomorphic dynamics is fundamental in hazard assessment studies, especially in subtropical and tropical regions where debris flows have scarcely been studied when compared to other mass-wasting processes. Thus, this study aims at systematically analyzing the meteorological and geomorphological factors that characterize a landslide-triggered debris flow at the Pedra Branca catchment (Serra do Mar, Brazil), to quantify the debris flow’s magnitude, peak discharge and velocity. A magnitude comparison with empirical equations (Italian Alps, Taiwan, Serra do Mar) is also conducted. The meteorological analysis is based on satellite data and rain gauge measurements, while the geomorphological characterization is based on terrestrial and aerial investigations, with high spatial resolution. The results indicate that it was a large-sized stony debris flow, with a total magnitude of 120,195 m3, a peak discharge of 2146.7 m3 s−1 and a peak velocity of 26.5 m s−1. The debris flow was triggered by a 188-mm rainfall in 3 h (maximum intensity of 128 mm h−1), with an estimated return period of 15 to 20 years, which, combined with the intense accumulation of on-channel debris (ca. 37,000 m3), indicates that new high-magnitude debris flows in the catchment and the region are likely to occur within the next two decades. The knowledge of the potential frequency and magnitude (F–M) can support the creation of F–M relationships for Serra do Mar, a prerequisite for reliable hazard management and monitoring programs. |
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Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in BrazilBedrock riversForensic geomorphological analysisMagnitudeMass movementsSerra do MarShallow landslidesDebris flows represent great hazard to humans due to their high destructive power. Understanding their hydrogeomorphic dynamics is fundamental in hazard assessment studies, especially in subtropical and tropical regions where debris flows have scarcely been studied when compared to other mass-wasting processes. Thus, this study aims at systematically analyzing the meteorological and geomorphological factors that characterize a landslide-triggered debris flow at the Pedra Branca catchment (Serra do Mar, Brazil), to quantify the debris flow’s magnitude, peak discharge and velocity. A magnitude comparison with empirical equations (Italian Alps, Taiwan, Serra do Mar) is also conducted. The meteorological analysis is based on satellite data and rain gauge measurements, while the geomorphological characterization is based on terrestrial and aerial investigations, with high spatial resolution. The results indicate that it was a large-sized stony debris flow, with a total magnitude of 120,195 m3, a peak discharge of 2146.7 m3 s−1 and a peak velocity of 26.5 m s−1. The debris flow was triggered by a 188-mm rainfall in 3 h (maximum intensity of 128 mm h−1), with an estimated return period of 15 to 20 years, which, combined with the intense accumulation of on-channel debris (ca. 37,000 m3), indicates that new high-magnitude debris flows in the catchment and the region are likely to occur within the next two decades. The knowledge of the potential frequency and magnitude (F–M) can support the creation of F–M relationships for Serra do Mar, a prerequisite for reliable hazard management and monitoring programs.Applied Geology Department Earth and Exact Sciences Institute São Paulo State University – UNESP, Av. 24A, 1555Geo- und Umweltforschungszentrum (GUZ) University of Tübingen, Schnarrenbergstraße 94-96Institute for Technological Research – IPT, Av. Prof. Almeida Prado, 532Brazilian Geological Service – CPRM, Rua Costa, 55Institute of Astronomy Geophysics and Atmospheric Sciences University of São Paulo – USP, Rua do Matão, 1226National Institute for Space Research – INPE, Av. dos Astronautas, 1758Centro de Pesquisas e Desenvolvimento – CENPES, Av. Horácio de Macedo, 950Applied Geology Department Earth and Exact Sciences Institute São Paulo State University – UNESP, Av. 24A, 1555Universidade Estadual Paulista (Unesp)University of TübingenInstitute for Technological Research – IPTBrazilian Geological Service – CPRMUniversidade de São Paulo (USP)National Institute for Space Research – INPECentro de Pesquisas e Desenvolvimento – CENPESCabral, Victor Carvalho [UNESP]Reis, Fábio Augusto Gomes Vieira [UNESP]D’Affonseca, Fernando MazoLucía, Anados Santos Corrêa, Claudia Vanessa [UNESP]Veloso, Vinicius [UNESP]Gramani, Marcelo FischerOgura, Agostinho TadashiLazaretti, Andrea FregolenteVemado, FelipePereira Filho, Augusto Josédos Santos, Claudia CristinaLopes, Eymar Silva SampaioRabaco, Lis Maria Reonido Carmo Giordano, Lucilia [UNESP]Zarfl, Christiane2021-06-25T10:31:47Z2021-06-25T10:31:47Z2021-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1007/s11069-021-04811-9Natural Hazards.1573-08400921-030Xhttp://hdl.handle.net/11449/20642010.1007/s11069-021-04811-92-s2.0-85107041226Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNatural Hazardsinfo:eu-repo/semantics/openAccess2021-10-23T04:33:51Zoai:repositorio.unesp.br:11449/206420Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T04:33:51Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
title |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
spellingShingle |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil Cabral, Victor Carvalho [UNESP] Bedrock rivers Forensic geomorphological analysis Magnitude Mass movements Serra do Mar Shallow landslides |
title_short |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
title_full |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
title_fullStr |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
title_full_unstemmed |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
title_sort |
Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil |
author |
Cabral, Victor Carvalho [UNESP] |
author_facet |
Cabral, Victor Carvalho [UNESP] Reis, Fábio Augusto Gomes Vieira [UNESP] D’Affonseca, Fernando Mazo Lucía, Ana dos Santos Corrêa, Claudia Vanessa [UNESP] Veloso, Vinicius [UNESP] Gramani, Marcelo Fischer Ogura, Agostinho Tadashi Lazaretti, Andrea Fregolente Vemado, Felipe Pereira Filho, Augusto José dos Santos, Claudia Cristina Lopes, Eymar Silva Sampaio Rabaco, Lis Maria Reoni do Carmo Giordano, Lucilia [UNESP] Zarfl, Christiane |
author_role |
author |
author2 |
Reis, Fábio Augusto Gomes Vieira [UNESP] D’Affonseca, Fernando Mazo Lucía, Ana dos Santos Corrêa, Claudia Vanessa [UNESP] Veloso, Vinicius [UNESP] Gramani, Marcelo Fischer Ogura, Agostinho Tadashi Lazaretti, Andrea Fregolente Vemado, Felipe Pereira Filho, Augusto José dos Santos, Claudia Cristina Lopes, Eymar Silva Sampaio Rabaco, Lis Maria Reoni do Carmo Giordano, Lucilia [UNESP] Zarfl, Christiane |
author2_role |
author author author author author author author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) University of Tübingen Institute for Technological Research – IPT Brazilian Geological Service – CPRM Universidade de São Paulo (USP) National Institute for Space Research – INPE Centro de Pesquisas e Desenvolvimento – CENPES |
dc.contributor.author.fl_str_mv |
Cabral, Victor Carvalho [UNESP] Reis, Fábio Augusto Gomes Vieira [UNESP] D’Affonseca, Fernando Mazo Lucía, Ana dos Santos Corrêa, Claudia Vanessa [UNESP] Veloso, Vinicius [UNESP] Gramani, Marcelo Fischer Ogura, Agostinho Tadashi Lazaretti, Andrea Fregolente Vemado, Felipe Pereira Filho, Augusto José dos Santos, Claudia Cristina Lopes, Eymar Silva Sampaio Rabaco, Lis Maria Reoni do Carmo Giordano, Lucilia [UNESP] Zarfl, Christiane |
dc.subject.por.fl_str_mv |
Bedrock rivers Forensic geomorphological analysis Magnitude Mass movements Serra do Mar Shallow landslides |
topic |
Bedrock rivers Forensic geomorphological analysis Magnitude Mass movements Serra do Mar Shallow landslides |
description |
Debris flows represent great hazard to humans due to their high destructive power. Understanding their hydrogeomorphic dynamics is fundamental in hazard assessment studies, especially in subtropical and tropical regions where debris flows have scarcely been studied when compared to other mass-wasting processes. Thus, this study aims at systematically analyzing the meteorological and geomorphological factors that characterize a landslide-triggered debris flow at the Pedra Branca catchment (Serra do Mar, Brazil), to quantify the debris flow’s magnitude, peak discharge and velocity. A magnitude comparison with empirical equations (Italian Alps, Taiwan, Serra do Mar) is also conducted. The meteorological analysis is based on satellite data and rain gauge measurements, while the geomorphological characterization is based on terrestrial and aerial investigations, with high spatial resolution. The results indicate that it was a large-sized stony debris flow, with a total magnitude of 120,195 m3, a peak discharge of 2146.7 m3 s−1 and a peak velocity of 26.5 m s−1. The debris flow was triggered by a 188-mm rainfall in 3 h (maximum intensity of 128 mm h−1), with an estimated return period of 15 to 20 years, which, combined with the intense accumulation of on-channel debris (ca. 37,000 m3), indicates that new high-magnitude debris flows in the catchment and the region are likely to occur within the next two decades. The knowledge of the potential frequency and magnitude (F–M) can support the creation of F–M relationships for Serra do Mar, a prerequisite for reliable hazard management and monitoring programs. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:31:47Z 2021-06-25T10:31:47Z 2021-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1007/s11069-021-04811-9 Natural Hazards. 1573-0840 0921-030X http://hdl.handle.net/11449/206420 10.1007/s11069-021-04811-9 2-s2.0-85107041226 |
url |
http://dx.doi.org/10.1007/s11069-021-04811-9 http://hdl.handle.net/11449/206420 |
identifier_str_mv |
Natural Hazards. 1573-0840 0921-030X 10.1007/s11069-021-04811-9 2-s2.0-85107041226 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Natural Hazards |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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_version_ |
1803047252846968832 |