气候变化领域集成服务门户(CCPortal): Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil

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DOI	10.1007/s11069-021-04811-9
	Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil
	Cabral V.C.; Reis F.A.G.V.; D’Affonseca F.M.; Lucía A.; dos Santos Corrêa C.V.; Veloso V.; Gramani M.F.; Ogura A.T.; Lazaretti A.F.; Vemado F.; Pereira Filho A.J.; dos Santos C.C.; Lopes E.S.S.; Rabaco L.M.R.; do Carmo Giordano L.; Zarfl C.
发表日期	2021
ISSN	0921030X
起始页码	3021
结束页码	3043
卷号	108 期号:3
英文摘要	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. © 2021, The Author(s).
关键词	Bedrock rivers Forensic geomorphological analysis Magnitude Mass movements Serra do Mar Shallow landslides
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206131
作者单位	Applied Geology Department, Earth and Exact Sciences Institute, São Paulo State University – UNESP, Av. 24A, 1555, Rio Claro, São Paulo, Brazil; Geo- und Umweltforschungszentrum (GUZ), University of Tübingen, Schnarrenbergstraße 94-96, Tübingen, Germany; Institute for Technological Research – IPT, Av. Prof. Almeida Prado, 532, São Paulo, São Paulo, Brazil; Brazilian Geological Service – CPRM, Rua Costa, 55, São Paulo, São Paulo, Brazil; Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo – USP, Rua do Matão, 1226, São Paulo, São Paulo, Brazil; National Institute for Space Research – INPE, Av. dos Astronautas, 1758, São José dos Campos, São Paulo, Brazil; Centro de Pesquisas e Desenvolvimento – CENPES, Av. Horácio de Macedo, 950, Rio de Janeiro, Rio de Janeiro, Brazil
推荐引用方式 GB/T 7714	Cabral V.C.,Reis F.A.G.V.,D’Affonseca F.M.,et al. Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil[J],2021,108(3).
APA	Cabral V.C..,Reis F.A.G.V..,D’Affonseca F.M..,Lucía A..,dos Santos Corrêa C.V..,...&Zarfl C..(2021).Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil.Natural Hazards,108(3).
MLA	Cabral V.C.,et al."Characterization of a landslide-triggered debris flow at a rainforest-covered mountain region in Brazil".Natural Hazards 108.3(2021).