干旱区生态环境知识资源中心(Arid): Triggering factors, behavior, and social impact of the January 2021 hail-debris flows at the Central Valley of Chile

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DOI	10.1007/s10346-021-01830-2
	Triggering factors, behavior, and social impact of the January 2021 hail-debris flows at the Central Valley of Chile
	Romero, Jorge E.; Vergara-Pinto, Francisca; Aguilar, German; Garces, Alex; Montserrat, Santiago
通讯作者	Romero, JE (corresponding author)，Univ Manchester, Dept Earth & Environm Sci, Manchester, Lancs, England.
来源期刊	LANDSLIDES
ISSN	1612-510X
EISSN	1612-5118
出版年	2022
卷号	19 期号:4 页码:865-883
英文摘要	An extreme precipitation event produced catastrophic debris flows in central Chile during 29-31 January 2021 (austral summer). Our study focuses on the triggering factors and dynamic behavior of hail-debris flows affecting the small commune of Malloa (Central Valley), which caused 200 injured individuals and 73 damaged houses. We carried out a post-event detailed field mapping of the local geology, the erosional features on the ravines, and its related hail-debris flow deposits. In parallel, the study involved a socio-cultural analysis of vulnerability to debris flows, with a particular focus on the disaster experience of the local community. Our results indicate that these hail-debris flows were likely conditioned by extended drought, local geomorphology, bedrock weathering/alteration, and water-oversaturated soil by two antecedent precipitation pulses. Soil erosion triggered by a hailstorm during a third precipitation pulse initiated hail-debris flows from small basins (< 1.2 km(2)). Basin concentration times were estimated in 6-8 min, while hail reduced flow resistance by interparticle lubrication, promoting peak flow velocities near 2.4 to 5.5 m/s. Debris flow risk management should focus on developing suitable infrastructure and installing capacities at the local level as an essential condition for implementing subsequent inter-sectoral actions (for prevention, mitigation, and design risk scenarios).
英文关键词	Extreme precipitation event Climate change Vulnerability Disaster risk Chile Debris flow Hailstorm
类型	Article
语种	英语
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000749097000001
WOS关键词	RISK PERCEPTION ; ATACAMA DESERT ; DISASTER ; EROSION ; VULNERABILITY ; PARAMETERS ; HAZARD ; EVENT ; NEED
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS研究方向	Engineering ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376511
作者单位	[Romero, Jorge E.] Univ Manchester, Dept Earth & Environm Sci, Manchester, Lancs, England; [Vergara-Pinto, Francisca] Univ Los Lagos, Ctr Estudios Desarrollo Reg & Polit Publ, Osorno, Chile; [Aguilar, German; Garces, Alex; Montserrat, Santiago] Univ Chile, Adv Min & Technol Ctr, Santiago, Chile
推荐引用方式 GB/T 7714	Romero, Jorge E.,Vergara-Pinto, Francisca,Aguilar, German,et al. Triggering factors, behavior, and social impact of the January 2021 hail-debris flows at the Central Valley of Chile[J],2022,19(4):865-883.
APA	Romero, Jorge E.,Vergara-Pinto, Francisca,Aguilar, German,Garces, Alex,&Montserrat, Santiago.(2022).Triggering factors, behavior, and social impact of the January 2021 hail-debris flows at the Central Valley of Chile.LANDSLIDES,19(4),865-883.
MLA	Romero, Jorge E.,et al."Triggering factors, behavior, and social impact of the January 2021 hail-debris flows at the Central Valley of Chile".LANDSLIDES 19.4(2022):865-883.