气候变化领域集成服务门户(CCPortal): Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation

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DOI	10.1038/s41561-019-0444-1
	Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation
	Bradley K.; Mallick R.; Andikagumi H.; Hubbard J.; Meilianda E.; Switzer A.; Du N.; Brocard G.; Alfian D.; Benazir B.; Feng G.; Yun S.-H.; Majewski J.; Wei S.; Hill E.M.
发表日期	2019
ISSN	17520894
卷号	12 期号:11
英文摘要	The death toll and economic impact of an earthquake can be greatly exacerbated if seismic ground shaking triggers landslides. Earthquake-triggered landslides typically occur in two different contexts: localized failure of steep slopes and resulting landslides that pose a major threat to life in areas below; and lateral spreading of nearly flat sediment plains due to shaking-induced liquefaction, which can damage large areas of critical infrastructure. Unexpected catastrophic landsliding triggered by the 28 September 2018 earthquake at Palu, Indonesia did not occur in either typical context, but produced both destructive outcomes. Here, we show that alluvial ground failure in the Palu Valley was a direct consequence of irrigation creating a new liquefaction hazard. Aqueduct-supported cultivation, primarily of wet rice, raised the water table to near ground level, saturating sandy alluvial soils that liquefied in response to strong ground shaking. Large-displacement lateral spreads occurred on slopes of 1°. Slopes steeper than 1.5° sourced long-runout landslides and debris flows that swept through villages occupying the gentler slopes below. The resulting damage and loss of life would probably not have occurred in the absence of a raised water table. Earthquake-triggered landsliding of gentle, irrigated alluvial slopes is an under-recognized, but avoidable, anthropogenic hazard. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	catastrophic event; cultivation; earthquake trigger; economic impact; landslide; rice; slope; Indonesia
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124582
作者单位	Asian School of the Environment, Nanyang Technological University, Singapore, Singapore; Earth Observatory of Singapore, Nanyang Technological University, Singapore, Singapore; Department of Earth Sciences, Durham University, Durham, United Kingdom; Tsunami Disaster and Mitigation Research Center, Syiah Kuala University, Banda Aceh, Indonesia; School of Geosciences, University of Sydney, Sydney, NSW, Australia; School of Geosciences and Info-Physics, Central South University, Changsha, China; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States
推荐引用方式 GB/T 7714	Bradley K.,Mallick R.,Andikagumi H.,et al. Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation[J],2019,12(11).
APA	Bradley K..,Mallick R..,Andikagumi H..,Hubbard J..,Meilianda E..,...&Hill E.M..(2019).Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation.Nature Geoscience,12(11).
MLA	Bradley K.,et al."Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation".Nature Geoscience 12.11(2019).