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DOI | 10.1038/s41561-019-0444-1 |
Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation | |
Bradley, Kyle1,2; Mallick, Rishav1,2; Andikagumi, Harisma3; Hubbard, Judith1,2; Meilianda, Ella4; Switzer, Adam1,2; Du, Nairong1; Brocard, Gilles5; Alfian, Dedy; Benazir, Benazir; Feng, Guangcai6; Yun, Sang-Ho7; Majewski, Jedrzej1,2; Wei, Shengji1,2; Hill, Emma M.1,2 | |
2019-11-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2019 |
卷号 | 12期号:11页码:935-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Singapore; England; Indonesia; Australia; Peoples R China; USA |
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 degrees. Slopes steeper than 1.5 degrees 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. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000493905700016 |
WOS关键词 | LIQUEFACTION ; SUPERSHEAR ; FAULT |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/223766 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Nanyang Technol Univ, Asian Sch Environm, Singapore, Singapore; 2.Nanyang Technol Univ, Earth Observ Singapore, Singapore, Singapore; 3.Univ Durham, Dept Earth Sci, Durham, England; 4.Syiah Kuala Univ, Tsunami Disaster & Mitigat Res Ctr, Banda Aceh, Indonesia; 5.Univ Sydney, Sch Geosci, Sydney, NSW, Australia; 6.Cent S Univ, Sch Geosci & Infophys, Changsha, Hunan, Peoples R China; 7.CALTECH, Jet Prop Lab, Pasadena, CA USA |
推荐引用方式 GB/T 7714 | Bradley, Kyle,Mallick, Rishav,Andikagumi, Harisma,et al. Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation[J]. NATURE GEOSCIENCE,2019,12(11):935-+. |
APA | Bradley, Kyle.,Mallick, Rishav.,Andikagumi, Harisma.,Hubbard, Judith.,Meilianda, Ella.,...&Hill, Emma M..(2019).Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation.NATURE GEOSCIENCE,12(11),935-+. |
MLA | Bradley, Kyle,et al."Earthquake-triggered 2018 Palu Valley landslides enabled by wet rice cultivation".NATURE GEOSCIENCE 12.11(2019):935-+. |
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