The long-term evolution of landslide activity near the epicentral area of the 2008 Wenchuan earthquake in China

Chen, M.; Tang, Chuan; Xiong, Jiang; Shi, Qinyun; Li, N.; Gong, Lingfeng; Wang, X.D.; Tie, Yongbo

doi:10.1016/j.geomorph.2020.107317

Cited by 89 publications

(65 citation statements)

References 53 publications

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“…(2020) explained a step‐by‐step procedure for selecting the LCF which involves identifying and selecting all geo‐environmental factors available for the study area, followed by collinearity tests and feature selection algorithms. Therefore, we initially selected a large set of independent variables from the literature (lithologic, tectonic, topographic, hydrologic, and seismic factors) that may explain the governing mechanisms and spatial distribution of coseismic landslides (e.g., Carro et al., 2003; Y. Chen et al., 2020; Lee et al., 2008; Nowicki Jessee et al., 2018) as well as of “nonseismic” landslides in our study area (Table 1 and Text , supporting information). The distribution and volume of coseismic landslides also may have a significant impact on the distribution of postseismic remobilizations.…”

Section: Methodsmentioning

confidence: 99%

“…Such inventories are essential for understanding the spatiotemporal patterns of future landslides. To the best of our knowledge, only a few studies have mapped these occurrences systematically in worldwide earthquake cases (Dahlquist & West, 2019; R. L. Fan et al., 2018a; Lin et al., 2004; Shafique, 2020; Shou et al., 2011; Tian et al., 2020), and in limited areas affected by the Wenchuan Earthquake (M. Chen et al., 2020; X. Fan et al., 2019b; Shen et al., 2020; Tang et al., 2016; Yang et al., 2017, 2018), yet no multitemporal postseismic susceptibility and controlling factor assessments have been attempted thus far.…”

Section: Introductionmentioning

confidence: 99%

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Rapidly Evolving Controls of Landslides After a Strong Earthquake and Implications for Hazard Assessments

Fan

Yunus

Scaringi

et al. 2021

Geophysical Research Letters

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Rainfall-induced remobilizations of coseismic landslide deposits, propagating from hillslopes to downstream (Dahlquist & West, 2019), are a typical hazard in areas affected by earthquake-induced landslides (X. Fan et al., 2019a). These deposits are typically constituted by loose materials with significant amounts of fines, hence they are susceptible to sudden collapse and liquefaction upon loss of suction or pore water pressure increase (Hu et al., 2017, 2018). Debris remobilization events may occur in the earthquake-affected areas for years or decades (Hovius et al., 2011; Keefer, 1994; Yunus et al., 2020), even multiple times in the same deposit, largely depending on the volumes of coseismic deposits and rainfall intensities (Dadson et al., 2004; Hovius et al., 1997; Marc et al., 2016). Together with delayed (postseismic) slope failures, they concur to the generation of destructive debris flows, posing an additional threat to areas already hit by the earthquake. Where these remobilizations evolved into debris flows, such as in Wenchuan county (China), they caused human losses and extensive damage to property and infrastructure (Tang et al., 2011; Q. Xu

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rapidly Evolving Controls of Landslides After a Strong Earthquake and Implications for Hazard Assessments

Fan

Yunus

Scaringi

et al. 2021

Geophysical Research Letters

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“…1). These earthquakes correspond to: (1) 1993 Finisterre (Papua New Guinea, M w=6.9) (Marc et al 2015), (2) 1999 Chi-Chi (Taiwan, Mw=7.7) (Shou et al 2011a;Marc et al 2015), (3) 2004 Niigata (Japan, Mw=6.6) (Marc et al 2015), (4) 2005 Kashmir (India-Pakistan, Mw=7.6) (Saba et al 2010; Shafique 2020), (5) 2008 Iwate (Japan, Mw=6.9) (Marc et al 2015(Marc et al ), (6) 2008 Wenchuan (China, Mw=7.9) (e.g., Tang et al 2016;Zhang et al 2016;Yang et al 2017;Fan et al 2018;Chen et al 2020b), (7) 2012 Haida Gwaii (Canada, Mw=7.8) (Barth et al 2020) and 92015 Gorkha (Nepal, Mw=7.8) (Marc et al 2019;Kincey et al 2021). On the basis of the analyses executed on these events, there is a general agreement that earthquakes elevate the landslide susceptibility in post-seismic periods.…”

Section: Introductionmentioning

confidence: 99%

New insight into post-seismic landslide evolution processes in the tropics

Tanyaş¹,

Kirschbaum²,

Görüm³

et al. 2021

Preprint

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Earthquakes do not only trigger landslides in co-seismic phases but also elevate post-seismic landslide susceptibility either by causing a strength reduction in hillslope materials or by producing co-seismic landslide deposits, which are prone to further remobilization under the external forces generated by subsequent rainfall events. However, we still have limited observations regarding the post-seismic landslide processes. And, the examined cases are rarely representative for tropical conditions where the precipitation regime is strong and persistent. Therefore, in this study, we introduce three new sets of multi-temporal landslide inventories associated with subsets of the areas affected by (1) 2016 Reuleuet (Indonesia, Mw=6.5), (2) 2018 Porgera (Papua New Guinea, Mw=7.5) and (3) 2012 Sulawesi (Indonesia, Mw=6.3), 2017 Kasiguncu (Indonesia, Mw=6.6) and 2018 Palu (Indonesia, Mw=7.5) earthquakes. Overall, our findings show that that the landslide susceptibility level associated with the occurrences of new landslides could return to pre-seismic conditions in less than a year if the given area is exposed to prolonged and strong precipitation.

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“…After the earthquake, the secondary geological disasters in the disaster area entered an active period. Geological disasters such as landslides and mudslides will exist for a long time and form a disaster chain, which severely restricts the later restoration and reconstruction of the eco-environment [7][8][9][10][11][12]. Therefore, the ecoenvironment issues in the Sichuan earthquake-stricken area have long attracted continuous attention from domestic and foreign scholars.…”

Section: Introductionmentioning

confidence: 99%

Dynamics and Change Features of the Eco-Environment Restoration in the Worst Hit Area of a Strong Earthquake

Duan¹,

Xiang²,

Yang³

et al. 2020

IJSDP

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The 2008 Sichuan Earthquake brought severe damage and long-lasting impact to the ecoenvironment in the disaster area. To restore and protect the eco-environment, it is important to grasp the eco-environmental situation of the disaster area in a rapid, accurate, and dynamic manner. With the aid of geographical information system (GIS), this paper extracts the key parameters of the eco-environment, and establishes an evaluation index system for ecoenvironment quality. On this basis, the eco-environment quality of the disaster area was evaluated based on the 2007-2017 Landsat remote sensing images, using the analytic network process (ANP). The results show that the eco-environment quality of the disaster area was improving, but the restoration process varied greatly around fault zone and on river banks, which should be the focal points of monitoring; the spatiotemporal difference in ecoenvironment restoration is mainly attributable to the development degree of secondary geological disasters, and indirectly caused by formation lithology; there was a huge gap between the restoration speeds of artificial restoration area and natural restoration area, but the gap narrowed over time. The research results provide the basis for scientific decision-making on eco-environment repair and restoration in places similar to the disaster area, promoting the green economy and living condition in those regions.

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The long-term evolution of landslide activity near the epicentral area of the 2008 Wenchuan earthquake in China

Cited by 89 publications

References 53 publications

Rapidly Evolving Controls of Landslides After a Strong Earthquake and Implications for Hazard Assessments

Rapidly Evolving Controls of Landslides After a Strong Earthquake and Implications for Hazard Assessments

New insight into post-seismic landslide evolution processes in the tropics

Dynamics and Change Features of the Eco-Environment Restoration in the Worst Hit Area of a Strong Earthquake

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