Decadal vegetation succession from MODIS reveals the spatio-temporal evolution of post-seismic landsliding after the 2008 Wenchuan earthquake

Yunus, Ali P.; Fan, Xuanmei; Tang, Xiaolu; Dou, Jie; Xu, Qiang; Huang, Runqiu

doi:10.1016/j.rse.2019.111476

Cited by 103 publications

(83 citation statements)

References 57 publications

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“…Finally, in 2017 and 2018, a limited control of coseismic landslide deposits (COS) and VPS was observed, possibly in response to a progressive depletion of fines from the hillslope deposits (Domènech et al., 2019), which decreases the likelihood of hydrologically triggered instability. Revegetation also was observed (reduced NDVI rank) to play a role in limiting soil erosion, and thus runoff‐induced failures (Shen et al., 2020; Yunus et al., 2020). Interestingly, the distance to streams (DTS) became the most important factor, consistently with the higher landslide rates observed in channels and by river sides rather than high on the hillslopes.…”

Section: Resultsmentioning

confidence: 99%

“…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.…”

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: Resultsmentioning

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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“…Landslides pose a threat to the global terrestrial hazards affecting many countries, for example: the Sidoarjo mudflow in Indonesia in 2006 (Wibisana, 2013), the Beichuan landslide in Chania in 2008 (Tang et al, 2011), and the Montecito mudflows in California in 2018 (Donnellan et al, 2018). Other examples include the 2008 Mw 7.9 Wenchuan earthquake causing about 200,000 coseismic landslides in China (Yunus et al, 2020), the 2004 Mw 6.8 Chuetsu and the 2018 Mw 6.6 Hokkaido earthquake-induced over 10000 landslides in Japan (Dou et al, 2020), respectively. Also, dense rainfall in mountainous terrain can seriously trigger numerous landslides in hill slopes in different countries and regions, such as China, Taiwan, Japan, Vietnam, etc.…”

Section: Introductionmentioning

confidence: 99%

Variation in Rayleigh wave ellipticity as a possible indicator of earthflow mobility: a case study of Sobradinho landslide compared with pile load testing

et al. 2020

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Rainfall-induced landslides pose a significant risk to communities and infrastructures. To improve the prediction of such events, it is imperative to adequately investigate the rainfall-dependent dynamics (leading to fluidization) and any associated internal sliding along shear planes within clayey slopes. Therefore, the present study adopted ambient noise analysis based on the Horizontal to Vertical Spectral Ratio (HVSR) method, to measure the seasonal variation of Rayleigh wave ellipticity as an indicator for the internal deformation and transition in the material state. The methodology was applied to an existing landslide, where variations in soil stiffness and internal sliding were expected to occur in response to rainfall. To improve the interpretation of the HVSR results (and hence the prediction of landslide’ reactivation by rainfall), HVSR measurements were also conducted on a field-scale pile load test. The pile test allowed a comparison of the seismic data generated by the soil movement along shear planes. The HVSR curves of this field test showed two frequency peaks with no changes in the resonance. In comparison with the data obtained from the landslide, the resultant HVSR curves showed three frequency patterns: ubiquitous (2Hz), landslide (4-8Hz), and flat (no peak). However, the HVSR curves did not show any response to the expected seasonally induced variations in the landslide mass because of the relatively short data acquisition. Nevertheless, time-lapse HVSR is a promising technique that can complement other geophysical methods for improving landslide monitoring.

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“…in the 10 disaster areas of the Sichuan earthquake, and evaluated the regional ecological restoration. Yunus et al [16] proposed a new automatic quantitative evaluation algorithm VDA for the destruction of vegetation caused by new geological disasters of strong earthquakes, and the quantitative index VRR for the degree of post-earthquake vegetation restoration, thereby quantifying the impact of the Sichuan earthquake induced co-seismic and post-earthquake geological disasters on vegetation.…”

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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Decadal vegetation succession from MODIS reveals the spatio-temporal evolution of post-seismic landsliding after the 2008 Wenchuan earthquake

Cited by 103 publications

References 57 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

Variation in Rayleigh wave ellipticity as a possible indicator of earthflow mobility: a case study of Sobradinho landslide compared with pile load testing

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

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