Source characteristics of long runout rock avalanches triggered by the 2008 Wenchuan earthquake, China

Qi, Shengwen; Liu, Fangzhou; Zhang, Fangfang; Zhou, Yang; Lan, Hengxing; Li, Lihui

doi:10.1016/j.jseaes.2010.05.010

Cited by 76 publications

(42 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Remote sensing interpretation showed that during the Wenchuan earthquake there were a total of 112 large landslides generated, each of which had a plane area greater than 50 000 m 2 , blending of source area and deposition area, and can be classified as a deep-seated landslide or rock avalanche Qi et al, 2011). Among them were many large landslides with a volume bigger than ten millions cubic meters Xu and Li, 2010).…”

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

“…He proposed that the sturzstroms could be compared to flow of a mass of concentrated cohesionless grains in a fluid medium, and found that the coefficient of friction was different when rock fall sizes changed: it decreased above a threshold landslide size of about 100 000 m 3 (Hsü, 1975). Studies about the large landslide mechanisms and characteristics are presented after the Wenchuan earthquake (Sassa et al, 2005;Yin, 2009;Huang et al, 2010;Wu et al, 2010;Qi et al, 2011). Some researchers consider that air cushion effect is important to long run out avalanches (Yin, 2009;Wu et al, 2010).…”

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

“…Some researchers consider that air cushion effect is important to long run out avalanches (Yin, 2009;Wu et al, 2010). Also, it has been found that most of the long run out rock avalanches have source areas with high relief and steep inclination, and that the saturated Holocene loose deposits could be the most important factor causing the long run out rock avalanches (Qi et al, 2011).…”

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Chen

Ran

Yang

2012

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. During the 12 May 2008, Wenchuan earthquake in China, more than 15 000 landslides were triggered by the earthquake. Among these landslides, there were 112 large landslides generated with a plane area greater than 50 000 m 2 . These large landslides were markedly distributed closely along the surface rupture zone in a narrow belt and were mainly located on the hanging wall side. More than 85 % of the large landslides are presented within the range of 10 km from the rupture. Statistical analysis shows that more than 50 % of large landslides occurred in the hard rock and second-hard rock, like migmatized metamorphic rock and carbonate rock, which crop out in the south part of the damaged area with higher elevation and steeper landform in comparison with the northeast part of the damaged area. All large landslides occurred in the region with seismic intensity ≥ X except a few of landslides in the Qingchuan region with seismic intensity IX. Spatially, the large landslides can be centred into four segments, namely the Yingxiu, the Gaochuan, the Beichuan and the Qingchuan segments, from southwest to northeast along the surface rupture. This is in good accordance with coseismic displacements. With the change of fault type from reverse-dominated slip to dextral slip from southwest to northeast, the largest distance between the triggered large landslides and the rupture decreases from 15 km to 5 km. The critical acceleration a c for four typical large landslides in these four different segments were estimated by the Newmark model in this paper. Our results demonstrate that, given the same strength values and slope angles, the characteristics of slope mass are important for slope stability and deeper landslides are less stable than shallower landslides. Comprehensive analysis reveals that the large catastrophic landslides could be specifically tied to a particular geological setting where fault type and geometry change abruptly. This feature may dominate the occurrence of large landslides. The results will be useful for improving reliable assessments of earthquake-induced landslide susceptibility, especially for large landslides which may result in serious damages.

show abstract

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

Section: His Findings About the Relationship Between Landslides Andmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Chen

Ran

Yang

2012

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

show abstract

“…More detailed and specific studies indicate that faults, joints and fissures can control the rock avalanches' occurrence since these faults or joints are potential planes for sliding or detachment (Sun and Cai, 1997;Hermanns and Strecker, 1999). During the 2008 Wenchuan earthquake, lots of large landslides may have occurred on pre-existing fractures or discontinuities that were undetectable prior to the earthquake at sites with fractured rocks (Qi et al, 2011;Chen et al, 2012). Based on an analysis of geology, geomorphology and lithology of slopes which are prone to large slope failures, unusually large landslides occur in settings with specific geological control.…”

Section: Unloading Rock Fissuresmentioning

confidence: 99%

Contributing factors to the failure of an unusually large landslide triggered by the 2014 Ludian, Yunnan, China, <i>M</i><sub>s</sub>  =  6.5 earthquake

Chang

Chen

et al. 2016

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. The 3 August 2014 Ludian, China, Ms  =  6.5 earthquake caused many large landslides. The biggest occurred at Hongshiyan near the epicenter, had a volume of 1.0  ×  107 m3 and dammed the Niulanjiang River, creating a large lake. Post-event field investigations yielded detailed data on the following aspects: rock structure of the landslide, the local lithology and geometry of the area around the landslide dam and composition and grain sizes of the debris avalanche. Based on these data, this work analyzes the geology and topography of the Hongshiyan area, and explores reasons for the occurrence of an unusually large landslide at this location. Our analysis suggests the following conditions are responsible for this catastrophic event. (1) Due to recent crustal deformation, intense incision on the river increased topographic relief with steep slopes and scarps. (2) Combined structures, including unloading fissures, high-angle joints and low-angle beds along the river, as well as an upper-strong and lower-weak interlayer structure on the slope, especially the existence of weak layers in the slope, are important factors that contribute to this large failure. (3) Hongshiyan lies near an active fault, where intense crustal deformation has resulted in rock fractures and weathering, and frequent earthquakes may progressively reduce the strength of the slope. (4) During the Ms  =  6.5 earthquake, the terrain and site conditions led to abnormally strong ground shaking. The combined impacts of these factors triggered a very large landslide during a moderate-sized earthquake.

show abstract

“…Note: ※ data from Huang et al ( 2011a ); ♥ data from Wu et al ( 2010 ); ♠ data from Qi et al ( 2011 ); ◎ data from Chigira et al( 2010 ); and ☼ data from Yin et al( 2009a ); ♣ Estimated indirectly from geological sections or description. ♀ notes the value is mean one if the number of data more than one.…”

Section: Large Number Of Landslide Damsmentioning

confidence: 99%

Earthquake Induced a Chain Disasters

Chen¹,

Li²,

Zhang³

et al. 2012

Earthquake Research and Analysis - Statistical Studies, Observations and Planning

View full text Add to dashboard Cite

Source characteristics of long runout rock avalanches triggered by the 2008 Wenchuan earthquake, China

Cited by 76 publications

References 14 publications

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Contributing factors to the failure of an unusually large landslide triggered by the 2014 Ludian, Yunnan, China, <i>M</i><sub>s</sub>  =  6.5 earthquake

Earthquake Induced a Chain Disasters

Contact Info

Product

Resources

About

Source characteristics of long runout rock avalanches triggered by the 2008 Wenchuan earthquake, China

Cited by 76 publications

References 14 publications

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Evaluation of factors controlling large earthquake-induced landslides by the Wenchuan earthquake

Contributing factors to the failure of an unusually large landslide triggered by the 2014 Ludian, Yunnan, China, &lt;i&gt;M&lt;/i&gt;&lt;sub&gt;s&lt;/sub&gt; = 6.5 earthquake

Earthquake Induced a Chain Disasters

Contact Info

Product

Resources

About

Contributing factors to the failure of an unusually large landslide triggered by the 2014 Ludian, Yunnan, China, <i>M</i><sub>s</sub>  =  6.5 earthquake