Mass movement and formation process analysis of the two sequential landslide dam events in Jinsha River, Southwest China

Li, Haibo; Qi, Suitao; Chen, Hao; Liao, Hai-mei; Cui, Yifei; Zhou, Jia‐wen

doi:10.1007/s10346-019-01254-z

Cited by 48 publications

(25 citation statements)

References 29 publications

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“…The successive Baige landslide event is typical basin geological disaster, which caused breaching flood to destroy numerous roads, bridges, and houses, consequently leading to significant economic losses (Fan et al 2019;Li et al 2019). According to our field survey, compared with other catastrophic landslides in China, such as Yigong landslide (Yin 2011), Guanling landslide (Yin et al 2011), and Jiweishan landslide (Zhang et al 2019), the occurrence of such catastrophic landslide is particularly associated with its complex development environment.…”

Section: Discussionmentioning

confidence: 87%

“…Lots of previous researches have exhibited the background of the Baige landslide ("the Baige landslide" used in this study mainly refers to the first Baige landslide), such as Xu et al (2018), Fan et al (2019), Li et al (2019), andOuyang et al (2019). However, constrains induced by the time and depth of the field survey led to certain limitations of the content presented.…”

Section: Background Of the Baige Landslidementioning

confidence: 99%

“…The Baige landslide occurred on the right bank of the Jinsha River in Tibet, China, and experienced two large-scale mass movement processes on October 10 (22:05, Beijing time) and November 3 (17:15, Beijing time), 2018, respectively (Fan et al 2019;Li et al 2019;Ouyang et al 2019). According to our multistage remote sensing images, in the first landslide,~34 × 10 6 m 3 sliding masses rushed into the valley of the Jinsha River, forming a landslide dam with an approximate volume of 24 × 10 6 m 3 and leaving another~10 × 10 6 m 3 material on the sliding surface.…”

Section: Background Of the Baige Landslidementioning

confidence: 99%

“…The previous researches on the initiation mechanism of the Baige landslide are more focused on the observation of long-term deformation-failure process from optical remote-sensing images and InSAR techniques (Fan et al 2019;Li et al 2019). However, these researches are less concerned with the structure of geological body, so that the following issues concerning the initiation mechanism of the Baige landslide need to be further clarified: (i) What are the crucial endogenic and exogenic factors?…”

Section: Initiation Mechanism Of the Baige Landslidementioning

confidence: 99%

“…These studies used optical remote-sensing images and InSAR techniques, and concluded that this landslide experienced deformation for at least 50 years (especially more than 40 m observed in the past decade) and numerous cracks propagated along the ridge and sliding direction, contributing to the landslide in a limit equilibrium state (Xu et al 2018;Fan et al 2019). They also speculated that sustained rainfall was a short-term factor triggering this event based on the precipitation data (Xu et al 2018;Fan et al 2019;Li et al 2019;Ouyang et al 2019;Yang et al 2019). We fully agree with the macroscopic understanding of the landslide mechanism presented by these studies, which can be summarized as long-term creep coupling with short-term rainfall.…”

Section: Introductionmentioning

confidence: 99%

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Initiation mechanism of the Baige landslide on the upper reaches of the Jinsha River, China

Zhang

Yin

et al. 2020

Landslides

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This paper provides newly found and profound insight into the initiation mechanism of the first Baige landslide occurred on the upper reaches of the Jinsha River in October 10, 2018. The detailed geological characteristics are interpreted by comprehensive field surveys in the past year, which indicate that the Baige landslide developed in the Jinsha River tectonic suture zone, and the active tectogenesis significantly contributes to broken stratigraphic structures and complex spatial distribution of lithologies. The initiation is considered to be long-term creep under the exogenic and endogenic integration, while the active tectogenesis and the influence of serpentinite and foliation, respectively, are the primary exogenic and endogenic factors. In addition, this creep process can be analyzed within three stages: evolution and formation of failure-prone geological structures, progressive deformation and fracturing, and shear failure of the locking section. The distribution and easily degraded behavior of the serpentinite are the fundamental, enabling the formation of failure-prone structures and also responsible for the subsequent deformation evolution. The foliation controls the toppling deformation-failure mode and direction. Furthermore, this catastrophic landslide further reminds us to pay attention to the landslides along the upper reaches of the Jinsha River, and our preliminary results indicate that the distribution characteristics of landslides significantly depend on the Jinsha River tectonic suture zone and the serpentinite mélange belt and thus are always associated with tectonically induced damage.

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Section: Discussionmentioning

confidence: 87%

Section: Background Of the Baige Landslidementioning

confidence: 99%

Section: Background Of the Baige Landslidementioning

confidence: 99%

Section: Initiation Mechanism Of the Baige Landslidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Initiation mechanism of the Baige landslide on the upper reaches of the Jinsha River, China

Zhang

Yin

et al. 2020

Landslides

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Kinematic process and mechanism of the two slope failures at Baige Village in the upper reaches of the Jinsha River, China

Chen

Gao

Zhao

et al. 2021

Bull Eng Geol Environ

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The two landslides are located in the upper reaches of the Jinsha River and both dammed the river. Immediately since the slides, the authors have been working on the slides and help disaster reduction. Based on the data collected by April 2020, this paper is aimed at clarifying the geological condition of the slides and at explaining why the slides occurred and what the whole sliding process was. Conclusions are summarized as follows. First, the two landslides occurred in the suture belt of the Jinsha River and the rocks are composed of tectonic mélange slices of mainly gneiss intermingled with carboniferous slate and marble and with intruded serpentine and granite porphyry. The gneiss generally bears a schistosity plane with an averaged attitude of N47°W/47°, dipping into the slope. Secondly, long-term geomorphological evolution of the bank slope due to river incision contributed to the progressive slope deformation for the development of the "10.10" rockslide. No preferential joints exist in the slope, but alteration and weathering played important roles in its occurrences. Rainfall and earthquakes may also accelerate its deformation. Thirdly, the "10.10" rockslide is of high-speed wedge-like slope failure with a high-position and a high-shear outlet. Its sliding and deposition process demonstrate special features as initial speed, collision between debris, surging waterjet, and second slipping. Fourthly, the whole process of the "10.10" rockslide can be divided into 6 steps, i.e., startup of the major sliding and sliding resistance zones, sliding initiation of the trailing zone, formation of debris-eroded zones, collision of debris and triggering waterjet and mist, secondary slip of the landslide dam, and surface flush in the deposition area. The estimated speed may reach as high as 67 m/s. Fifthly, the "11.3" rockslide follows a different mode, i.e., wedge cleaving effect. And finally, the cracked zones still have the risk to constitute a potential landslide and to dam the river again.

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Dynamic evolution mechanism and subsequent reactivated ancient landslide analyses of the “6.17” Danba sequential disasters

Jiang

et al. 2022

Bull Eng Geol Environ

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Mass movement and formation process analysis of the two sequential landslide dam events in Jinsha River, Southwest China

Cited by 48 publications

References 29 publications

Initiation mechanism of the Baige landslide on the upper reaches of the Jinsha River, China

Initiation mechanism of the Baige landslide on the upper reaches of the Jinsha River, China

Kinematic process and mechanism of the two slope failures at Baige Village in the upper reaches of the Jinsha River, China

Dynamic evolution mechanism and subsequent reactivated ancient landslide analyses of the “6.17” Danba sequential disasters

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