Identification of ancient river-blocking events and analysis of the mechanisms for the formation of landslide dams in the Suwalong section of the upper Jinsha River, SE Tibetan Plateau

Li, Yongchao; Chen, Jianping; Zhou, Fanqin; Song, Shengyuan; Zhang, Yiwei; Gu, Feifan; Cao, Chen

doi:10.1016/j.geomorph.2020.107351

Cited by 39 publications

(20 citation statements)

References 21 publications

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“…For an ancient river blocking event, there are many nailing researches. A method called the ' trinity ' combination of residual landslide dams, upstream lacustrine sediments and downstream break-outburst sediments was proposed (Chen and Cui 2015; Li et al 2020). In short, the fact that the river is blocked has basically reached a consensus.…”

Section: Methodsmentioning

confidence: 99%

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Sequence Analysis of Several Ancient River Blocking Events in the Suwalong Reach of the Upper Jinsha River Based on Multidisciplinary Approaches, SE Tibetan Plateau

Zhang

Chen

Wang

et al. 2021

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The temporary or permanent river blocking event caused by mass movement usually occurs on steep terrain. With the increase of mountain population and land use pressure and the construction of water conservancy and hydropower projects, river blocking event has gradually attracted people’s attention and understanding. The study area (Wangdalong-Gangda reach) is located in the upper reaches of the Jinsha River and the southeast edge of the Qinghai-Tibet Plateau. Affected by strong tectonic activity in the Jinsha River suture zone and the rapid uplift of the Tibetan Plateau, in the past 6000 years, there have been at least five obvious river blocking events in the reach of about 30 km in the study area. The number and density are very rare. Combined with the field investigation, indoor interpretation, laboratory tests, optically stimulated luminescence (OSL) dating, SBAS-InSAR and previous studies, multidisciplinary approaches are used to systematically summarize the analysis methods and further the understanding of one river blocking event and multiple river blocking events from difference perspectives. Especially in multiple river blocking events, we could get the wrong results, even the opposite conclusion if interaction is not considered. Through this study, the general method of analyzing the river blocking event and the problems that should be paid attention to in sampling are given, and relatively reliable historical results of river blocking events are obtained. This method has extensive applicability to the identification and analysis of river blocking events in other areas.

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Section: Methodsmentioning

confidence: 99%

“…The Qinghai-Tibet Plateau is the highest plateau in the world, and it is still in an upward trend(Chen and Li 2016; Li et al 2020;Li et al 2015). The upper Jinsha River is located on the southeast margin of the Qinghai-Tibet Plateau, signi cantly affected by tectonic uplift.…”

Section: Introductionmentioning

confidence: 99%

Sequence Analysis of Several Ancient River Blocking Events in the Suwalong Reach of the Upper Jinsha River Based on Multidisciplinary Approaches, SE Tibetan Plateau

Zhang

Chen

Wang

et al. 2021

Preprint

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“…The average annual rainfall is less than 400 mm, and more than 70% of precipitation occurs mainly from June to September (Chen et al 2013). The average annual temperature is approximately 16 ℃; however, the highest temperature can reach 35 ℃, and the lowest temperature of − 10 ℃ (Li et al 2020a). Therefore, the dry climate and large daily differences in temperature cause serious weathering and scarce vegetation in this area.…”

Section: Landslidesmentioning

confidence: 99%

“…2, the active Xiongsong-Suwalong Fault is extremely close to the Gangda paleolandslide and is basically parallel to the Jinsha River. The vertical rate and the strike-slip moving rate of the Jinsha River Fault zone can be estimated at 2-3 mm/a and 6-7 mm/a respectively, based on faulted landforms and chronology (Li et al 2020a). In addition, many large-scale landslides and landslide dams have been identified along the Xiongsong-Suwalong Fault zone (Chen et al 2013;Li et al 2020a).…”

Section: Landslidesmentioning

confidence: 99%

“…The Qinghai-Tibet Plateau is the highest plateau on Earth with rapid uplift since the Middle and Late Pleistocene, and a rapid uplift trend has also been shown in the surrounding mountainous areas (Zhan et al 2018). The Jinsha River suture zone, located on the southeastern edge of the Qinghai-Tibet Plateau, is a weak lithospheric belt with intense tectonic activity (Li et al 2020a). Affected by rapid uplift, deep incision, high seismic activity, and active tectogenesis, a large number of landslides have occurred in this region since ancient times (Du et al 2017;Fan et al 2019a).…”

Section: Introductionmentioning

confidence: 99%

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Combined numerical investigation of the Gangda paleolandslide runout and associated dam breach flood propagation in the upper Jinsha River, SE Tibetan Plateau

et al. 2022

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A large paleolandslide occurred opposite the Gangda village in the upper Jinsha River, SE Tibetan Plateau. Field geological investigations and remote sensing indicated that the Gangda paleolandslide once blocked the Jinsha River. Evidence of river blocking, including landslide dam relics, upstream lacustrine sediments, and downstream outburst sediments, has been well preserved. To understand the river-blocking event including landslide, dam breach, and associated outburst flooding, optically stimulated luminescence (OSL) dating and numerical simulations were performed in this study. OSL dating results showed that the paleolandslide dam was formed at 5.4 ± 0.5 ka BP and breached at 3.4 ± 0.3 ka BP, indicating that the dam lasted approximately 2000 years. The discrete element method was used to simulate the dynamics of the Gangda rock landslide based on the restored topography, while a fluid-solid coupling model was performed to simulate the landslide dam breaching and flooding. The fluid-solid coupling model can simultaneously reflect the process of landslide-dam collapse and the propagation of outburst flood. The simulated results indicate that the whole landslide process lasted about 60 s with a peak velocity of 38 m/s. It is significant that the simulated morphology of the residual landslide dam and downstream outburst sediments is consistent with the field observations. The combined numerical investigation in this paper provided new insights into the research of landscape evolution and helped to understand the chain disaster of landslide, dam breach, and flooding.

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Deformation characteristics and reactivated failure modes of the massive Baimu ancient landslide deposit on the northern margin of the East Himalayan syntaxis

Li,

Chen,

Zhou

et al. 2024

Earth Surf Processes Landf

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In the Eastern Himalayan syntaxis, massive Quaternary loose deposits represent a typical product of abrupt topographic changes. Influenced by the Qinghai‐Tibet Plateau uplift and rapid river incision, the partial or complete failure of these deposits is a recurrent phenomenon in alpine‐gorge regions, posing substantial threats to major infrastructure development. Through topographic interpretation and field investigation, this study clarifies the geological features and genetic mechanisms of the Baimu ancient landslide deposit (BALD), located on the northern margin of the East Himalayan syntaxis. The surface deformation time series spanning October 2017 to December 2019 was estimated using employing multitemporal synthetic aperture radar interferometry. Then, the spatiotemporal deformation characteristics of the BALD was analysed by superposing terrain factors, and hazard division was implemented. The results indicate that high‐hazard zones are mainly distributed on high and steep free faces of the BALD. Deformation evolution and rainfall time series showed obvious correlation. Lastly, a generalized failure model is established for the BALD, which will serve as a valuable reference for disaster prevention and is applicable to the study of similar deposits in the Qinghai‐Tibet Plateau.

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Identification of ancient river-blocking events and analysis of the mechanisms for the formation of landslide dams in the Suwalong section of the upper Jinsha River, SE Tibetan Plateau

Cited by 39 publications

References 21 publications

Sequence Analysis of Several Ancient River Blocking Events in the Suwalong Reach of the Upper Jinsha River Based on Multidisciplinary Approaches, SE Tibetan Plateau

Sequence Analysis of Several Ancient River Blocking Events in the Suwalong Reach of the Upper Jinsha River Based on Multidisciplinary Approaches, SE Tibetan Plateau

Combined numerical investigation of the Gangda paleolandslide runout and associated dam breach flood propagation in the upper Jinsha River, SE Tibetan Plateau

Deformation characteristics and reactivated failure modes of the massive Baimu ancient landslide deposit on the northern margin of the East Himalayan syntaxis

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