Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau

Wu, Cao; Hu, Kaiheng; Liu, Weiming; Wang, Hao; Hu, Xudong; Zhang, Xiaopeng

doi:10.1016/j.geomorph.2020.107293

Cited by 19 publications

(6 citation statements)

References 73 publications

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“…Moreover, the annual deformation rate of most landslides is >100 mm/year and the volume is >1 km 2 . For example, the famous Yigong landslide occurred along the Palalung Zangbo River [22,23]. Regarding the coastal area of the Jinsha River (Figure 6b), several large-scale landslides were distributed in this area and the deformation rates of these slopes were all >100 mm/year, with a maximum of 180 mm/year.…”

Section: Time-series Monitoring For Typical Landslidesmentioning

confidence: 99%

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Landslide Detection in the Linzhi–Ya’an Section along the Sichuan–Tibet Railway Based on InSAR and Hot Spot Analysis Methods

et al. 2021

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Construction of the 998.64-km Linzhi–Ya’an section of the Sichuan‒Tibet Railway has been influenced by landslide disasters, threatening the safety of Sichuan‒Tibet railway projects. Landslide identification and deformation analysis in this area are urgently needed. In this context, it was the first time that 164 advanced land-observing satellite-2 (ALOS-2) phased array type L-band synthetic aperture radar-2 (PALSAR-2) images were collected to detect landslide disasters along the entire Linzhi‒Ya’an section. Interferogram stacking and small baseline interferometry methods were used to derive the deformation rate and time-series deformation from 2014‒2020. After that, the hot spot analysis method was introduced to conduct spatial clustering analysis of the annual deformation rate, and the effective deformation area was quickly extracted. Finally, 517 landslide disasters along the Linzhi‒Ya’an route were detected by integrating observed deformation, Google Earth optical images, and external geological data. The main factors controlling the spatial landslide distribution were analyzed. In the vertical direction, the spatial landslide distribution was mainly concentrated in the elevation range of 3000‒5000 m, the slope range of 10‒40°, and the aspect of northeast and east. In the horizontal direction, landslides were concentrated near rivers, and were also closely related to earthquake-prone areas, fault zones, and high-precipitation areas. In short, rainfall, freeze–thaw weathering, seismic activity, and fault zones are the main factors inducing landslides along this route. This research provides scientific support for the construction and operation of the Linzhi‒Ya’an section of the Sichuan‒Tibet Railway.

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Section: Time-series Monitoring For Typical Landslidesmentioning

confidence: 99%

“…The Yigong Zangbo River was markedly blocked and the highway was interrupted for several months. It also resulted in large-scale casualties and property losses upstream and downstream [22,23]. In 2018, a large-scale high-level rock landslide occurred in Baige Village, which caused a break in the Jinsha River for 2 days [24].…”

Section: Study Areamentioning

confidence: 99%

Landslide Detection in the Linzhi–Ya’an Section along the Sichuan–Tibet Railway Based on InSAR and Hot Spot Analysis Methods

et al. 2021

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“…In April 9,2000, the Yigong landslide in Tibet formed a dammed lake with a reservoir capacity of about 50 × 10 8 m 3 , and the breach flood water level reached 55 m high and peak discharge at 12.4 × 10 4 m 3 /s. It washed away the Yigong bridge and roads and caused great damage ranged 500 km downstream (Liu et al 2019;Turzewski et al 2019;Wu et al 2020;Zhuang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The resurrected part is about 0.88 km long and 1.08 km wide and has an area of about 0.925 km 2 . Researchers have studied the potential sliding material distribution of the Woda landslide and estimated the volume of the landslide is about 2.9×10 7 m 3WU et al 2021). …”

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confidence: 99%

Assessment Risk of Evolution Process of Disaster Chain Induced by Potential Landslide in Woda

Yao

Lei

Liu

et al. 2023

Preprint

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The Jinsha River basin in the upper reaches of the Yangtze River in China has strong geological activities, and there are many large-scale landslides around the two banks, which can easily lead to a flood hazard chain. The recent Wenchuan and Luding earthquakes have increased the probability of landslide collapse on the slopes of the Jinsha River and increased the risk of a large landslide-dam-break-flood hazard chain. The Woda landslide is ancient and in a slow deformation stage, and if the landslide revives, it may block rivers and cause outburst floods. This study simulated the dynamic process of large-scale landslide failure and landslide dam formation by the deep integration continuum method. The outburst flood due to the dam breach is calculated by combining the dammed lake flow model and the shallow water equation, which can simulate the evolution of the downstream flood process. The results show that after the Woda landslide blocks the river, a dam of about 68.1m can be formed, the water storage capacity of the dammed lake is about 7.10*108 m3, the peak flow of the burst can reach 4.4*104 m3/s, and the impact range after the burst can reach 140km. Downstream, submerged several downstream villages and towns and the Sichuan-Tibet Railway. The study found that the resistance coefficient of landslides can significantly affect the evolution process of the entire hazard chain. Reducing the resistance coefficient of landslides can largely increase the height of the landslide dam, amplifying the peak flow of the outburst flood and increasing the risk of downstream elements at risk at far.

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“…Similar high-level glacier/snow geological disasters have frequently occurred; these disasters were affected by seismic activity, rainfall, and climate warming in Tibet, thereby causing serious casualties and infrastructure damage (Shang et al 2003;Yin and Xing, 2012;Cui and Jia, 2015). For example, a massive landslide occurred in Zamunong Gully of Yigong, Tibet; it was the largest landslide and river blockage event in China in the past 100 years and has attracted widespread attention from many scholars (Yin, 2011;Yin and Xing, 2012;Delaney and Evans, 2015;Wu et al 2020). The source area was located on a slope with an elevation of ~5000 m asl with deposits of approximately 280 ~300 million m 3 that accumulated at the mouth of the gully, blocked the Yigong Zangbo River, and produced a dammed lake.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of two complex rock and glacier avalanches and RAMMS simulation of a long-runout disaster in the Sedongpu Basin of the Yarlung Zangbo River downstream in October 2018, Tibet, China

Zhang

Yin

Gao

et al. 2022

Preprint

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On October 17 and 29, 2018, two rock and glacier avalanches occurred on the western slope of the Sedongpu Basin upstream of the Yarlung Zangbo River in the Tibetan Plateau, forming the disaster chains and causing damage to many bridges and roads. Based on the comparative analysis of multiple pre-and post-remote sensing images, the initial sliding body, which was composed of rock and glacial material, was located on a steep slope above an elevation of 6000 m. Under the coupling effect of multiple factors such as gravity, rainfall, and weather changes, the initial sliding body detached from the source zone and then transformed into a debris flow after impact and fragmentation. The debris flow traveled downstream and scraped loose glacial till in its path, causing the volume of the sliding body to increase. In addition, the debris flow traveled 10 km under low frictional resistance, as a result of the lubrication via early rainfall and glacial meltwater. Eventually, the debris flow rushed out onto the valley floor, forming a landslide dam and blocking the Yarlung Zangbo River. The deposit volumes on October 17 and 29 were 20.4 million m3 and 10.1 million m3, respectively, with a total mean thickness of ~22m. This study provides an insight into the dynamic process as they unfolded, through multitemporal satellite imagery and numerical simulation. Furthermore, we also discuss the potential cause of rock/ice avalanche and disaster scenarios, as well as the tendency of the rock and glacier avalanches are discussed.

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Morpho-sedimentary and stratigraphic characteristics of the 2000 Yigong River landslide dam outburst flood deposits, eastern Tibetan Plateau

Cited by 19 publications

References 73 publications

Landslide Detection in the Linzhi–Ya’an Section along the Sichuan–Tibet Railway Based on InSAR and Hot Spot Analysis Methods

Landslide Detection in the Linzhi–Ya’an Section along the Sichuan–Tibet Railway Based on InSAR and Hot Spot Analysis Methods

Assessment Risk of Evolution Process of Disaster Chain Induced by Potential Landslide in Woda

Characteristics of two complex rock and glacier avalanches and RAMMS simulation of a long-runout disaster in the Sedongpu Basin of the Yarlung Zangbo River downstream in October 2018, Tibet, China

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