Coupled model constructed to simulate the landslide dam flood discharge: a case study of Baige landslide dam, Jinsha River

Wang, Hongjie; Zhou, Yi; Wang, Shixin; Wang, Futao

doi:10.1007/s11707-019-0805-5

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…In this whole process, the flow discharge is clearly a prominent parameter. Thus, there are numerous models and formulas for predicting discharge variation and peak discharge [41][42][43][44]. Existing emergency measures are also used to immediately return the main channel streamflow to normal parameters [36,40,45].…”

Section: Discussionmentioning

confidence: 99%

Theoretical Description of the Hydrodynamic Process after Barrier Lake Formation and Emergency Responses Implementation

Wang

Tan

Shu

et al. 2021

Water

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Barrier lakes are secondary disasters with associated landslides and debris flow that can cause serious damage to the downstream populations and areas. Existing studies are lacking in comprehensive descriptions of the rescue process, where the main channel streamflow varies and topographic erosion develops, as well as engineering disposal performs. This paper aimed to theoretically investigate the formation and emergency responses to barrier lakes using on-the-spot investigation and calculus theory. The results showed that the formation of a barrier lake led to a sudden variation in the flow-change rate (normal to infinite). However, after implementing emergency measures, this rate returned to normal. The whole rescue process could be regarded as the accumulation of disposal effects. Volume changes in the main streams were expressed by a differential equation of the lake surface area and water level variations. In addition, a corresponding theoretical description of flow discharges was also given when engineering measures such as the excavation of diversion channels and engineering blasting were adopted. Specifically, the theoretical expressions of flow discharge were given respectively in the developing stage and breach stable stage after the excavation of diversion channels. The flow discharge through certain sections was also described theoretically when engineering blasting was chosen to widen and deepen the cross-section of the diversion channels. Overall, this paper mathematicizes and theorizes the existing emergency measures, which helps to better understand their implementation principles and application requirements.

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Section: Discussionmentioning

confidence: 99%

Theoretical Description of the Hydrodynamic Process after Barrier Lake Formation and Emergency Responses Implementation

Wang

Tan

Shu

et al. 2021

Water

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“…On October 10 th and November 3 rd 2018 two successive landslides occurred at Baige Village, Jiangda County, Tibetan Autonomous Region, P.R. China (Wu et al 2019;Yang et al 2019;Wang et al 2020;Ding et al 2021;An et al 2021;Zhang et al 2020). They delivered about 18.7x10 6 m 3 and 6.3x10 6 m 3 of sediment, blocking the Jinsha River and forming landslidedammed lakes Ouyang et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Primary and potential secondary risks of landslide outburst floods

Gao

Lee

Deng

et al. 2022

Preprint

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Outburst floods triggered by breaching of landslide dams may cause severe loss of life and property downstream. Accurate identification and assessment of such floods, especially when they leading to secondary impacts, is critical. In 2018, the Baige landslide in the Tibetan Plateau twice blocked the Jinsha River, eventually resulting in a severe outburst flood. The Baige landslide remains active and it is possible that a breach happens again. Based on numerical simulation using a hydrodynamic model, remote sensing, and field investigation, we reproduce the outburst flood process and assess the hazard associated with future floods. The results show that the hydrodynamic model could accurately simulate the outburst flood process, with overall accuracy and kappa accuracy for the flood extent of 0.956 and 0.911. Three future dam break scenarios were considered with landslide dams of heights 30m, 35m, and 51m. The potential storage capacity / back-flow reaches 142x106m3/32km, 182x106m3/40km, and 331x106m3/50km in the valley upstream. Failure of these three dams leads to maximum inundation in the downstream of study reach of 1.674 km2, 1.833 km2, and 1.927 km2. These results demonstrate the serious secondary hazard associated with this region.

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“…On November 3, another landslide occurred at the same location, resulting in a larger-scale dammed lake. Based on the site conditions, artificial diversion was adopted and the breach began on November 12, with a peak discharge of 31000 m 3 /s (Wang et al, 2020;Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Large-Scale Field Test Study on Failure Mechanism of Non-Cohesive Landslide Dam by Overtopping

Yang

Zhou

et al. 2021

Front. Earth Sci.

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In recent years, landslide lake disasters occur frequently in southwest mountainous areas of China. Considering the influence of dam size and discharge channel location, three large-scale field tests were carried out in a natural river to study the failure process and mechanism of non-cohesive soil landslide dam, and the process and mechanism of non-cohesive landslide dam breach were analyzed. The results show that the dam size and discharge channel location have a significant influence on the breach mechanism of the landslide dam. The dam failure process can be divided into three stages: the initiation stage, the development stage and the failure stage. When the discharge channel is located close to the bank, the width of the breach is smaller, and the volume of the residual dam body is larger. The more stable the dam body is, the longer the breach process time is, and the smaller the peak discharge is. This study can provide a scientific reference for the emergency disposal and risk assessment of landslide dam.

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Coupled model constructed to simulate the landslide dam flood discharge: a case study of Baige landslide dam, Jinsha River

Cited by 8 publications

References 45 publications

Theoretical Description of the Hydrodynamic Process after Barrier Lake Formation and Emergency Responses Implementation

Theoretical Description of the Hydrodynamic Process after Barrier Lake Formation and Emergency Responses Implementation

Primary and potential secondary risks of landslide outburst floods

Large-Scale Field Test Study on Failure Mechanism of Non-Cohesive Landslide Dam by Overtopping

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