Risk assessment and mitigation for the Hongshiyan landslide dam triggered by the 2014 Ludian earthquake in Yunnan, China

Shi, Zhenming; Xiong, Xiaolei; Peng, Ming; Zhang, Li Min; Xiong, Yi; Chen, Hongxin; Zhu, Yan

doi:10.1007/s10346-016-0699-1

Cited by 56 publications

(30 citation statements)

References 19 publications

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“…These long-term measures are conducive to controlling the reservoir water level and are fundamental approaches to maintain the stability of the landslide dam. The Hongshiyan landslide dam triggered by the Ludian earthquake is a typical example (Shi et al, 2017). An existing drainage tunnel connecting the hydropower plant and reservoir became a diversion channel for the landslide dam.…”

Section: Stability Analysis Of Engineering Mitigation Measures On Lanmentioning

confidence: 99%

Recent Advances in Stability and Failure Mechanisms of Landslide Dams

et al. 2021

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Numerous landslide dams have been induced in recent years as a result of frequent earthquakes and extreme climate hazards. Landslide dams present serious threats to lives and properties downstream due to potentially breaching floods from the impounded lakes. To investigate the factors influencing the stability of landslide dams, a large database has been established based on an in-depth investigation of 1,737 landslide dam cases. The effects of triggers, dam materials, and geomorphic characteristics of landslide dams on dam stability are comprehensively analyzed. Various evaluation indexes of landslide dam stability are assessed based on this database, and stability evaluation can be further improved by considering the dam materials. Stability analyses of aftershocks, surges, and artificial engineering measures on landslide dams are summarized. Overtopping and seepage failures are the most common failure modes of landslide dams. The failure processes and mechanisms of landslide dams caused by overtopping and seepage are reviewed from the perspective of model experiments and numerical analyses. Finally, the research gaps are highlighted, and pathways to achieve a more complete understanding of landslide dam stability are suggested. This comprehensive review of the recent advances in stability and failure mechanisms of landslide dams can serve as a key reference for stability prediction and emergency risk mitigation.

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Section: Stability Analysis Of Engineering Mitigation Measures On Lanmentioning

confidence: 99%

Recent Advances in Stability and Failure Mechanisms of Landslide Dams

et al. 2021

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“…In a broad sense, the InSAR coseismic deformation extends approximately 45 km in the E-W direction and about 40 km in the N-S direction. We can see that the near-field displacements are well mapped, except for the central high-relief mountainous areas, due to the earthquake-associated landslides [26][27][28][29][30][31], building damage [32], strong topographic relief, and/or saturation of the fringe rate. From the InSAR displacement field, the ground surface moved toward the sensor, with an approximate maximum of 10 cm in the southeast, and away from the sensor, with the same maximum of 10 cm in the northwest.…”

Section: Insar Data and Analysismentioning

confidence: 99%

The 2014 Mw 6.1 Ludian Earthquake: The Application of RADARSAT-2 SAR Interferometry and GPS for this Conjugated Ruptured Event

et al. 2019

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Although the Zhaotong–Ludian fault is a seismically active zone located in the boundary between the Sichuan–Yunnan block and the South China block, it has not experienced a large earthquake greater than Mw 7 since at least 1700. On 3 August, 2014, an Mw 6.1 earthquake (the Ludian earthquake) ruptured the Zhaotong active belt in Ludian County, Yunnan province, China. This earthquake was the largest earthquake recorded in the region since 2000, and it provides us with a unique opportunity to study the active tectonics in the region. The analysis of the aftershocks showed that two conjugate faults could have been involved in the event. We first used Global Positioning System (GPS) data and C-band RADARSAT-2 imagery to map the coseismic surface deformation. We then inverted the derived coseismic deformation for the slip distribution based on the constructed conjugate fault model. Finally, the coulomb failure stress due to the Ludian earthquake was estimated to investigate the potential seismic hazards in this region. Our investigations showed that the Ludian earthquake was mainly a bilateral rupture event. The major slip of the main shock was located at depths of 0–5 km, which is close but does not superpose with the aftershocks that are mostly located at depths of 5–20 km. Interestingly, the seismic moment released by the aftershocks (6.9 × 1018 N∙m) was greater than that of the main shock (2.6 × 1018 N∙m). This evidence suggests that the accumulated elastic strain at depths of 0–20 km could have been fully released by the Ludian earthquake and its subsequent aftershocks. Furthermore, our analysis of the coulomb failure stress changes due to the main shock showed that the aftershocks could be the result of dynamic triggering rather than static triggering.

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“…Rockfall hazard assessment can help understand the potential damage from rockfall in a period of time. The hazard assessment attempts to achieve an exhaustive and well-balanced safety level considering both the hazard and rockfall characteristics (Shi et al 2017;Moos et al 2018). Moreover, rockfall hazard assessment of rockfall can help to provide appropriate rockfall countermeasures.…”

Section: Introductionmentioning

confidence: 99%

Quantitative hazard assessment of rockfall and optimization strategy for protection systems of the Huashiya cliff, southwest China

Jiang

Liu

et al. 2020

Geomatics, Natural Hazards and Risk

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Frequent rockfall events at the Huashiya cliff near the dam site of Jinsha Hydropower Station poses great threats to construction projects along the Jinsha River. In order to protect the construction area, a comprehensive analysis of rockfall hazard was carried out including field survey, numerical simulation, quantitative assessment and mitigation strategy. High resolution Digital Terrain Model (DTM) was created by Terrestrial Laser Scanning (TLS), then used for the identification of rockfall sources and simulation of rockfall run-out behaviours. Approximately 60 rockfall simulations were conducted to analyze the interaction between rockfall block and protection nets. Quantitative assessment of rockfall hazard was then made to visualize the distribution and hazard of rockfall. The difference between the 60 rockfall simulations was quantified through Rockfall Interception Ratio (RIR) and the Energy Ratio of Overflying Rockfall (EROR). By integrating RIR, EROR and cost, the performance of protection measures were quantitatively assessed. Then, an optimization strategy was proposed to improve the cost-efficiency of the protection system. At the end of this paper, some problems that can be encountered when creating DTM and hazard maps were discussed, and some advices for designing passive protection system were introduced.

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Risk assessment and mitigation for the Hongshiyan landslide dam triggered by the 2014 Ludian earthquake in Yunnan, China

Cited by 56 publications

References 19 publications

Recent Advances in Stability and Failure Mechanisms of Landslide Dams

Recent Advances in Stability and Failure Mechanisms of Landslide Dams

The 2014 Mw 6.1 Ludian Earthquake: The Application of RADARSAT-2 SAR Interferometry and GPS for this Conjugated Ruptured Event

Quantitative hazard assessment of rockfall and optimization strategy for protection systems of the Huashiya cliff, southwest China

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