Comparison between the first and second wave crest amplitude generated by landslides

Yang, Wang; Liu, Jizhixian; Yin, Kunlong; Yu, Le; Zhou, Hao; Huo, Zhitao

doi:10.1016/j.oceaneng.2018.10.040

Cited by 13 publications

(6 citation statements)

References 18 publications

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“…This pattern is a typical characteristic of the head wave height in the near-field area of a partially submerged landslide (Xue et al 2019, Wang et al 2019. Subsequent to the first wave, the impulse waves rapidly attenuate in height, and the energy is continuously dissipated, fluctuating around 10 m. At water level of 2865 m, the maximum head wave height is 12.28 m, and the run-up wave height on the opposite bank is 18.05 m. The impulse wave pattern is comparable to that observed at 2785 m.…”

Section: Waves Generation Processmentioning

confidence: 93%

Numerical simulation of potential impulse waves generated by Mogu toppling rock slope at varying water levels in Lianghekou Reservoir, China

Chen,

Xu,

Zhang

et al. 2023

Preprint

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Reservoir impoundment and water level fluctuation often trigger slope instability and its secondary disasters, such as potential impulse waves, posing a serious threat to the safety of people along the reservoir and the dam area, causing economic losses and even catastrophic consequences. This study delves into a thorough field investigation and monitoring of engineering geological conditions and deformation mechanisms the Mogu toppling rock slope. Impoundment is the primary factor inducing slope deformation, and the cumulative displacement of sliding body has not converged, signifying potential instability. Coupling the elasto-visco-plasticity model and the RNG turbulence model in FLOW3D, an actual surge disaster near Lianghekou Reservoir dam area is reenacted to validate reliability of the numerical method. On this basis, a three-dimensional model is established to calculate potential impulse waves generated by Mogu toppling rock slope, and the risk of the dam is evaluated. Under varying water level conditions, the simulated heights of impulse waves do not surpass the dam elevation, demonstrating a satisfactory safety margin. Given the inherent danger of landslide-induced wave disasters, continuous attention is warranted, and preventive measures and suggestions are proposed to address these concerns. Additionally, the contributions of water level fluctuations to the head wave height, the run-up wave height on the opposite bank and the dam, and the attenuation rate of wave height along the river channel are explored. The results in this study present significant reference values for the early warning and prevention of comparable reservoir landslides and potential landslide-induced waves worldwide.

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Section: Waves Generation Processmentioning

confidence: 93%

Numerical simulation of potential impulse waves generated by Mogu toppling rock slope at varying water levels in Lianghekou Reservoir, China

Chen,

Xu,

Zhang

et al. 2023

Preprint

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“…The wave properties of SLTs depend on the kinematic and geometric parameters of the initial landslides, such as the landslide front impacted velocity v, landslide thickness s, landslide width b, landslide length l and landslide impact angles which is the same as the hill slope angle α, varying from 15 to 40 in this study (Ataie-Ashtiani & Najafi-Jilani, 2008;Cui & Zhu, 2011;Fritz et al, 2004;Heller, 2008;Heller & Hager, 2010;Huang et al, 2014;Mohammed & Fritz, 2012;Panizzo et al, 2005;Walder et al, 2003;Wang et al, 2017Wang et al, , 2019. All 84 tests included five kinds of block landslides, four values of h and five values of α (the experimental parameters for all tests are shown in Table 1).…”

Section: Dimensionless Parametersmentioning

confidence: 98%

Experimental investigation on near‐field edge wave run‐ups generated by landslides in narrow reservoirs

et al. 2023

Self Cite

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Edge waves generated by subaerial landslide‐tsunamis (SLTs) often have potentially huge amplitudes that can endanger human lives, offshore structures, coastal cities and port facilities around reservoirs. Maximum edge wave run‐up (RuM) is the most important parameter for SLT hazard mitigation in an engineering context. This study aimed to investigate the effects of the hill slope angle α on RuM, the first edge wave run‐up Ru1 and the first edge wave decay in the near field Ru1(r/h) through 84 laboratory experiments, which were conducted in a three‐dimensional river channel with α values varying from 15° to 40°. For smaller α values, we found that RuM increased with the increase in α while for large α values exceeding 30°, RuM decreased with the increase in α. An empirical equation considering the effect of α was proposed for the prediction of RuM in the near field, which was well verified by a real case. Additionally, the first edge wave run‐up decay along the shore is also discussed in this paper. This work could have some favourable implications for the preliminary hazard assessment of SLTs.

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“…Due to the effect of the difference in pressure between the inside and outside of the cavity, the surrounding water quickly converged into the cavity and collided, and then gradually formed the second crest with a larger height than the first crest. Wang et al (2019) pointed out that the amplitudes of these first two crests are generally different and the second crest has the highest amplitude when the slide volume is small or the slide Froude number is large. The second crest was formed at t* = 5.742 and propagated towards the direction of the sea-wall.…”

Section: Hydrodynamic Phenomenamentioning

confidence: 99%

“…Ataie-Ashtiani and performed 120 physical model tests to investigate wave characteristics of submarine landslide-induced tsunamis, and relative prediction methods of near-field characteristics were proposed in their later research works (Najafi-Jilani and Ataie-Ashtiani, 2008). Wang et al (2019) used 49 physical model tests to design an orthogonal experiment to compare the amplitude of the first and second wave crests induced by a landslide. The aforementioned experiments do not incorporate detailed fluid-field distribution information.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the hydrodynamic response of an impermeable sea-wall subjected to artificial submarine landslide-induced tsunamis

Deng

Cao

et al. 2021

Landslides

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Landslide-induced tsunamis are common natural hazards that potentially affect the safety and stability of waterfront structures. A numerical tank was constructed using FLOW-3D to investigate the hydrodynamic response of the sea-wall subjected to artificial submarine landslide-induced tsunamis, including the hydrodynamic load and wave run-up height. Initially, the landslideinduced tsunami model was calibrated using experiments to ensure high accuracy for capturing the free surface and obtaining the flow field information. Then, the sea-wall was added into the numerical tank to study the hydrodynamic response of the sea-wall. The results show that the artificial landslide successively generated two wave crests and that the hydrodynamic response of the seawall under the second crest was stronger than that under the first crest. Additionally, the effects of different influencing factors on the hydrodynamic response were discussed, respectively, and prediction equations for the hydrodynamic response considering these factors were proposed.

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Comparison between the first and second wave crest amplitude generated by landslides

Cited by 13 publications

References 18 publications

Numerical simulation of potential impulse waves generated by Mogu toppling rock slope at varying water levels in Lianghekou Reservoir, China

Numerical simulation of potential impulse waves generated by Mogu toppling rock slope at varying water levels in Lianghekou Reservoir, China

Experimental investigation on near‐field edge wave run‐ups generated by landslides in narrow reservoirs

Numerical investigation of the hydrodynamic response of an impermeable sea-wall subjected to artificial submarine landslide-induced tsunamis

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