Landslide-tsunami prediction in narrow reservoirs involving reflection

Liu, Jizhixian; Wang, Yang; Yin, Kunlong; Wu, Lixing; Zhang, Longfei

doi:10.1007/s11069-022-05649-5

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…Experimental set‐up and measurement system (adapted from Liu et al, 2022): (a) side view of section b‐b' of (c), (b) picture of a slide (0.30 × 0.20 × 0.10 m), (c) plan view of the basin and measurement system including 34 capacitance wave gauges (CWGs) (green circles), 11 run‐up gauges (RGs) installed on the banks (red lines and circles) and five cameras a–e (grey rectangles), (d) side view of the centerline of the basin, (e) side view of section a‐a' of (c) and the schematic view of the landslide generator (the installation position of CWG39 and 40 varied with α and h and the CWG positions with l 1 = h /2tan α and 2 l 2 = 0.75 m) and (f) picture of the experimental set‐up…”

Section: Physical Modelmentioning

confidence: 99%

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

et al. 2023

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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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Section: Physical Modelmentioning

confidence: 99%

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

et al. 2023

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

Chen,

Xu,

Zhang

et al. 2024

Landslides

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Reservoir impoundment and water level fluctuations often trigger landslides and their secondary disasters, such as potential impulse waves, posing a serious threat to the safety of people along the reservoir and dam areas, causing economic losses and even catastrophic consequences. This study delves into a comprehensive field investigation and monitoring of the engineering geological conditions and deformation mechanisms the Mogu rock landslide. Impoundment is identified as the primary factor inducing slope deformation, with the cumulative displacement of the sliding body showing no signs of convergence, indicating potential instability. By coupling the elasto-visco-plasticity model and the RNG turbulence model in FLOW3D, an actual surge disaster near the Lianghekou Reservoir dam area is replicated to validate the reliability of the numerical method. Building upon this, a three-dimensional model is established to calculate potential impulse waves generated by the Mogu rock landslide, and the risk to 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 study explores the contributions of water level fluctuations to the primary wave height, the maximum run-up on the opposite bank and the dam, and the attenuation rate of wave height along the river channel. The results provide significant reference values for the early warning and prevention of comparable reservoir landslides and potential landslide-induced waves worldwide.

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A critical review about generic subaerial landslide-tsunami experiments and options for a needed step change

Heller

Ruffini

2023

Earth-Science Reviews

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Landslide-tsunami prediction in narrow reservoirs involving reflection

Cited by 5 publications

References 42 publications

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

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

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

A critical review about generic subaerial landslide-tsunami experiments and options for a needed step change

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