堰塞体溃决流量与溃口形态演化数值模拟

梅胜尧; 钟启明; 陈生水; 单熠博

doi:10.3799/dqkx.2022.360

Volume 48 Issue 4

Apr. 2023

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Mei Shengyao, Zhong Qiming, Chen Shengshui, Shan Yibo, 2023. Numerical Simulation of Breach Hydrograph and Morphology Evolution during Landslide Dam Breaching. Earth Science, 48(4): 1634-1648. doi: 10.3799/dqkx.2022.360

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Mei Shengyao, Zhong Qiming, Chen Shengshui, Shan Yibo, 2023. Numerical Simulation of Breach Hydrograph and Morphology Evolution during Landslide Dam Breaching. Earth Science, 48(4): 1634-1648. doi: 10.3799/dqkx.2022.360

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Numerical Simulation of Breach Hydrograph and Morphology Evolution during Landslide Dam Breaching

doi: 10.3799/dqkx.2022.360

Mei Shengyao^{1, 3
,
,},
Zhong Qiming^{1, 2
,
,},
Chen Shengshui^{1, 2},
Shan Yibo^{1, 3}

1.
Department of Geotechnical Engineering, Nanjing Hydraulic Research Institute, Nanjing 210024, China
2.
Key Laboratory of Reservoir and Dam Safety of Ministry of Water Resources, Nanjing 210029, China
3.
College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China

Received Date: 2022-04-04
Publish Date: 2023-04-25

Abstract

Abstract

Landslide dam is a common geological disaster in mountainous area. Once breach, it would pose a serious threat to the lives and property safety of downstream people. In emergency response, it is necessary to rapidly and accurately predict the landslide dam breach hydrograph and morphology evolution. However, most of the state-of-the-art numerical models for landslide dam breaching cannot fully consider the geomorphological characteristics of the landslide dam, as well as the breach process under complicated topography. In this paper, the Reynolds-averaged Navier-Stokes equations combined with the renormalization group k-ε turbulence model were used to analyze the breach flow under the complex topography. Meanwhile, the sediment transport equations for bedload and suspended load were employed to simulate the breach morphology evolution process. The "11·03" Baige landslide dam failure case with detailed survey and hydrological data was selected as the representative for back analysis. The comparison of the calculated and measured results on breach hydrographs, hydrodynamic characteristics during dam breaching, and final breach morphologies show that the numerical simulation results can present good performance on landslide dam breach process, which testified to the rationality of the model.
- landslide dam,
- breach process,
- numerical simulation,
- breach hydrograph,
- breach morphology

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References(45)

References

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Numerical Simulation of Breach Hydrograph and Morphology Evolution during Landslide Dam Breaching

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