Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China
- 1Department of Civil Engineering, Shanghai University, Shanghai, 200444, China
- 2Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
- 3Department of Geological Engineering, Southwest Jiaotong University, Chengdu 610031, China
- 1Department of Civil Engineering, Shanghai University, Shanghai, 200444, China
- 2Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
- 3Department of Geological Engineering, Southwest Jiaotong University, Chengdu 610031, China
Abstract. To analyse the kinetic characteristics of a rapid landslide that occurred on 9 April 2000 in Tibet, China, a meshfree numerical method named Smoothed Particle Hydrodynamics (SPH) is introduced, and two-dimensional and three-dimensional models are established in this work. Based on the numerical simulation, the landslide motion process is reproduced and the kinetic characteristics are analysed combined with the field investigation data. In the kinetic analysis, the landslide velocity, run-out distance, landslide accumulation, and energy features are discussed. Simulation results show that the landslide mass undergoes an acceleration stage after failure, then the kinetic energy dissipates gradually due to the friction and collision during the landslide propagation. Finally, the landslide mass blocks the Yigong river and forms a huge landslide dam and an extensive barrier lake. The peak velocity is calculated to be about 100 m/s, and the run-out distance is approximately 8,500 m. The simulation results basically match the data measured in field, thus verifying the good performance of the presented SPH model. This approach can provide a new way to predict hazardous areas and estimate the hazard intensity of rapid landslides.
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Preprint
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Zili Dai et al.
Interactive discussion


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RC1: 'Review', Anonymous Referee #1, 16 Nov 2020
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RC2: 'Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China', Anonymous Referee #2, 24 Nov 2020
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AC2: 'Reply on RC2', Zili Dai, 31 Dec 2020
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AC2: 'Reply on RC2', Zili Dai, 31 Dec 2020
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AC1: 'Reply on RC1', Zili Dai, 31 Dec 2020
-
RC2: 'Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China', Anonymous Referee #2, 24 Nov 2020
Interactive discussion


-
RC1: 'Review', Anonymous Referee #1, 16 Nov 2020
-
RC2: 'Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China', Anonymous Referee #2, 24 Nov 2020
-
AC2: 'Reply on RC2', Zili Dai, 31 Dec 2020
-
AC2: 'Reply on RC2', Zili Dai, 31 Dec 2020
-
AC1: 'Reply on RC1', Zili Dai, 31 Dec 2020
-
RC2: 'Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China', Anonymous Referee #2, 24 Nov 2020
Zili Dai et al.
Zili Dai et al.
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