Preprints
https://doi.org/10.5194/nhess-2020-289
https://doi.org/10.5194/nhess-2020-289

  27 Oct 2020

27 Oct 2020

Review status: this discussion paper is a preprint. It has been under review for the journal Natural Hazards and Earth System Sciences (NHESS). The manuscript was not accepted for further review after discussion.

Numerical investigation on the kinetic characteristics of the Yigong landslide in Tibet, China

Zili Dai1, Fawu Wang2, Hufeng Yang3, and Shiwei Qin1 Zili Dai et al.
  • 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.

Zili Dai et al.

 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Zili Dai et al.

Zili Dai et al.

Viewed

Total article views: 262 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
197 61 4 262 6 7
  • HTML: 197
  • PDF: 61
  • XML: 4
  • Total: 262
  • BibTeX: 6
  • EndNote: 7
Views and downloads (calculated since 27 Oct 2020)
Cumulative views and downloads (calculated since 27 Oct 2020)

Viewed (geographical distribution)

Total article views: 205 (including HTML, PDF, and XML) Thereof 200 with geography defined and 5 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 07 Mar 2021
Download
Altmetrics