Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 3.102
IF3.102
IF 5-year value: 3.284
IF 5-year
3.284
CiteScore value: 5.1
CiteScore
5.1
SNIP value: 1.37
SNIP1.37
IPP value: 3.21
IPP3.21
SJR value: 1.005
SJR1.005
Scimago H <br class='widget-line-break'>index value: 90
Scimago H
index
90
h5-index value: 42
h5-index42
Preprints
https://doi.org/10.5194/nhess-2020-126
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/nhess-2020-126
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  02 Jun 2020

02 Jun 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.

Model development for simulating mudslide and the case study of the failure of the gypsum tailings dam in East Texas in 1966

Tso-Ren Wu1, Thi-Hong-Nhi Vuong1, Chun-Yu Wang2, Chia-Ren Chu2, and Chun-Wei Lin1 Tso-Ren Wu et al.
  • 1Graduate Institute of Hydrological and Oceanic Sciences, National Central University, Taiwan
  • 2Department of Civil Engineering, National Central University, Taiwan

Abstract. Mudslides, avalanches, and mine dam-breaks can be serious disasters and cause severe damages but the detailed flow field description has not been completed yet. This paper developed a modified Bi-viscosity model (MBM) to solve the mudslide flow by adopting Bingham model (BM) and the conventional Bi-viscosity model (CBM). In both CBM and MBM, a yield strain rate is used to identify the plug and liquefied rheological prosperities. In the MBM, an extremely high plug viscosity adopted to represent the stratification effect. BM, CBM, and MBM are integrated into the Splash3D model, which solves Navier-Stokes equations with PLIC-VOF surface-tracking algorithm. The viscosity term is solved by implicit iteration. The model is carefully validated with theoretical results and laboratory data with good agreements. The Splash3D model is then used to study the failure of the gypsum tailings dam in East Texas in 1966, briefed as FGT66. A series of sensitivity analyses on the yield strain rate and grid resolution is performed. The results show that the predicted flood distance and flood speed by MBM is very close to the field data. The MBM results illustrate the process that the plug zone and liquefied zone is developed. The simulations show the initiation of the mudslide flow, the development of the slip surface, the flooding process, and the velocity ceasing process. The slip surface is developed automatically without empirical equations. By comparing the results of BM, CBM, and MBM to the field data, we conclude that the liquefied tailings are under the effect of stratification, and the stratification effect is presented in the extremely high plug viscosity in the Splash3D model.

Tso-Ren Wu et al.

Interactive discussion

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

Interactive discussion

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

Tso-Ren Wu et al.

Tso-Ren Wu et al.

Viewed

Total article views: 189 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
136 44 9 189 12 13
  • HTML: 136
  • PDF: 44
  • XML: 9
  • Total: 189
  • BibTeX: 12
  • EndNote: 13
Views and downloads (calculated since 02 Jun 2020)
Cumulative views and downloads (calculated since 02 Jun 2020)

Viewed (geographical distribution)

Total article views: 171 (including HTML, PDF, and XML) Thereof 168 with geography defined and 3 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 23 Oct 2020
Publications Copernicus
Download
Short summary
Many studies concentrate on mudflow; however, the stratification between the solid and liquid phase inside the mud material has been not considered. This study provides a modified Bi-viscosity model (MBM) to describe the mudslide flow with the stratification effect. The MBM can simulate the initiation of the mudslide, then the development of the slip surface, the flooding process, the velocity ceasing process, and the stoppage of mudflow.
Many studies concentrate on mudflow; however, the stratification between the solid and liquid...
Citation
Altmetrics