Articles | Volume 17, issue 9
Nat. Hazards Earth Syst. Sci., 17, 1611–1621, 2017
https://doi.org/10.5194/nhess-17-1611-2017
Nat. Hazards Earth Syst. Sci., 17, 1611–1621, 2017
https://doi.org/10.5194/nhess-17-1611-2017

Research article 22 Sep 2017

Research article | 22 Sep 2017

Hazard assessment comparison of Tazhiping landslide before and after treatment using the finite-volume method

Dong Huang, Yuan Jun Jiang, Jian Ping Qiao, and Meng Wang Dong Huang et al.
  • Key Laboratory of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Science, Chengdu 610041, China

Abstract. Through investigation and analysis of geological conditions and mechanical parameters of the Tazihping landslide, finite-volume method coupling with Voellmy model is used to simulate the landslide mass movement process. The present paper adopts the numerical approach of the RAMMS software program and the GIS platform to simulate the mass movement process before and after engineering treatment. This paper also provides the conditions and characteristic variables of flow-type landslide in terms of flow height, velocity, and stresses. The 3-D division of hazard zones before and after engineering treatment was also mapped. The results indicate that the scope of hazard zones decreased after engineering treatment of the landslide. Compared with the case of before engineering treatment, the extent of high-hazard zones was reduced by about two-thirds, and the characteristic variables of the mass movement in the case of after treatment decreased to one-third of those in the case of before treatment. Despite having engineering treatment, the Tazhiping landslide still poses significant potential threat to the nearby residences. Therefore, it suggests that the houses located in high-hazard zones should be relocated or reinforced for protection.

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