Landslides triggered by the 2015 Gorkha Earthquake and analysis of their long-lasting impact

Authors

  • Hikaru Tomita Graduate school of Urban Innovation, Yokohama National University, Yokohama
  • Alessandra Mayumi Nakata Institute of Urban Innovation, Yokohama National University, Yokohama
  • Kazuo Konagai Institute of Urban Innovation, Yokohama National University, Yokohama
  • Takashi Matsushima Division of Engineering Mechanics and Energy, University of Tsukuba, Ibaraki
  • Masataka Shiga Graduate school of Urban Innovation, Yokohama National University, Yokohama
  • Takaaki Ikeda Dept., Civil and environmental Eng., Nagaoka University of Technology, Niigata
  • Rama Mohan Pokhrel Earth Investigation and Solution Nepal Pvt. Ltd., Kathmandu

DOI:

https://doi.org/10.3126/jngs.v55i1.22793

Keywords:

Landslides risk assessment, Gorkha earthquake, Depth-integrated particle method

Abstract

The Gorkha earthquake of April 25, 2015 has caused many landslides along the Trishuli River in the Rasuwa District. A numerical approach has been taken to assess the remaining risk of landslides. The debris mass movements are described in simulations with only three parameters, namely, the critical angle if, Gauckler–Manning roughness coefficient n, and angle of repose id. The optimum set of these three parameters, obtained through a batch of numerical simulations to minimize the prediction error, was then used to identify locations of unstable colluvium deposits remaining along gullies on steep valley walls of the Trishuli River.

 

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Published

2018-06-04

How to Cite

Tomita, H., Nakata, A. M., Konagai, K., Matsushima, T., Shiga, M., Ikeda, T., & Pokhrel, R. M. (2018). Landslides triggered by the 2015 Gorkha Earthquake and analysis of their long-lasting impact. Journal of Nepal Geological Society, 55(1), 77–84. https://doi.org/10.3126/jngs.v55i1.22793

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Articles