Evidence of a hidden landslide slip surface beneath a mountain hamlet

Yu Zhao, Kazuo Konagai

Abstract

Earthquake-triggered landslides are some of the most destructive natural disasters. Although remote detection of landslides is economic and efficient, it may miss the more subtle signs of hidden landslides. The Kizawa Tunnel and facilities in its vicinity were severely damaged in the 2004 mid-Niigata Prefecture earthquake. After investigation of the most prominent cracks, the damage was attributed to the slip along a hidden weakness plane. Evidence supporting this argument is summarized in this paper. However, the extent of the shear plane is not limited to the interior of the northern part of the tunnel. The dislocation observed in the two wells to the south of the Kizawa Tunnel together with other findings from previous studies indicates that Kizawa hamlet lies on the southern extension of the same shear plane. Taking account of the presence of flat sedimentary structures, the shear plane may extend in all directions. The authors also surveyed other signs of damage along the perimeter where the shear plane intersects the ground surface. The geological and geomorphological features of the hidden landslide are discussed. Reactivation of interlayer sliding is a threat to the local residents, and thus more attention should be paid to monitoring the movement of the slope to avoid devastating damages. © 2014 Springer-Verlag Berlin Heidelberg.

Original languageEnglish
Pages (from-to)4615-4624
Number of pages10
JournalEnvironmental Earth Sciences
Volume71
Issue number10
DOIs
StatePublished - 2014 Jan 1
Externally publishedYes

Fingerprint

landslide
tunnel
damage
earthquake
geomorphological feature
geological feature
sedimentary structure
natural disaster
dislocation
reactivation
sliding
crack
well
mountain
monitoring
economics

Keywords

  • Boreholes
  • Hidden landslide
  • Mid-Niigata Prefecture earthquake
  • Tunnel
  • Wells

ASJC Scopus subject areas

  • Soil Science
  • Environmental Chemistry
  • Water Science and Technology
  • Pollution
  • Global and Planetary Change
  • Geology
  • Earth-Surface Processes

Cite this

Evidence of a hidden landslide slip surface beneath a mountain hamlet. / Zhao, Yu; Konagai, Kazuo.

In: Environmental Earth Sciences, Vol. 71, No. 10, 01.01.2014, p. 4615-4624.

Research output: Contribution to journalArticle

Zhao, Yu; Konagai, Kazuo / Evidence of a hidden landslide slip surface beneath a mountain hamlet.

In: Environmental Earth Sciences, Vol. 71, No. 10, 01.01.2014, p. 4615-4624.

Research output: Contribution to journalArticle

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