Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake

Dominique Turmel, Jacques Locat, Gary Parker, Jean Marie Konrad

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Wabush Lake is characterized by a nearly constant sediment input, resulting from the deposition of mine tailings. Five bathymetric surveys were conducted in this lake, in order to understand the sedimentation pattern over more than 12 years. Of the morphologies studied, submarine channel and knickpoints were traced out and documented. A physical model of Wabush Lake was also constructed in order to understand specific morphologies, such as the knickpoints. As part of this study, it was observed that knickpoints migration could be explained, at least in the laboratory, by two mechanisms: landslide and erosion, and not only erosion as previously thought. This previous conclusion will be applied to some knickpoints found in Wabush Lake. Two cases are analysed: (1) a knickpoint where a tension crack is present and (2) another knickpoint that shows no sign of instability. It is found that, when an excess of pore water pressure is present due to rapid sedimentation, static liquefaction may occur at the head of a knickpoint leading to a localized slope failure.

Original languageEnglish (US)
Title of host publicationAdvances in Natural and Technological Hazards Research
PublisherSpringer Netherlands
Pages229-239
Number of pages11
DOIs
StatePublished - Jan 1 2016

Publication series

NameAdvances in Natural and Technological Hazards Research
Volume41
ISSN (Print)1878-9897
ISSN (Electronic)2213-6959

Fingerprint

Landslides
Lakes
erosion
landslide
migration
lake
Sedimentation
evidence
Erosion
sedimentation
submarine channel
bathymetric survey
water
Tailings
slope failure
Liquefaction
liquefaction
tailings
porewater
Sediments

Keywords

  • Delta
  • Knickpoint
  • Landslide
  • Liquefaction
  • Rapid deposition
  • Tailings

ASJC Scopus subject areas

  • Global and Planetary Change
  • Geography, Planning and Development
  • Economic Geology
  • Computers in Earth Sciences
  • Management, Monitoring, Policy and Law

Cite this

Turmel, D., Locat, J., Parker, G., & Konrad, J. M. (2016). Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake. In Advances in Natural and Technological Hazards Research (pp. 229-239). (Advances in Natural and Technological Hazards Research; Vol. 41). Springer Netherlands. https://doi.org/10.1007/978-3-319-20979-1_23

Knickpoint migration induced by landslide : Evidence from laboratory to field observations in Wabush Lake. / Turmel, Dominique; Locat, Jacques; Parker, Gary; Konrad, Jean Marie.

Advances in Natural and Technological Hazards Research. Springer Netherlands, 2016. p. 229-239 (Advances in Natural and Technological Hazards Research; Vol. 41).

Research output: Chapter in Book/Report/Conference proceedingChapter

Turmel, D, Locat, J, Parker, G & Konrad, JM 2016, Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake. in Advances in Natural and Technological Hazards Research. Advances in Natural and Technological Hazards Research, vol. 41, Springer Netherlands, pp. 229-239. https://doi.org/10.1007/978-3-319-20979-1_23
Turmel D, Locat J, Parker G, Konrad JM. Knickpoint migration induced by landslide: Evidence from laboratory to field observations in Wabush Lake. In Advances in Natural and Technological Hazards Research. Springer Netherlands. 2016. p. 229-239. (Advances in Natural and Technological Hazards Research). https://doi.org/10.1007/978-3-319-20979-1_23
Turmel, Dominique ; Locat, Jacques ; Parker, Gary ; Konrad, Jean Marie. / Knickpoint migration induced by landslide : Evidence from laboratory to field observations in Wabush Lake. Advances in Natural and Technological Hazards Research. Springer Netherlands, 2016. pp. 229-239 (Advances in Natural and Technological Hazards Research).
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