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Application of petrophysical relationships to electrical resistivity models for assessing the stability of a landslide in British Columbia, Canada

Lookup NU author(s): Dr Jessica HolmesORCiD

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Landslides in the Thompson River Valley, British Columbia, Canada, threaten the serviceability of two railway lines that connect Vancouver to the rest of Canada and the US. To minimise the impact of slope instability on vital transport infrastructure, as well as on terrestrial and aquatic ecosystems, public safety, communities, local heritage, and the economy, and to better inform decision making, there is a need for monitoring. Since 2013, the Ripley Landslide – a small, slow-moving, translational landslide – has been the focus of monitoring efforts in the Thompson River Valley transportation corridor. In November 2017, a novel Electrical Resistivity Tomography (ERT) monitoring system was installed on the site, providing near-real-time data collection via a telemetric link. 4-Dimensional resistivity models are presented in the context of moisture content and soil suction, two parameters known to influence slope stability in the Thompson River Valley. Here, we discuss the development of laboratory-based petrophysical relationships that relate electrical resistivity to moisture content and soil suction directly, building on relationships developed in the field. The 4-D ERT models were calibrated using these petrophysical relationships to provide insights into the complex spatial and temporal variations in moisture content and soil suction. This study highlights the utility of geoelectrical monitoring for assessing slope stability in the context of moisture-driven landslides.


Publication metadata

Author(s): Holmes J, Chambers J, Wilkinson P, Meldrum P, Cimpoiasu M, Boyd J, Huntley D, Williamson P, Gunn D, Dashwood B, Whiteley J, Watlet A, Kirkham M, Sattler K, Elwood D, Sivakumar V, Donohue S

Publication type: Article

Publication status: Published

Journal: Engineering Geology

Year: 2022

Volume: 301

Print publication date: 01/05/2022

Online publication date: 11/03/2022

Acceptance date: 08/03/2022

Date deposited: 24/05/2022

ISSN (electronic): 0013-7952

Publisher: Elsevier

URL: https://doi.org/10.1016/j.enggeo.2022.106613

DOI: 10.1016/j.enggeo.2022.106613


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Funding

Funder referenceFunder name
EP/R034575/1EPSRC

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