Application of multi-dimensional electrical resistivity tomography datasets to investigate a very slow-moving landslide near Ashcroft, British Columbia, Canada

Huntley, David; Bobrowsky, Peter T.; Hendry, Michael T.; Macciotta, Renato; Elwood, David; Sattler, Kelvin; Best, Melvyn E.; Chambers, Jonathan; Meldrum, Philip

doi:10.1007/s10346-019-01147-1

Cited by 46 publications

(18 citation statements)

References 19 publications

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“…When air temperatures are >0 o C, rain and melting snow result in an increase in moisture content of subsurface clay-rich units (Huntley et al 2019b;Holmes et al 2020). That peak displacement is observed through winter to spring, implies that low river and groundwater levels are necessary for significant movement (Fig.…”

Section: Landslide Change Detectionmentioning

confidence: 99%

Field testing innovative differential geospatial and photogrammetric monitoring technologies in mountainous terrain near Ashcroft, British Columbia, Canada

et al. 2021

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This paper presents a novel approach to continuously monitor very slow-moving translational landslides in mountainous terrain using conventional and experimental differential global navigation satellite system (d-GNSS) technologies. A key research question addressed is whether displacement trends captured by a radio-frequency "mobile" d-GNSS network compare with the spatial and temporal patterns in activity indicated by satellite interferometric synthetic aperture radar (InSAR) and unmanned aerial vehicle (UAV) photogrammetry. Field testing undertaken at Ripley Landslide, near Ashcroft in south-central British Columbia, Canada, demonstrates the applicability of new geospatial technologies to monitoring ground control points (GCPs) and railway infrastructure on a landslide with small and slow annual displacements (<10 cm/yr). Each technique records increased landslide activity and ground displacement in late winter and early spring. During this interval, river and groundwater levels are at their lowest levels, while ground saturation rapidly increases in response to the thawing of surficial earth materials, and the infiltration of snowmelt and runoff occurs by way of deep-penetrating tension cracks at the head scarp and across the main slide body. Research over the last decade provides vital information for government agencies, national railway companies, and other stakeholders to understand geohazard risk, predict landslide movement, improve the safety, security, and resilience of Canada's transportation infrastructure; and reduce risks to the economy, environment, natural resources, and public safety.

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Section: Landslide Change Detectionmentioning

confidence: 99%

Field testing innovative differential geospatial and photogrammetric monitoring technologies in mountainous terrain near Ashcroft, British Columbia, Canada

et al. 2021

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“…Monitoring instrumentation at this landslide include grouted-in vibrating wire piezometers, inclinometer casings, Shape Accel Arrays (SAA), Differential GPS systems, and a wave-guide system that uses waves emitted as the landslide deforms and interprets them as relative displacement; among others. Site investigation techniques deployed at the site include borehole logging, geophysical investigations (seismic, electric resistivity), real time electric resistivity to calculate changes in unsaturated water contents, TLS and aerial laser scanning (ALS); among others [44][45][46][47]. Some of the in-place instrumentation at the Ripley Landslide are shown in Figure 9.…”

Section: Instrumentation and Remote Sensing Techniquesmentioning

confidence: 99%

“…2021, 13, x FOR PEER REVIEW 12 of 22 among others. Site investigation techniques deployed at the site include borehole logging, geophysical investigations (seismic, electric resistivity), real time electric resistivity to calculate changes in unsaturated water contents, TLS and aerial laser scanning (ALS); among others [44][45][46][47]. Some of the in-place instrumentation at the Ripley Landslide are shown in Figure 9.…”

Section: Instrumentation and Remote Sensing Techniquesmentioning

confidence: 99%

Remote Sensing Applications for Landslide Monitoring and Investigation in Western Canada

Macciotta

Hendry

2021

Remote Sensing

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Transportation infrastructure in mountainous terrain and through river valleys is exposed to a variety of landslide phenomena. This is particularly the case for highway and railway corridors in Western Canada that connect towns and industries through prairie valleys and the Canadian cordillera. The fluidity of these corridors is important for the economy of the country and the safety of workers, and users of this infrastructure is paramount. Stabilization of all active slopes is financially challenging given the extensive area where landslides are a possibility, and monitoring and minimization of slope failure consequences becomes an attractive risk management strategy. In this regard, remote sensing techniques provide a means for enhancing the monitoring toolbox of the geotechnical engineer. This includes an improved identification of active landslides in large areas, robust complement to in-place instrumentation for enhanced landslide investigation, and an improved definition of landslide extents and deformation mechanisms. This paper builds upon the extensive literature on the application of remote sensing techniques and discusses practical insights gained from a suite of case studies from the authors’ experience in Western Canada. The review of the case studies presents a variety of landslide mechanisms and remote sensing technologies. The aim of the paper is to transfer some of the insights gained through these case studies to the reader.

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“…Over the past decade, DSS has asserted itself as a versatile method by which to recover the deformation of Earth materials (Buchoud et al, 2016; Habel & Krebber, 2011; Schenato, 2017; Shi et al, 2019; Zhang & Xue, 2019). Among the most widely studied are sediment compaction sensing (Murai et al, 2013; Rabaiotti et al, 2015; Zhang et al, 2018) and landslide instability detection (Denchik et al, 2019; Huntley et al, 2019; Iten et al, 2008; Kogure & Okuda, 2018; Moore et al, 2010; Picarelli et al, 2015; Puzrin et al, 2020; Schenato et al, 2017; Wang et al, 2009). For field applications, the sensing elements—FO cables—are very often installed in the ground via a trench (Hauswirth et al, 2012; Lindsey et al, 2017; Linker & Klar, 2017) or a borehole (Lellouch et al, 2019; Murai et al, 2013; Puzrin et al, 2020; Rabaiotti et al, 2015; Zhang et al, 2018), with an optoelectronic instrument (known as the interrogator) being placed on the ground for data acquisition, as sketched in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

Toward Distributed Fiber‐Optic Sensing of Subsurface Deformation: A Theoretical Quantification of Ground‐Borehole‐Cable Interaction

et al. 2020

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Fiber‐optic sensing is emerging as a superior means for distributed strain sensing of the subsurface. The ability of an embedded fiber‐optic cable to capture accurate strain profiles depends on the degree of rigid mechanical coupling between the ground and the cable. However, a current challenge in this field is to determine the actual level of ground deformation from strain signatures sensed by the cable deployed in the subsurface; addressing this issue has been hampered by the lack of suitable theoretical methods. Here we propose a two‐step ground‐cable coupling evaluation procedure, whereby we develop analytical formulations to quantify the interaction and interface shear transfer of a ground‐borehole‐cable system. We constrain key model parameters using a data set acquired with a fiber optics‐instrumented borehole for monitoring groundwater‐related sediment compaction. Extensive parametric analyses reveal that increasing the backfill modulus and cable gauge length or decreasing the borehole radius and cable stiffness can improve the quality of strain transferred to the cable from the ground; the effect of ground properties is comparably insignificant. Further, we develop design charts and tables at designated transfer thresholds to facilitate the development and field deployment of fiber sensing elements. Taken together, the theoretical quantification of ground‐cable coupling should improve the state‐of‐the‐art performance of distributed fiber‐optic strain sensing for subsurface ground movements detection and monitoring.

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Application of multi-dimensional electrical resistivity tomography datasets to investigate a very slow-moving landslide near Ashcroft, British Columbia, Canada

Cited by 46 publications

References 19 publications

Field testing innovative differential geospatial and photogrammetric monitoring technologies in mountainous terrain near Ashcroft, British Columbia, Canada

Field testing innovative differential geospatial and photogrammetric monitoring technologies in mountainous terrain near Ashcroft, British Columbia, Canada

Remote Sensing Applications for Landslide Monitoring and Investigation in Western Canada

Toward Distributed Fiber‐Optic Sensing of Subsurface Deformation: A Theoretical Quantification of Ground‐Borehole‐Cable Interaction

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