Landslide analysis by multi-temporal terrestrial laser scanning (TLS) data: the Mont de la Saxe landslide

Crepaldi, Stefano; Zhao, Ye; Lavy, Muriel; Amanzio, Gianpiero; Suozzi, Enrico; Maio, Marina De

doi:10.3301/rol.2015.72

Cited by 4 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Studies of other alpine rock glaciers have shown that the surface velocity reacts to seasonal temperature changes (Kääb et al, 2007;Ikeda et al, 2008;Delaloye et al, 2010). This response has been attributed to snowmelt (Kääb et al, 2007) and to the channeling of meltwater within the rock glacier, reducing the strength of frozen debris and promoting shearing along horizons (Ikeda et al, 2008;Kenner et al, 2017).…”

Section: Implications For Rock Glacier Understandingmentioning

confidence: 99%

“…While previous works on the surface change of rock glaciers have either measured the surface velocity by tracking objects (Nickus et al, 2015;Bodin et al, 2018) or have calculated changes in the direction of the normal vector with the M3C2 algorithm (Zahs et al, 2019), this study combines the M3C2 algorithm with manual measurements of boulder displacement in the flow direction to separate the two directions of surface change. Seasonal variations in surface change of rock glaciers have been observed (Delaloye et al, 2010;Kenner et al, 2017), but little is known about seasonal changes in the directions of movement. At the Muragl rock glacier in Switzerland, measurements have shown that the surface velocity increases in autumn with a time lag of approximately 3 months after snowmelt and gradually decreases again in winter (Kääb et al, 2007), meaning that surface displacement in the flow direction is dominant in autumn for this rock glacier.…”

Section: Implications For Rock Glacier Understandingmentioning

confidence: 99%

“…They are bodies of unconsolidated debris that move downslope via the creep of supersaturated mountain permafrost cohesive flow, creating special landforms as a visible expression (Barsch, 1992). Their deformation, i.e., change in shape and/or size, has shown sensitivity to atmospheric conditions at interannual (Roer et al, 2008;Sorg et al, 2015;Kellerer-Pirkelbauer et al, 2018) and seasonal (Delaloye et al, 2010;Kenner et al, 2017) timescales. Rising permafrost temperatures, which have been observed since the 1980s, have led to an acceleration of rock glacier movement (Kääb et al, 2007;Sorg et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Measurement of rock glacier surface change over different timescales using terrestrial laser scanning point clouds

et al. 2021

View full text Add to dashboard Cite

Abstract. Topographic change at a given location usually results from multiple processes operating over different timescales. However, interpretations of surface change are often based upon single values of movement, measured over a specified time period or in a single direction. This work presents a method to help separate surface change types that occur at different timescales related to the deformation of an active rock glacier, drawing on terrestrial lidar monitoring at sub-monthly intervals. To this end, we derive 3D topographic changes across the Äußeres Hochebenkar rock glacier in the Ötztal Alps. These changes are presented as the relative contribution of surface change during a 3-week period (2018) to the annual surface change (2017–2018). They are also separated according to the spatially variable direction perpendicular to the local rock glacier surface (using point cloud distance computation) and a single main direction of rock glacier flow, indicated by movement of individual boulders. In a 1500 m2 sample area in the lower tongue section of the rock glacier, the contribution of the 3-week period to the annual change perpendicular to the surface is 20 %, compared with 6 % in the direction of rock glacier flow. Viewing change in this way, our approach provides estimates of surface change in different directions that are dominant at different times of the year. Our results demonstrate the benefit of more frequent lidar monitoring and, critically, the requirement for novel approaches to quantifying and disaggregating surface change, as a step towards rock glacier observation networks focusing on the analysis of 3D surface change over time.

show abstract

Section: Implications For Rock Glacier Understandingmentioning

confidence: 99%

Section: Implications For Rock Glacier Understandingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Measurement of rock glacier surface change over different timescales using terrestrial laser scanning point clouds

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Terrestrial Laser Scanner or Terrestrial Light Detection and Ranging (LiDAR) has also been successfully used for landslide monitoring and for defining the boundaries of active landslides [19][20][21][22][23], being able to identify small deformations by repeating terrestrial laser scanning surveys.…”

Section: Introductionmentioning

confidence: 99%

Multi-Source Data Integration to Investigate a Deep-Seated Landslide Affecting a Bridge

et al. 2019

View full text Add to dashboard Cite

The integration of data from different sources can be very helpful in understanding the mechanism, the geometry, the kinematic, and the area affected by complex instabilities, especially when the available geotechnical information is limited. In this work, the suitability of different techniques for the study of a deep-seated landslide affecting a bridge in Alcoy (Spain) is evaluated. This infrastructure presents such severe damage that has rendered the bridge unusable, which prevents normal access to an important industrial area. Differential SAR Interferometry (DInSAR) and terrestrial Light Detection and Ranging (LiDAR) remote sensing techniques have been combined with ground displacement monitoring techniques, such as inclinometers and conventional geological and geotechnical investigation, electrical-seismic tomography, damage, and topographic surveys, to determine the boundaries, mechanism, and kinematics of the landslide. The successful case study that is illustrated in this work highlights the potential and the need for integrating multi-source data for the optimal management of complex landslides and the effective design of remedial measurements.

show abstract

Coastal Cliffs Monitoring and Prediction of Displacements Using Terrestial Laser Scanning

Tysiąc¹,

Wojtowicz²,

Szulwic

2016

2016 Baltic Geodetic Congress (BGC Geomatics)

View full text Add to dashboard Cite

Landslide analysis by multi-temporal terrestrial laser scanning (TLS) data: the Mont de la Saxe landslide

Cited by 4 publications

References 0 publications

Measurement of rock glacier surface change over different timescales using terrestrial laser scanning point clouds

Measurement of rock glacier surface change over different timescales using terrestrial laser scanning point clouds

Multi-Source Data Integration to Investigate a Deep-Seated Landslide Affecting a Bridge

Coastal Cliffs Monitoring and Prediction of Displacements Using Terrestial Laser Scanning

Contact Info

Product

Resources

About