Dense 3D displacement vector fields for point cloud-based landslide monitoring

Gojčič, Žan; Schmid, Lorenz

doi:10.1007/s10346-021-01761-y

Cited by 32 publications

(21 citation statements)

References 36 publications

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“…Displacement velocities at the Plateau were 0.6 m yr -1 in October 2011 and reached 3.8 m yr -1 in November 2020 (Fig. 1b) with a sliding dip angle >35 • (see also Gojcic et al 2021). The volume of this second domain is estimated to be on the order of 10 × 10 6 to 25 × 10 6 m 3 .…”

Section: A N D S L I D E G E N E S I S a N D A C T I V I T Ymentioning

confidence: 91%

Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)

Häusler

Gischig

Thöny³

et al. 2021

Geophysical Journal International

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SUMMARY Seismic measurements on unstable rock slopes are a complementary tool to surface displacement surveys to characterize and monitor landslides. A key parameter is seismic amplification, which tends to scale with the degree of rock mass degradation. Amplification also provides a direct measure of how the wavefield is intensified during seismic loading, eventually leading to coseismic failure. Here we present the dynamic response of the fast-moving Brienz/Brinzauls rock slope instability in Switzerland (10 $ \times $ 106 to 25 $ \times $ 106 m3), which threatens settlements and infrastructure in the area. The rockslide shows strong seismic amplification at two resonant frequencies with factors of up to 11 and wavefield polarization influenced by the local fracture network orientation. We monitored the dynamic response over a period of 30 months using ambient vibrations and regional earthquake recordings. We observed a change in wavefield polarization of up to 50°, coinciding with a rotation of the relative surface displacement vector field measured by geodetic systems, highlighting the linkage between wavefield polarization and stress field (i.e. rock mass kinematics). For the analysis of secondary, relative surface displacements, we propose a singular value filtering of the displacement field to remove the principal component of landslide motion. In addition, we found increased seismic amplification values after periods of strong precipitation, providing empirical field evidence that the local precipitation history is a key parameter for assessing the hazard of earthquake-induced slope failure.

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Section: A N D S L I D E G E N E S I S a N D A C T I V I T Ymentioning

confidence: 91%

Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)

Häusler

Gischig

Thöny³

et al. 2021

Geophysical Journal International

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“…Since the data model and method of carrier phase' relative positioning was proposed in 1983, GPS technology has been widely used in various industries, and the RTK virtual reference station technology derived from this technology provides users with the possibility to obtain real-time dynamic high-precision position information [ 4 , 5 ]. GNSS high precision application market at home and abroad is almost completely dominated by GPS, and GPS technology has become one of the most important space geodesy technology means [ 6 ].…”

Section: Literature Reviewmentioning

confidence: 99%

Mining Geological Environment Monitoring and Real-Time Transmission Based on Internet of Things Technology

Wang

Zhang

Pei

et al. 2022

International Journal of Analytical Chemistry

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A landslide monitoring technology based on BeiDouand, a wireless sensor network, is proposed in order to solve the problem that landslide has brought severe threat to people’s life and safety of property. The landslide monitoring system based on the BeiDouand wireless sensor network is analyzed and designed from the point of view of hardware and software. BeiDou message and GPRS double redundancy transmission mode are adopted to improve the reliability of transmission. It also adopts the factor compression method to improve the effectiveness of BeiDoutransmission and adopts queue management and packet scheduling mechanism to improve the real-time and reliability of wireless sensor network transmission. The result is that, as the number of visible satellites increases, the efficiency of the algorithm decreases. However, the overall efficiency of the algorithm has been significantly improved. When there are 28 visible satellites, the number of algorithm times decreases from 20,475 to 1,140, and the efficiency of the algorithm increases by 16.9 times. The GDOP simulated by the fast star selection algorithm proposed in this paper is less than 3.9, reaching an excellent grade.

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“…We used 3D DVF for the analysis of all three slope instabilities. The accuracy of these vector fields was analysed by Gojcic et al (2021), using the Brienz landslide as an example. The comparison with other measurement methods generally reveals small deviations which are not due to measurement or method errors but are caused by the fact that the methods record other movement signals.…”

Section: Three-dimensional Deformation Vector Fields and Angles Of Mo...mentioning

confidence: 99%

“…A recently developed processing method, allowing the calculation of highly resolved direct 3D deformation vectors between multitemporal point clouds (Gojcic et al 2020), has provided new ways for more advanced usage of point clouds. This method has been successfully applied to capture the movement of a landslide (Gojcic et al 2021), and its potential is further exploited in this study.…”

Section: Introductionmentioning

confidence: 99%

The potential of point clouds for the analysis of rock kinematics in large slope instabilities: examples from the Swiss Alps: Brinzauls, Pizzo Cengalo and Spitze Stei

Kenner¹,

Gischig

Gojčič

et al. 2022

Landslides

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Lidar measurements and UAV photogrammetry provide high-resolution point clouds well suited for the investigation of slope deformations. Today, however, the information contained in these point clouds is rarely fully exploited. This study shows three examples of large-scale slope instabilities located in Switzerland, which are actively monitored for reasons of hazard prevention. We used point clouds acquired by terrestrial laser scanning to (1) identify differences in kinematic behaviour of individual rock compartments; (2) highlight active shear planes within the moving rock mass; (3) define the kinematic process driving the slope displacements; (4) model basal sliding planes based on the 3D surface movements of rock slides; (5) calculate exact displacement angles, (6) provide estimates on destabilised rock volumes. This information has significantly contributed to the process understanding and has thus supported decision-making in hazard management.

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Dense 3D displacement vector fields for point cloud-based landslide monitoring

Cited by 32 publications

References 36 publications

Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)

Monitoring the changing seismic site response of a fast-moving rockslide (Brienz/Brinzauls, Switzerland)

Mining Geological Environment Monitoring and Real-Time Transmission Based on Internet of Things Technology

The potential of point clouds for the analysis of rock kinematics in large slope instabilities: examples from the Swiss Alps: Brinzauls, Pizzo Cengalo and Spitze Stei

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