Article (Scientific journals)
Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)
Glueer, Franziska; Mreyen, Anne-Sophie; Cauchie, Léna et al.
2024In Geosciences, 14 (2), p. 28
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Keywords :
General Earth and Planetary Sciences
Abstract :
[en] While geodetic measurements have long been used to assess landslides, seismic methods are increasingly recognized as valuable tools for providing additional insights into subsurface structures and mechanisms. This work aims to characterize the subsurface structures of the deep-seated gravitational slope deformation (DSGSD) at Heinzenberg through the integration of active and passive seismic measurements. Seismic techniques can hereby deliver additional information on the subsurface structure and mechanisms involved, e.g., the degree of rock mass degradation, the resonant frequencies of the potentially unstable compartments, and the local fracture network orientations that are influenced by wavefield polarization. By employing advanced methods such as H/V analysis, site-to-reference spectral ratios, polarization analysis, surface wave analysis, and the joint multizonal transdimensional Bayesian inversion of velocity structures, we establish a comprehensive baseline model of the landslide at five selected sites. This baseline model shall help identify potential changes after the refilling of Lake Lüsch, which started in 2021. Our results reveal the rupture surface of the DSGSD at various depths ranging from 30 m at the top to over 90 m in the middle of the slope. Additionally, we estimate key parameters including the shear wave velocities of the different rock masses. The 2D geophysical profiles and rock mass properties contribute to the understanding of the subsurface geometry, geomechanical properties, and potential water pathways. This study demonstrates the significance of integrating seismic methods with traditional geodetic measurements and geomorphologic analysis techniques for a comprehensive assessment of landslides, enhancing our ability to monitor and mitigate hazardous events.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Glueer, Franziska ;  Swiss Seismological Service, ETH Zürich, 8092 Zurich, Switzerland
Mreyen, Anne-Sophie  ;  Université de Liège - ULiège > Urban and Environmental Engineering
Cauchie, Léna  ;  Université de Liège - ULiège > CARE "ULiège Library" > ULiège Library : Sciences
Havenith, Hans-Balder  ;  Université de Liège - ULiège > Département de géologie > Géologie de l'environnement
Bergamo, Paolo;  Swiss Seismological Service, ETH Zürich, 8092 Zurich, Switzerland
Halló, Miroslav ;  Swiss Seismological Service, ETH Zürich, 8092 Zurich, Switzerland
Fäh, Donat;  Swiss Seismological Service, ETH Zürich, 8092 Zurich, Switzerland
Language :
English
Title :
Integrating Seismic Methods for Characterizing and Monitoring Landslides: A Case Study of the Heinzenberg Deep-Seated Gravitational Slope Deformation (Switzerland)
Publication date :
24 January 2024
Journal title :
Geosciences
eISSN :
2076-3263
Publisher :
MDPI AG
Volume :
14
Issue :
2
Pages :
28
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
SNSF - Swiss National Science Foundation [CH]
F.R.S.-FNRS - Fund for Scientific Research [BE]
Federal Office for the Environment [CH]
Available on ORBi :
since 01 March 2024

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