Hazard Estimation of Deep Seated Mass Movements: Project Part Microseismic Monitoring

Project Management: Prof. Dr. Ewald BRÜCKL, Institute of Geodesy and Geophysics, Vienna University of Technology
Duration: 4 years (beginning 2004)

Contact:
Prof. Dr. Ewald Brückl
Institute of Geodesy and Geophysics
Vienna University of Technology
Gusshausstraße 27-29, 1040 Vienna
T +43 1 58801-12820
F +43 1 58801-12892
ebrueckl@luna.tuwien.ac.at

Hazard Estimation of Deep Seated Mass Movements: Project Part Monitoring of Deformations

Project Management: Prof. Dr. Fritz K. BRUNNER, Institute of Engineering Geodesy and Measurement Systems, Graz University of Technology
Duration: 4 years (beginning 2004)

Contact:
Prof. Dr. Fritz K. Brunner
Institute of Engineering Geodesy and Measurement Systems
Graz University of Technology
Steyrergasse 30, 8010 Graz
T +43 316 8736321
F +43 316 8736820
fritz.brunner@tugraz.at

Abstracts (ISDR-20 and-21)

The projects ISDR-20 and ISDR-21 are a joint effort by researchers of the Vienna and the Graz Universities of Technology to investigate the risk assessment of deep-seated landslides. The research goal is the combination of seismic (TU Vienna) and geodetic (TU Graz) monitoring methods in an integrated monitoring system, IMoS. The combination of both methods should allow the determination of the complete spectrum of the motions ranging from quasi-continuous motions over stick-slip to critical fracturing. The goal encompasses also the development of the processing and analysis methods. An important issue is the fusion of the separately measured data from GPS and seismometer into one output signal which represents the frequency range from seismic waves (~0.01 seconds) over short oscillations (minutes to hours) to long-term trends (several years). In addition, a strain meter is being developed to measure the local deformation field around each monitoring station. Its data can be used to assess the representativeness of the measurement station and to yield information about possible strain changes.

The development of the IMoS is based on the experience gained from the projects IDNDR-10, IDNDR-12, ISDR-18 and ISDR-19, and here especially the results of the geodetic and seismic monitoring. The risk assessment uses the methods of structural exploration, kinematic reconstruction and modelling, and determination of the most significant influence parameters. These methods were developed in the previous projects. Initially, IMoS is being tested at and developed for the comprehensively studied Gradenbach landslide. Subsequently it is planned to investigate rather different types of deep-seated landslides which possibly are in different phases of development. The fusion of GPS, seismometer and strain meter data, measured by the IMoS stations, yields data of a completely new quality. The modelling and analysis of these data ought to lead to new understanding in the risk assessment of landslides.

Integrated geophysical studies of Alpine inhomogeneous mass movements - Site Gschliefgraben

Project Management: Prof. Dr. Karl MILLAHN, Department of Applied Geological Sciences and Geophysics, University of Leoben
Duration: 3 years (beginning 2004)

Contact:
Prof. Dr. Karl Millahn
Department of Applied Geological Sciences and Geophysics
University of Leoben
Peter Tunner-Strasse 27, 8700 Leoben
karl.millahn@notes.unileoben.ac.at