A Complex Geoscientiffic Strategy for Landslide Hazard Mitigation – Case Study Sibratsgfäll

Supper, R.; Römer, A.; Bieber, G.; Jaritz, Wolfgang

doi:10.3997/2214-4609-pdb.13.b011

Cited by 1 publication

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“…The Geomon 4D automatic geoelectrical monitoring system was originally developed by the Geological Survey of Austria (Supper et al 2003(Supper et al , 2004(Supper et al , 2005 for an optimized monitoring of (2) a...electrode separation, R meas ...measured resistance, U meas ...measured potential difference, I inj ...injected current. An empirical formula for the penetration depth of measurements using Wenner configuration is given as a/2 (Edwards 1976).…”

Section: Hardware Adaptations Of the Geomon 4d Geoelectrical System Tmentioning

confidence: 99%

“…The Geomon 4D automatic geoelectrical monitoring system was originally developed by the Geological Survey of Austria (Supper et al . , , ) for an optimized monitoring of landslides (Supper ). Due to the application of innovative electronic components, data acquisition time was reduced, thus allowing the generation of snapshots of the subsurface structure.…”

Section: Development Of An Improved Measuring Technology For Permafromentioning

confidence: 99%

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Geoelectrical monitoring of frozen ground and permafrost in alpine areas: field studies and considerations towards an improved measuring technology

Supper

Ottowitz

Jochum

et al. 2013

Near Surface Geophysics

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Processes that control permafrost warming in Alpine regions are still not completely understood. Recently, geoelectrical monitoring has emerged as a useful tool to investigate thawing and freezing processes. However, high resistive environments and harsh environmental conditions pose very unfavourable conditions for automated resistivity measurements. Based on the results of several test studies, an improved data acquisition system for geoelectrical monitoring of frozen soils was developed. Furthermore, the implementation of algorithms for statistical analysis of raw data time series led to a significant improvement in the reliability of inversion results. At two Alpine sites, namely Mölltaler Glacier and Magnetköpfl/Kitzsteinhorn, the adapted system was tested at soil temperature conditions between 0°C and -12°C. Data was continuously collected at both locations over nearly a full seasonal cycle. The results showed an almost linear dependency of resistivity and temperature at values above -0.5°C. At lower temperatures, the relation was non-linear, indicating that the reduction of porosity due to the shrinking of connected brine channels was the dominating process that determined the value of resistivity. Based on the derived results, further improvements were suggested, especially for measurements at soil temperatures below -4.5°C as low injection currents make it extremely challenging to gather these. permafrost regions is high priority. The advancement of innovative methods, such as geoelectrical monitoring, allowing all-seasonal, permanent monitoring of remote areas is in demand.The geoelectrical method determines the distribution of the specific electrical resistivity within the subsurface. The specific electrical resistivity mainly depends on porosity, water saturation, conductivity of pore fluid and clay content, and to a minor extent on particle shape and pore geometry. During the process of permafrost thawing and freezing, the volume fraction of the fluid phase (equivalent to a change in porosity), the connectivity of fluid areas and the salinity of the pore fluid is expected to vary. Therefore, geoelectrical monitoring could be an appropriate tool to investigate such processes.

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Section: Hardware Adaptations Of the Geomon 4d Geoelectrical System Tmentioning

confidence: 99%

Section: Development Of An Improved Measuring Technology For Permafromentioning

confidence: 99%

Geoelectrical monitoring of frozen ground and permafrost in alpine areas: field studies and considerations towards an improved measuring technology

Supper

Ottowitz

Jochum

et al. 2013

Near Surface Geophysics

View full text Add to dashboard Cite

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A Complex Geoscientiffic Strategy for Landslide Hazard Mitigation – Case Study Sibratsgfäll

Cited by 1 publication

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Geoelectrical monitoring of frozen ground and permafrost in alpine areas: field studies and considerations towards an improved measuring technology

Geoelectrical monitoring of frozen ground and permafrost in alpine areas: field studies and considerations towards an improved measuring technology

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