A new model for estimating subsurface ice content based on combined electrical and seismic data sets
Detailed knowledge of the material properties and internal structures of frozen ground is one of the prerequisites in many permafrost studies. In the absence of direct evidence, such as in-situ borehole measurements, geophysical methods are an increasingly interesting option for obtaining subsurface...
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ftethz:oai:www.research-collection.ethz.ch:20.500.11850/38919 2023-08-20T04:07:07+02:00 A new model for estimating subsurface ice content based on combined electrical and seismic data sets Hauck, Christian Böttcher, M. Maurer, Hansruedi 2011 application/application/pdf https://hdl.handle.net/20.500.11850/38919 https://doi.org/10.3929/ethz-b-000038919 en eng Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-5-453-2011 info:eu-repo/semantics/altIdentifier/wos/000292242500012 http://hdl.handle.net/20.500.11850/38919 doi:10.3929/ethz-b-000038919 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported The Cryosphere, 5 (2) info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftethz https://doi.org/20.500.11850/3891910.3929/ethz-b-00003891910.5194/tc-5-453-2011 2023-07-30T23:50:23Z Detailed knowledge of the material properties and internal structures of frozen ground is one of the prerequisites in many permafrost studies. In the absence of direct evidence, such as in-situ borehole measurements, geophysical methods are an increasingly interesting option for obtaining subsurface information on various spatial and temporal scales. The indirect nature of geophysical soundings requires a relation between the measured variables (e.g. electrical resistivity, seismic velocity) and the actual subsurface constituents (rock, water, air, ice). In this work, we present a model which provides estimates of the volumetric fractions of these four constituents from tomographic electrical and seismic images. The model is tested using geophysical data sets from two rock glaciers in the Swiss Alps, where ground truth information in form of borehole data is available. First results confirm the applicability of the so-called 4-phase model, which allows to quantify the contributions of ice-, water- and air within permafrost areas as well as detecting solid bedrock. Apart from a similarly thick active layer with enhanced air content for both rock glaciers, the two case studies revealed a heterogeneous distribution of ice and unfrozen water within Muragl rock glacier, where bedrock was detected at depths of 20–25 m, but a comparatively homogeneous ice body with only minor heterogeneities within Murtèl rock glacier. ISSN:1994-0416 ISSN:1994-0424 Article in Journal/Newspaper Ice permafrost The Cryosphere ETH Zürich Research Collection |
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Open Polar |
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ETH Zürich Research Collection |
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ftethz |
language |
English |
description |
Detailed knowledge of the material properties and internal structures of frozen ground is one of the prerequisites in many permafrost studies. In the absence of direct evidence, such as in-situ borehole measurements, geophysical methods are an increasingly interesting option for obtaining subsurface information on various spatial and temporal scales. The indirect nature of geophysical soundings requires a relation between the measured variables (e.g. electrical resistivity, seismic velocity) and the actual subsurface constituents (rock, water, air, ice). In this work, we present a model which provides estimates of the volumetric fractions of these four constituents from tomographic electrical and seismic images. The model is tested using geophysical data sets from two rock glaciers in the Swiss Alps, where ground truth information in form of borehole data is available. First results confirm the applicability of the so-called 4-phase model, which allows to quantify the contributions of ice-, water- and air within permafrost areas as well as detecting solid bedrock. Apart from a similarly thick active layer with enhanced air content for both rock glaciers, the two case studies revealed a heterogeneous distribution of ice and unfrozen water within Muragl rock glacier, where bedrock was detected at depths of 20–25 m, but a comparatively homogeneous ice body with only minor heterogeneities within Murtèl rock glacier. ISSN:1994-0416 ISSN:1994-0424 |
format |
Article in Journal/Newspaper |
author |
Hauck, Christian Böttcher, M. Maurer, Hansruedi |
spellingShingle |
Hauck, Christian Böttcher, M. Maurer, Hansruedi A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
author_facet |
Hauck, Christian Böttcher, M. Maurer, Hansruedi |
author_sort |
Hauck, Christian |
title |
A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
title_short |
A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
title_full |
A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
title_fullStr |
A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
title_full_unstemmed |
A new model for estimating subsurface ice content based on combined electrical and seismic data sets |
title_sort |
new model for estimating subsurface ice content based on combined electrical and seismic data sets |
publisher |
Copernicus |
publishDate |
2011 |
url |
https://hdl.handle.net/20.500.11850/38919 https://doi.org/10.3929/ethz-b-000038919 |
genre |
Ice permafrost The Cryosphere |
genre_facet |
Ice permafrost The Cryosphere |
op_source |
The Cryosphere, 5 (2) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-5-453-2011 info:eu-repo/semantics/altIdentifier/wos/000292242500012 http://hdl.handle.net/20.500.11850/38919 doi:10.3929/ethz-b-000038919 |
op_rights |
info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/3.0/ Creative Commons Attribution 3.0 Unported |
op_doi |
https://doi.org/20.500.11850/3891910.3929/ethz-b-00003891910.5194/tc-5-453-2011 |
_version_ |
1774718565924995072 |