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Analysis of Clay-Induced Land Subsidence in Uppsala City Using Sentinel-1 SAR Data and Precise Leveling
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Computer and Geospatial Sciences, Geospatial Sciences. Lantmäteriet.ORCID iD: 0000-0003-1744-7004
Lantmäteriet; The Geological Survey of Sweden, Uppsala.
2020 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

Land subsidence and its subsequent hazardous effects on buildings and urban infrastructure areimportant issues in many cities around the world. The city of Uppsala in Sweden is undergoing significant subsidence in areas that are located on clay. Underlying clay units in parts of Uppsalaact as mechanically weak layers, which for instance, cause sinking of the ground surface and tilting buildings. In this study, a Persistent Scatterer InSAR (PSI) analysis was performed to map theongoing ground deformation in Uppsala. The subsidence rate measured with PSI was validatedwith precise leveling data at different locations. Two ascending and descending data sets wereanalyzed using SARPROZ software, with Sentinel-1 data from the period March 2015 to April 2019.After the PSI analyses, comparative permanent scatterer (PS) points and metal pegs (measuredwith precise leveling) were identified creating validation pairs. According to the PSI analyses,Uppsala was undergoing significant subsidence in some areas, with an annual rate of about 6mm/year in the line-of-sight direction. Interestingly, the areas of great deformation wereexclusively found on postglacial clay.

Place, publisher, year, edition, pages
2020. Vol. 7322
Keywords [en]
Uppsala, Deformation, Subsidence, InSAR, PSI, Clay, Geology
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:hig:diva-31556OAI: oai:DiVA.org:hig-31556DiVA, id: diva2:1388532
Conference
EGU General Assembly 2020, 3-5 May, Vienna, Austria
Note

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Available from: 2020-01-25 Created: 2020-01-25 Last updated: 2020-01-27Bibliographically approved

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Nilfouroushan, Faramarz

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard-cite-them-right
  • ieee
  • modern-language-association-8th-edition
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  • Other style
More styles
Language
  • sv-SE
  • en-GB
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  • nn-NB
  • de-DE
  • Other locale
More languages
Output format
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