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TitleMonitoring of urban subsidence in coastal cities: Case studies Vancouver and Seattle
AuthorSamsonov, SORCID logo; Tiampo, K
SourceProceedings of the 2016 Third International Conference on Digital Information Processing, Data Mining, and Wireless Communications (DIPDMWC); by IEEE; 2016 p. 36-39,
Alt SeriesEarth Sciences Sector, Contribution Series 20160246
Meeting2016 Third International Conference on Digital Information Processing, Data Mining, and Wireless Communications (DIPDMWC); Moscow; RU; July 06-08, 2016
Mediapaper; on-line; digital
File formatpdf
ProvinceBritish Columbia
NTS92G/02; 92G/03
AreaVancouver; Seattle; United States of America
Lat/Long WENS-123.2667 -122.9333 49.3333 49.1333
SubjectsNature and Environment; remote sensing; deformation; subsidence; radar imagery; coastal environment; flood potential; Multidimensional Small Baseline Subset Differential Interferometric SAR (MSBAS-DInSAR)
Illustrationslocation maps; graphs; tables; satellite images
ProgramRemote Sensing Science, Methodology
AbstractThe advanced processing methodology is presented for extracting information from earth observation data. Using imagery from various Synthetic Aperture Radar (SAR) satellites and Multidimensional Small Baseline Subset Differential Interferometric SAR (MSBAS-DInSAR) processing methodology we observed ground subsidence in Vancouver (British Columbia, Canada) and Seattle (Washington, USA). In Vancouver, subsidence with rate of up to 2 cm/year was detected during 1995¿2012 over a broad area, including the Vancouver International Airport. In Seattle, subsidence with rate of up to 3 cm/ year was detected during 2012¿2015. Between August 2014 and August 2015, unusually fast subsidence occurred beneath the city center. This subsidence is caused mainly by human activities, such as construction, urban infrastructure development and groundwater extraction, but also by natural processes, such as consolidation of sediments. Located in coastal areas, these cities may become affected by flooding if ground level subsides below the sea level or due to storm surge. The risk of flooding increases as the sea level continues to rise due to the climate change. The advanced image processing methodology of earth observation data described here allows near real-time monitoring of ground subsidence with high spatial resolution and high precision, therefore increasing level of preparedness and mitigating risk.
Summary(Plain Language Summary, not published)
We are developing methods for detecting ground deformation in urban environments using satellite radar. This study focused on the cities of Seattle and Vancouver. Additionally we produced deformation maps of background processes occurring at these regions. Subsidence was detected in both cities at a rate of 2-3 cm per year. The subsidence was due to both natural and anthropogenic activities. This research may be of interest to other scientists and industry specializing in geotechnical engineering.

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