Landslide Displacement Monitoring with Split-Bandwidth Interferometry: A Case Study of the Shuping Landslide in the Three Gorges Area

Landslides constitute a major threat to people’s lives and property in mountainous regions such, as in the Three Gorges area in China. Synthetic Aperture Radar Interferometry (InSAR) with its wide coverage and unprecedented displacement measuring capabilities has been widely used in landslide monito...

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Bibliographic Details
Published inRemote sensing (Basel, Switzerland) Vol. 9; no. 9; p. 937
Main Authors Shi, Xuguo, Jiang, Houjun, Zhang, Lu, Liao, Mingsheng
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2017
Subjects
Bandwidths
Canyons
corner reflector
Deformation
Displacement
Geological hazards
Global positioning systems
GPS
Image acquisition
Image resolution
Interferometric synthetic aperture radar
Interferometry
landslide
Landslides
Landslides & mudslides
Monitoring
Mountain regions
Noise sensitivity
Reflectors
Satellite navigation systems
split-bandwidth interferometry
the Three Gorges
Tracking
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Summary:Landslides constitute a major threat to people’s lives and property in mountainous regions such, as in the Three Gorges area in China. Synthetic Aperture Radar Interferometry (InSAR) with its wide coverage and unprecedented displacement measuring capabilities has been widely used in landslide monitoring. However, it is difficult to apply traditional InSAR techniques to investigate landslides having large deformation gradients or moving primarily in north-south direction. In this study, we propose a time series split-bandwidth interferometry (SBI) procedure to measure two dimensional (azimuth and range) displacements of the Shuping landslide in the Three Gorges area with 36 TerraSAR-X high resolution spotlight (HS) images acquired from February 2009 to April 2010. Since the phase based SBI procedure is sensitive to noise, we focused on extracting displacements of corner reflectors (CRs) installed on or surrounding the Shuping landslide. Our results agreed well with measurements obtained by the point-like targets offset tracking (PTOT) technique and in-situ GPS stations. Centimeter level accuracy could be achieved with SBI on CRs which shows great potential in futures studies on fast moving geohazards.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs9090937