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Sentinel-1 and RADARSAT Constellation Mission InSAR Assessment of Slope Movements in the Southern Interior of British Columbia, Canada
Content Provider | MDPI |
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Author | Choe, Byung-Hun Blais-Stevens, Andrée Samsonov, Sergey Dudley, Jonathan |
Copyright Year | 2021 |
Description | Landslides are the most common natural hazard in British Columbia. The province has recorded the largest number of historical landslide fatalities in Canada, and damage to infrastructure comes at a great cost. In order to understand the potential impacts of landslides, radar remote sensing has become a cost-effective method for detecting downslope movements. This study investigates downslope movements in the Southern Interior of British Columbia, Canada, with Sentinel-1 and RADARSAT Constellation Mission (RCM) interferometric synthetic aperture radar (InSAR) data. The 2-dimensional time-series analysis with Sentinel-1 ascending and descending InSAR pairs from October 2017 to June 2021 observed distinct earthflow movements of up to ~15 cm/year in the east–west direction. The Grinder Creek, Red Mountain, Yalakom River, and Retaskit Creek earthflows previously documented are still active, with east–west movements of ~30 cm over the past four years. New RCM data acquired from June 2020 to September 2020 with a 4-day revisit capability were compared to 12-day Sentinel-1 InSAR pairs. The 4-day RCM InSAR pairs at higher spatial resolution showed better performance by detecting relatively small-sized slope movements within a few hundred meters, which were not clearly observed by Sentinel-1. The temporal variabilities observed from the RCM InSAR showed great potential for observing detailed slope movements within a narrower time window. |
Starting Page | 3999 |
e-ISSN | 20724292 |
DOI | 10.3390/rs13193999 |
Journal | Remote Sensing |
Issue Number | 19 |
Volume Number | 13 |
Language | English |
Publisher | MDPI |
Publisher Date | 2021-10-06 |
Access Restriction | Open |
Subject Keyword | Remote Sensing Sentinel-1 Radarsat Constellation Mission (rcm) Interferometric Sar (insar) Slope Movement British Columbia |
Content Type | Text |
Resource Type | Article |