| Title | Sentinel-1 and RADARSAT constellation mission InSAR assessment of slope movements in the Southern Interior of British Columbia, Canada |
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| Author | Choe, B -Y; Blais-Stevens, A ; Samsonov, S; Dudley, J |
| Source | Remote Sensing vol. 13, issue 19, 2021 p. 1-17, https://doi.org/10.3390/rs13193999  Open Access |
| Image |  |
| Year | 2021 |
| Alt Series | Natural Resources Canada, Contribution Series 20210260 |
| Publisher | MDPI |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | British Columbia |
| NTS | 92I; 92J; 92O; 92P; 93A; 93B |
| Lat/Long WENS | -124.0000 -120.0000 53.0000 50.0000 |
| Subjects | general geology; radar imagery; satellites; satellite imagery; slope stability; slope development; remote sensing; landslides; synthetic aperture radar surveys (SAR) |
| Illustrations | location maps; tables; graphs; satellite imagery; satellite images; plots |
| Program | Public Safety Geoscience Assessing landslides and marine geohazards |
| Released | 2021 10 06 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
This is a communication paper on the monitoring of slow moving earthflows in the southern Interior of British Columbia. It demonstrates the capacity of
Sentinel-1 InSAR results over a four year period and the newly launched RCM InSAR results in a four month window. |
| GEOSCAN ID | 328887 |
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