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Abstract

Summary

Mapping geohazards of various scales, such as earthquakes and landslides, by Interferometric Synthetic Aperture Radar (InSAR) techniques, has been widely used in recent years. Monitoring landslide deformation with InSAR can help us better understand the mass propagation and motion evolution in space and time, respectively, and the driving factors. Saein landslide event in 2005 destroyed at least 350 m of Ardebil-Sarab roadway and power lines. The maximum horizontal and vertical displacement during the landslide were 10–20 m and 7–10 m, respectively. We selected three monitoring points in the study area to perform time-series analysis using the Sentinel-1 wide swath data acquired from 01.01.2019 to 08.04.2021 in descending orbit. In P-1 and P-3, creeping rates vary from +10.5 ± 0.5 to +22.0 ± 1.0 mm/yr and 6.1 ± 0.8 to 24.0 ± 2.0 mm/yr, respectively. Whereas the maximum creeping rates in P-2 are +7.0 ± 1.0 to −40 ± 2.0 mm/yr. The average velocity in P-1, P-2, and P-3 are 1.70, -16.5, and 3.20 mm/yr, respectively. Our results indicate that the existence of crushed zones in volcano-clastic rocks and volcanogenic sedimentary units due to the activity of the Yamchi Fault Zone has reduced stability along the slopes and accelerated creep movements.

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/content/papers/10.3997/2214-4609.202149BGS87
2021-10-10
2024-04-27

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Sentinel-1 InSAR Time-series Monitoring of Saein Creeping Landslides in Ardebil, NW Iran
Conference Proceedings 2021, 1 (2021); https://doi.org/10.3997/2214-4609.202149BGS87
/content/papers/10.3997/2214-4609.202149BGS87
/content/papers/10.3997/2214-4609.202149BGS87
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