| Title | Estimation of deformation intensity above a flooded potash mine near Berezniki (Perm Krai, Russia) with SAR interferometry |
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| Author | Samsonov, S ;
Baryakh, A |
| Source | Remote Sensing vol. 12, no. 19, 2020 p. 1-11, https://doi.org/10.3390/rs12193215  Open Access |
| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20200783 |
| Publisher | MDPI |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Area | Berezniki; Russian Federation |
| Lat/Long WENS | 55.0000 60.0000 60.0000 59.0000 |
| Subjects | Science and Technology; soils science; surficial geology/geomorphology; subsidence; sinkholes; potash; mining; radar imagery; synthetic aperture radar surveys (SAR) |
| Illustrations | satellite imagery; location maps; tables; plots |
| Program | Canada Centre for Remote Sensing RADARSAT Constellation Mission: Data Utilization Application Plan (DUAP) - InSAR |
| Released | 2020 10 02 |
| Abstract | In this study we used RADARSAT-2 and Sentinel-1 Synthetic Aperture Radar data for measuring subsidence above a flooded potash mine, which is almost entirely located within the city of Berezniki (Perm
Krai, Russia), population 150,000. This area has experienced very fast subsidence since October 2006 when the integrity of the Berezniki-1 mine was compromised, resulting in water intrusion, subsequent flooding and closure of the mine. Due to the
ongoing dissolution of carnallite, subsidence in this region is expected to continue in the foreseeable future. In addition to rapid subsidence, at least five sinkholes have formed in the region, with the largest being 440 x 320 m. We observed ground
subsidence during the period October 2011-April 2014 (RADARSAT-2) with a vertical rate up to 14 cm/year and horizontal rate up to 10 cm/year; during the period July 2016-June 2020 (Sentinel-1) with a vertical rate up to 17 cm/year. Our results were
validated by precise leveling, with a coefficient of correlation of 0.75. Subsidence faster than 17 cm/year observed by precise leveling was not resolvable with Differential Interferometric Synthetic Aperture Radar (DInSAR). Our results show the
complementary nature of ground-based and space-borne measurement techniques. The precise leveling captures subsidence along profile lines with high precision but lower temporal resolution, while DInSAR captures subsidence with high spatial and
temporal resolutions but with lower precision. DInSAR is also significantly affected by decorrelation outside of urban areas. An important advantage of our methodology is the ability to measure the horizontal east component of the ground deformation
when both, ascending and descending, data are available. This measurement directly characterizes the level of anthropogenic load on buildings and infrastructure. We recommend continuing monitoring subsidence using both measurement techniques, which
can also be complemented by continuous Global Navigation Satellite System (GNSS). |
| Summary | (Plain Language Summary, not published)
In this study we used RADARSAT-2 and Sentinel-1 Synthetic Aperture Radar data for measuring subsidence above a flooded potash mine during the two periods
October 2011-April 2014 and July 2016-June 2020. This area has experienced very fast subsidence since October 2006 when the integrity of the mine was compromised, resulting in water intrusion, subsequent flooding and closure of the mine. In addition
to rapid subsidence, at least five sinkholes have formed in the region. |
| GEOSCAN ID | 328167 |
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