| Titre | Estimation of deformation intensity above a flooded potash mine near Berezniki (Perm Krai, Russia) with SAR interferometry |
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| Auteur | Samsonov, S ;
Baryakh, A |
| Source | Remote Sensing vol. 12, no. 19, 2020 p. 1-11, https://doi.org/10.3390/rs12193215  Accès ouvert |
| Image |  |
| Année | 2020 |
| Séries alt. | Ressources naturelles Canada, Contribution externe 20200783 |
| Éditeur | MDPI |
| Document | publication en série |
| Lang. | anglais |
| DOI | https://doi.org/10.3390/rs12193215 |
| Media | papier; en ligne; numérique |
| Formats | pdf |
| Région | Berezniki |
| Lat/Long OENS | 55.0000 60.0000 60.0000 59.0000 |
| Sujets | affaissement; dolines; potasse; exploitation minière; imagerie radar; Sciences et technologie; pédologie; géologie des dépôts meubles/géomorphologie |
| Illustrations | imagerie satellitaire; cartes de localisation; tableaux; graphiques |
| Programme | Centre canadien de télédétection Mission de la Constellation RADARSAT : Plan d'utilisation appliquée des données (PUAD) - InSAR |
| Diffusé | 2020 10 02 |
| Résumé | (disponible en anglais seulement)
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). |
| Sommaire | (Résumé en langage clair et simple, non publié)
Dans cette étude, nous avons utilisé les données du radar à synthèse d'ouverture RADARSAT-2 et Sentinel-1 pour mesurer la subsidence au-dessus
d'une mine de potasse inondée pendant les deux périodes octobre 2011-avril 2014 et juillet 2016-juin 2020. Cette zone a connu une subsidence très rapide depuis octobre 2006, date à laquelle l'intégrité de la mine a été compromise, ce qui a entraîné
une intrusion d'eau, puis une inondation et la fermeture de la mine. En plus de l'affaissement rapide, au moins cinq dolines se sont formées dans la région. |
| GEOSCAN ID | 328167 |
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