ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 5, pp. 147-155

Sentinel-1 InSAR for investigation of active deformation areas: case study of the coastal region of the Big Sochi

E.I. Smolianinova 1 , E.A. Kiseleva 1 , V.O. Mikhailov 1 
1 Schmidt Institute of Physics of the Earth RAS, Moscow, Russia
Accepted: 24.07.2019
DOI: 10.21046/2070-7401-2019-16-5-147-155
The paper discusses some aspects of Sentinel-1 (S-1) InSAR application to investigate active surface deformations, in particular landslides, in the coastal cluster of the Big Sochi. We created a map of active deformation areas (ADA) for the Sochi-Adler region based on 350 S-1A, and S-1B acquisitions from ascending and descending orbits for the 2015-2018 time period. For image processing we incorporated SBAS ENVI SARscape and PS StaMPS/MTI technologies. In case of the densely built-up territories of the study area the suggested methodology of interpretation of the S-1 InSAR results allowed us to update boundaries of landslides being previously revealed by ground survey as well as fix new landslides and areas of activation. Fragments of the updated map were presented. Comparing the ADA map to the map of landslide phenomena in accordance with ground survey (Vozhik, 2016) we showed that ground based and remote sensing data complemented each other and it appeared efficient to combine them when monitoring landslides in regions including both rural and built-up areas. Using time series of displacements for a number of active landslides we found out that activation of landslides in the study area usually takes place between November and June, however, some landslides move permanently at a rate up to 80 mm/year.
Keywords: SAR, InSAR, satellite monitoring, landslides, ground subsidence, Sentinel-1, Big Sochi
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