Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2019, Vol. 16, No. 2, pp. 69-74
First results of radar monitoring of the landslide consequences on the Bureya riverbank using Sentinel-1 data
L.N. Zakharova
1 , A.I. Zakharov
1 , L.M. Mitnik
2 1 V. A. Kotelnikov Institute of Radioengineering and Electronics RAS, Fryazino Branch, Fryazino, Russia
2 V. I. Il’ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
Accepted: 25.03.2019
DOI: 10.21046/2070-7401-2019-16-2-69-74
This paper presents first SAR interferometric measurements results of the assessment of aftermath of the landslide on the Bureya riverbank occurred in December 2018. Interferometric processing chain was applied to 18 image pairs acquired by Sentinel-1 satellite from December 5, 2018 to March 4, 2019. Analysis of processing results allowed estimating the landslide extent. Volume of soil slided down from the riverbank slope into the riverbed on December 12, 2018 was proved to be more than 18.5 million m3. The maximal vertical displacement of the scattering surface after the landslide reached 140–150 m with respect to the SRTM digital elevation model, the landslide area in the vertical projection is estimated to be about 22.8 ha. Differential radar interferometry technique was applied to reveal and confirm the stability of the landslide surface during three months after the catastrophic event. No noticeable displacement (above first millimeters) of the riverbank soils because of the blasting operations in the riverbed cofferdam in the end of January 2019 was detected.
Keywords: synthetic aperture radar (SAR), SAR interferometry, estimation of surface displacement, differential interferometry, landslide, digital elevation model
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