Multi-temporal landslide activity investigation by spaceborne SAR interferometry

The case study of the Polish Carpathians

verfasst von: Kamila Pawluszek-Filipiak, Andrzej Borkowski, Mahdi Motagh
Abstract: The main goal of this research is to verify the activity state of landslides provided by an existing landslide inventory map using Persistent Scatterers (PS) Interferometry (PSInSAR). The study was conducted in the Małopolskie municipality, a rural setting with sparse urbanization in the Polish Flysch Carpathians. PSInSAR has been applied using Synthetic Aperture Radar (SAR) data from ALOS PALSAR and Sentinel 1A/B with different acquisition geometries (ascending and descending orbit) to increase PS coverage and mitigate the geometric effects due to layover and shadowing. The Line-Of-Sight PSInSAR measurements were projected to the steepest slope, which allowed to homogenize the results from diverse acquisition modes and to compare the displacement velocities with different slope orientations. Additionally, landslide intensity (motion rate) and expected damage maps were generated and verified during field investigations. A high correlation between PSInSAR results and in-situ damage observations was confirmed. The activity state and landslide-related expected damage maps have been confirmed for 43 out of a total of 50 landslides investigated in the field. The short temporal baseline provided by both Sentinel satellites (1A/B data) increases the PS density significantly. The study substantiates the usefulness of SAR based landslide activity monitoring for land use and land development, even in rural areas.
Organisationseinheit(en): Institut für Photogrammetrie und Geoinformation
Externe Organisation(en): Uniwersytet Przyrodniczy we Wrocławiu
Helmholtz-Zentrum Potsdam Deutsches GeoForschungsZentrum
Typ: Artikel
Journal: Remote Sensing Applications: Society and Environment
Band: 24
Publikationsdatum: 11.2021
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Geografie, Planung und Entwicklung, Computer in den Geowissenschaften
Ziele für nachhaltige Entwicklung: SDG 11 – Nachhaltige Städte und Gemeinschaften, SDG 15 – Lebensraum Land
Elektronische Version(en): https://gfzpublic.gfz-potsdam.de/rest/items/item_5008094_2/component/file_5008479/content (Zugang: Offen)
https://doi.org/10.1016/j.rsase.2021.100629 (Zugang: Offen)