Multi-temporal landslide activity investigation by spaceborne SAR interferometry
The case study of the Polish Carpathians
- authored by
- 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.
- Organisation(s)
-
Institute of Photogrammetry and GeoInformation (IPI)
- External Organisation(s)
-
Wrocław University of Environmental and Life Sciences
Helmholtz Centre Potsdam - German Research Centre for Geosciences (GFZ)
- Type
- Article
- Journal
- Remote Sensing Applications: Society and Environment
- Volume
- 24
- Publication date
- 11.2021
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Geography, Planning and Development, Computers in Earth Sciences
- Sustainable Development Goals
- SDG 11 - Sustainable Cities and Communities, SDG 15 - Life on Land
- Electronic version(s)
-
https://gfzpublic.gfz-potsdam.de/rest/items/item_5008094_2/component/file_5008479/content (Access:
Open)
https://doi.org/10.1016/j.rsase.2021.100629 (Access: Open)