Updating Landslide Activity State and Intensity by Means of Persistent Scatterer Interferometry
Kamila Pawłuszek-Filipiak , Andrzej Borkowski
AbstractLandslide detection and characterisation are the fundamental activities performed to reduce economic losses caused by hazardous landslide events. Since existing landslide databases have to be updated, different techniques are used for this purpose. Last decades, satellite radar interferometry has increasingly been involved in this context. In this study, a sophisticated variant of radar interferometry, namely, the persistent scatterers interferometry (PSI) technique, was used to update the landslide activity state and landslide intensity in the area of Rożnów Lake in Poland. The study area is located in the Western Carpathians. Sentinel-1 A and B images covering almost the whole year 2017 were used. Ascending and descending images were processed separately by means of the PSI approach, and afterwards, PSI velocities were projected onto the slope direction. Then the results for ascending and descending orbits were merged into the database, and the landslide activity and intensity were assessed. The landslide state assessment was performed by means of a PSI-based matrix approach. The activity state of 205 landslides has been evaluated. As a result, the majority of the landslides have been assessed as active. The results are supported by field evidence. Moreover, the results suggest the need for updating the existing landslide inventory maps.
|Publication size in sheets||0.5|
|Book||Guzzetti Fausto, Mihalić Arbanas Snježana , Reichenbach Paola, Sassa Kyoji, Bobrowsky Peter T., Takara Kaoru (eds.): Understanding and Reducing Landslide Disaster Risk, Contribution to Landslide Disaster Risk Reduction, 2021, Springer, ISBN 978-3-030-60226-0, 505 p., DOI:10.1007/978-3-030-60227-7|
|Keywords in English||Landslide, Landslide state, PSI, SAR interferometry|
|Score||= 20.0, 15-01-2021, MonographChapterAuthor|
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