Active landslide mapping based on full-resolution EGMS products
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2024-01-09 21:22
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NECULA, Nicușor, NICULIȚĂ, Mihai. Active landslide mapping based on full-resolution EGMS products. In: Sisteme Informaționale Geografice: In memoriam Prof. Univ. Emerit. dr. Ioan DONISĂ, Ed. 29, 30 martie 2023, Iași. Iași : GIS and Remote Sensing, 2023, Ediția 29, p. 29.
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Sisteme Informaționale Geografice
Ediția 29, 2023
Simpozionul "Sisteme Informaționale Geografice"
29, Iași, Romania, 30 martie 2023

Active landslide mapping based on full-resolution EGMS products


Pag. 29-29

Necula Nicușor, Niculiță Mihai
 
Alexandru Ioan Cuza University of Iaşi
 
 
Disponibil în IBN: 5 aprilie 2023


Rezumat

Landslide deformations have become a significant threat in the nowadays context of climate change and global urbanization. Fortunately, depending on their typology, some landslides can be identified and mapped in a first stance, and further monitoring and mitigating policies can be implemented. In our case, we focus on the slow-moving landslides with typical velocities of 16 mm/year, specific to our study area. To identify the active landslides, we exploit the European Ground Motion Service products, which consist of temporal measurements based on the Sentinel-1 SAR images and processed with Multi-temporal Differential SAR Interferometry techniques. The EGMS program provides consistent and reliable InSAR measurements of ground deformations over the Copernicus Participating States. The products consist of measurements with millimeter accuracy, which can be accessed and downloaded from the platform. The measurements include GNSS-calibrated full-resolution velocity and displacement time series for the ascending and descending orbits and calculated displacement vectors in the vertical and E-W directions, resampled to a 100 x 100 m grid. Hence, exploiting the full-resolution data of the ascending and descending orbit, we successfully identified areas with active displacements produced by landslides. Besides the raw displacements, we also calculated the velocities of the horizontal and vertical components and projected the velocities along the maximum slope. These measurements are more suitable for the spatial assessment of the landslide and to validate the deformation mechanism.