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Authors: Medhat, Noha Ismail* 
Yamamoto, Masa‐yuki* 
Tolomei, Cristiano* 
Harbi, Assia* 
Maouche, Said* 
Title: Multi‐temporal InSAR analysis to monitor landslides using the small baseline subset (SBAS) approach in the Mila Basin, Algeria
Journal: Terra Nova 
Series/Report no.: /34 (2022)
Publisher: Wiley
Issue Date: Mar-2022
DOI: 10.1111/ter.12591
Keywords: Landslides
Landslide monitoring using MT-InSAR technique in Algeria
Abstract: Hazardous ground deformation and landslides occur frequently in the Mila Basin, Algeria and this problem remains unsolved. However, the historical seismicity in the area indicates no severe damage from past earthquakes. For this reason, studies are needed to monitor the slow ground movements and their triggering factors. Since about two decades ago, satellite observations by interferometric synthetic aperture radar (InSAR) technique and the multi-temporal (MT-InSAR) technique have provided a tool for monitoring slow and extremely slow ground displacements. In this study, 2D decomposition of InSAR outputs revealed a sliding surface at two regions located 12 km apart, indicating slow motion rather than fast movement along the damaged area. We concluded that the factors leading to surface displacement in the investigated area include the triggering earthquakes, precipitation, terrain topography and soil moisture. This study contributes to landslide hazard identification and risk assessment in the Mila Basin.
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