A-DInSAR Performance for Updating Landslide Inventory in Mountain Areas: An Example from Lombardy Region (Italy)

Geosciences

Paolo Mazzanti¹  Francesca Bozzano¹  Alfredo Rocca²  Benedetta Antonielli²  Luca Dei Cas³ 

[1] CERI Research Center, “Sapienza” University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy;;Department of Earth Sciences &NHAZCA S.r.l., spin-off “Sapienza” University of Rome, Via Vittorio Bachelet 12, 00185 Rome, Italy;

关键词: satellite SAR interferometry;    geohazards;    landslide state of activity;    landslide inventory;    satellite acquisition geometry;   

DOI  :  10.3390/geosciences9090364

来源: DOAJ

【 摘 要 】

This work focuses on the capabilities and limitations of the Advanced Satellite SAR (Synthetic Aperture Radar) Interferometry (A-DInSAR) in wooded and mountainous regions, with the aim to get insights on the performances for studying slow-moving landslides. The considered critical issues are related to the SAR acquisition geometries (angle of incidence of the satellite line of sight, ascending and descending geometries) and to the physical and morphological features of the slopes (land use, aspect and slope angles), which influence the measuring points coverage. 26 areas in Lombardy Region (Italy), affected by known slope instability phenomena, have been analyzed through A-DInSAR technique, using COSMO-SkyMed images. The results allowed to outline general considerations about the effectiveness of A-DInSAR analysis of a single dataset (descending or ascending dataset), selected accordingly to the aspect of the slopes. Moreover, we aimed to quantitatively describe the capability to update the state of activity of several previously mapped landslides using satellite SAR Interferometry results. Although in a wooded and mountainous region, where the chances of retrieving radar targets for satellite SAR analysis are generally low, the A-DInSAR results have allowed to detect landslides’ reactivations or new landslides and to update the inventory for about 70% of the investigated areas.

【 授权许可】

Unknown