Use of SAR Interferometry for Landslide Analysis in the Arno River Basin

Landslides represent major natural hazards, which cause every year significant loss of lives and damages to buildings, properties and lifelines. In the last decades, a significant increase in landslide frequency took place, in concomitance to climate change and the expansion of urbanized areas. Remote sensing techniques represent a powerful tool for landslide investigation: applications are traditionally divided into three main classes, although this subdivision has some limitations and borders are sometimes fuzzy. The first class comprehends techniques for landslide recognition, i.e., the mapping of past or active slope failures. The second regards landslide monitoring, which entails both ground deformation measurement and the analysis of any other changes along time (e.g., land use, vegetation cover). The third class groups methods for landslide hazard analysis and forecasting. The aim of this paper is to give an overview on the applications of remote-sensing techniques for the three categories of landslide investigations, focusing on the achievements of the last decade, being that previous studies have already been exhaustively reviewed in the existing literature. At the end of the paper, a new classification of remote-sensing techniques that may be pertinently adopted for investigating specific typologies of soil and rock slope failures is proposed.

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“…Also at a wider scale, landslide hazard databases can be enriched by landslide activity information given by PSI [285].…”

Section: Model Validationmentioning

confidence: 99%

Remote Sensing for Landslide Investigations: An Overview of Recent Achievements and Perspectives

et al. 2014

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“…This is true for basin-scale works and for articles showing multiple case studies. The Arno River Basin, including five different Tuscan provinces, is an example of this [31][32][33][34][35][36][37][38]. Video S1 proposes an additional visual interpretation of the temporal evolution of the scientific production at regional scale.…”

Section: Spatial Distribution Of the Insar Applicationsmentioning

confidence: 99%

Review of Satellite Interferometry for Landslide Detection in Italy

et al. 2020

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Landslides recurrently impact the Italian territory, producing huge economic losses and casualties. Because of this, there is a large demand for monitoring tools to support landslide management strategies. Among the variety of remote sensing techniques, Interferometric Synthetic Aperture Radar (InSAR) has become one of the most widely applied for landslide studies. This work reviews a variety of InSAR-related applications for landslide studies in Italy. More than 250 papers were analyzed in this review. The first application dates back to 1999. The average production of InSAR-related papers for landslide studies is around 12 per year, with a peak of 37 papers in 2015. Almost 70% of the papers are written by authors in academia. InSAR is used (i) for landslide back analysis (3% of the papers); (ii) for landslide characterization (40% of the papers); (iii) as input for landslide models (7% of the papers); (iv) to update landslide inventories (15% of the papers); (v) for landslide mapping (32% of the papers), and (vi) for monitoring (3% of the papers). Sixty-eight percent of the authors validated the satellite results with ground information or other remote sensing data. Although well-known limitations exist, this bibliographic overview confirms that InSAR is a consolidated tool for many landslide-related applications.

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“…We have obtained the copyright permissions to use already published figures). Brugioni et al, 2013) and for the assessment of hazard and risk (Lu et al, 2014). In particular, interesting works that include innovative statistical PSI-based elaborations, are found in Lu et al (2010Lu et al ( , 2012, namely the PSI-HSR (PSI -Hue and Saturation Representation) and the PSI-HCA (PSI -Hotspot and Cluster Analysis) (Figure 1).…”

Section: Past Insar Records Over Tuscany Regionmentioning

confidence: 99%

“…Tuscany region (Italy) has been long monitored with InSAR data (e.g., Canuti et al, 2005;Lu et al, 2010;Brugioni et al, 2013;Bianchini et al, 2015;Solari et al, 2016;Rosi et al, 2018) and it is nowadays the first Italian region to test a continuous interferometric analysis based on Sentinel-1 PSI (Persistent Scatterers Interferometry) products for monitoring geo-hazards with a 6 days repeatability.…”

Section: Introductionmentioning

confidence: 99%

From Picture to Movie: Twenty Years of Ground Deformation Recording Over Tuscany Region (Italy) With Satellite InSAR

et al. 2018

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Synthetic Aperture Radar Interferometry (InSAR) techniques have been long exploited for detecting and mapping slow-moving ground surface displacements due to their millimeter accuracy, non-invasiveness and wide area coverage. A review on different applications of Persistent Scatterers InSAR approaches, proposed and applied over Tuscany region (Italy) across time, is here presented. The study area is characterized by both subsidence of alluvial plains and landslides on hilly and mountainous reliefs. Tuscany has a leading role in Italy in the field of interferometric applications: the first InSAR analyses, which date back to 2003, were performed at local basin scale, by exploiting various PSI-based approaches for risk mapping. The first InSAR applications at regional scale date back to 2009, relying on historical SAR archives of ERS and ENVISAT satellites for updating subsidence and landslide inventory maps at a certain temporal date. Nowadays, the availability of Sentinel-1 SAR data with a regular and systematic 6-days acquisitions plan, allows near-real time monitoring of deformative scenario at regional scale rather than solely mapping of geo-hydrological phenomena. Most recent innovative InSAR applications over Tuscany region scan the territory, exploiting the regular repeat pass of Sentinel-1, and promptly highlight the sites affected by the highest ground movements with high temporal frequency. Such approaches permit us to pass from a static 'picture' of regional slope instability to a weekly updated 'movie' with improved detail, useful for civil protection practices. These last ongoing works significantly enhance the value of multi-temporal InSAR approaches for investigating and managing geo-hazards over the Region.

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Use of SAR Interferometry for Landslide Analysis in the Arno River Basin

Cited by 4 publications

References 15 publications

Remote Sensing for Landslide Investigations: An Overview of Recent Achievements and Perspectives

Remote Sensing for Landslide Investigations: An Overview of Recent Achievements and Perspectives

Review of Satellite Interferometry for Landslide Detection in Italy

From Picture to Movie: Twenty Years of Ground Deformation Recording Over Tuscany Region (Italy) With Satellite InSAR

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