Temporal analysis of a landslide by means of a ground-based SAR Interferometer

Author

Leva, Davide ; Nico, Giovanni ; Tarchi, Dario ; Fortuny-Guasch, Joaquim ; Sieber, Alois J.

Author_Institution

Inst. for the Protection & Security of the Citizen, Joint Res. Centre of the Eur. Comm., Ispra, Italy

Volume

41

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

745

Lastpage

752

Abstract

A ground-based synthetic aperture radar (GB-SAR) interferometer is used to retrieve the velocity field of a landslide. High-resolution images are obtained by means of a time domain SAR processor. An in-depth analysis of the sequence of SAR interferograms enables the recognition of a slowly deforming upper scarp in the scene, and a debris flow that feeds the accumulation zone of the landslide, where a fast change in terrain morphology is observed. The estimated deformation map is in agreement with the available measurements obtained by means of Global Positioning System receivers. Results show that GB-SAR interferometry is a cost-effective solution for the monitoring of landslides. The proposed method is shown to be a valid complement to space- and airborne SAR and to the traditional geodetic instruments.

Keywords

geomorphology; geophysical techniques; radiowave interferometry; synthetic aperture radar; terrain mapping; 16.70 to 16.78 GHz; 700 to 1150 m; Austria; D-InSAR; GB-SAR interferometer; GPS receivers; Schwaz; Tyrol; accumulation zone; debris flow; deformation map; differential synthetic aperture radar interferometry; ground-based synthetic aperture radar interferometer; high-resolution images; interferogram sequence; landslide monitoring; landslides; phase image analysis; slowly deforming upper scarp; terrain morphology; velocity field; Feeds; Global Positioning System; Image sequence analysis; Instruments; Interferometry; Layout; Monitoring; Morphology; Position measurement; Terrain factors;

fLanguage

English

Journal_Title

Geoscience and Remote Sensing, IEEE Transactions on

Publisher

ieee

ISSN

0196-2892

Type

jour

DOI

10.1109/TGRS.2003.808902

Filename

1202960