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| Titel |
Mapping and monitoring geomorphological processes in mountainous areas using PSI data: Central Pyrenees case study |
| VerfasserIn |
G. Herrera, J. C. Davalillo, J. Mulas, G. Cooksley, O. Monserrat, V. Pancioli |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 9, no. 5 ; Nr. 9, no. 5 (2009-09-24), S.1587-1598 |
| Datensatznummer |
250006981
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| Publikation (Nr.) |
 copernicus.org/nhess-9-1587-2009.pdf |
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| Zusammenfassung |
| In this paper the Stable Point Network technique, an established Persistent
Scatterer InSAR (PSI) technique, (SPN), has been applied for the first time
to the analysis of several geomorphological processes present in the
Gállego river basin (Central Pyrenees, Spain). The SPN coherence based
approach has been used to process three different SAR images datasets
covering two temporal periods: 1995 to 2001 and 2001 to 2007. This approach
has permitted the detection of more than 40 000 natural ground targets or
Persistent Scatterers (PSs) in the study area, characterised by the presence
of vegetation and a low urban density. Derived displacement maps have
permitted the detection and monitoring of deformations in landslides,
alluvial fans and erosive areas. In the first section, the study area is
introduced. Then the specifics of the SPN processing are presented. The
deformation results estimated with the SPN technique for the different
processed datasets are compared and analysed with previous available
geo-information. Then several detailed studies are presented to illustrate
the processes detected by the satellite based analysis. In addition, a
comparison between the performance of ERS and ENVISAT satellites with
terrestrial SAR has demonstrates that these are complementary techniques,
which can be integrated in order to monitor deformation processes, like
landslides, that over the same monitoring area may show very different
ranges of movement. The most relevant conclusions of this work are finally
discussed. |
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