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| Titel |
Subsidence activity maps derived from DInSAR data: Orihuela case study |
| VerfasserIn |
M. P. Sanabria, C. Guardiola-Albert, R. Tomas, G. Herrera, A. Prieto, H. Sánchez, S. Tessitore |
| 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 Sciences ; 14, no. 5 ; Nr. 14, no. 5 (2014-05-27), S.1341-1360 |
| Datensatznummer |
250118452
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| Publikation (Nr.) |
 copernicus.org/nhess-14-1341-2014.pdf |
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| Zusammenfassung |
| A new methodology is proposed to produce subsidence activity maps based on
the geostatistical analysis of persistent scatterer interferometry (PSI)
data. PSI displacement measurements are interpolated based on conditional
Sequential Gaussian Simulation (SGS) to calculate multiple equiprobable realizations of
subsidence. The result from this process is a series of interpolated
subsidence values, with an estimation of the spatial variability and a
confidence level on the interpolation. These maps complement the PSI
displacement map, improving the identification of wide subsiding areas at
a regional scale. At a local scale, they can be used to identify buildings
susceptible to suffer subsidence related damages. In order to do so, it is
necessary to calculate the maximum differential settlement and the maximum
angular distortion for each building of the study area. Based on PSI-derived
parameters those buildings in which the serviceability limit state has been
exceeded, and where in situ forensic analysis should be made, can be
automatically identified. This methodology has been tested in the city of Orihuela
(SE Spain) for the study of historical buildings damaged during the last two
decades by subsidence due to aquifer overexploitation. The qualitative
evaluation of the results from the methodology carried out in buildings where damages have been
reported shows a success rate of 100%. |
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