Journal
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
Volume 11, Issue 6, Pages 751-762Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1475921712451953
Keywords
Forensic analysis; differential synthetic aperture radar interferometry; ground subsidence; Gothic church; historic building monitoring
Funding
- Generalitat Valenciana fellowship [BEST-2011/225]
- European Space Agency (ESA) Terrafirma project
- [TEC-2008-06764]
- [TEC2011-28201-C02-02 ACOMP/2010/082]
- [VIGROB-157]
- [15224/PI/10]
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The Santas Justa and Rufina Gothic church (fourteenth century) has suffered several physical, mechanical, chemical, and biochemical types of pathologies along its history: rock alveolization, efflorescence, biological activity, and capillary ascent of groundwater. However, during the last two decades, a new phenomenon has seriously affected the church: ground subsidence caused by aquifer overexploitation. Subsidence is a process that affects the whole Vega Baja of the Segura River basin and consists of gradual sinking in the ground surface caused by soil consolidation due to a pore pressure decrease. This phenomenon has been studied by differential synthetic aperture radar interferometry techniques, which illustrate settlements up to 100 mm for the 1993-2009 period for the whole Orihuela city. Although no differential synthetic aperture radar interferometry information is available for the church due to the loss of interferometric coherence, the spatial analysis of nearby deformation combined with fieldwork has advanced the current understanding on the mechanisms that affect the Santas Justa and Rufina church. These results show the potential interest and the limitations of using this remote sensing technique as a complementary tool for the forensic analysis of building structures.
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