Evaluation of the Stability of the Darbandikhan Dam after the 12 November 2017 Mw 7.3 Sarpol-e Zahab (Iran–Iraq Border) Earthquake
Autor: | Peter Clarke, Stuart Edwards, Zhenhong Li, Yasir Al-Husseinawi |
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Rok vydání: | 2018 |
Předmět: |
Synthetic aperture radar
010504 meteorology & atmospheric sciences GPS Displacement gradient 0211 other engineering and technologies 02 engineering and technology earthfill dam 01 natural sciences Stability (probability) InSAR Interferometric synthetic aperture radar surveying lcsh:Science 021101 geological & geomatics engineering 0105 earth and related environmental sciences Levelling business.industry Subsidence monitoring earthquake Global Positioning System General Earth and Planetary Sciences lcsh:Q Crest business Seismology Geology |
Zdroj: | Remote Sensing, Vol 10, Iss 9, p 1426 (2018) Remote Sensing; Volume 10; Issue 9; Pages: 1426 |
ISSN: | 2072-4292 |
Popis: | We used a global positioning system (GPS), levelling, and Sentinel-1 data to evaluate the stability of the Darbandikhan dam in northeast Iraq after the 2017 Mw 7.3 Sarpol-e Zahab earthquake. GPS and levelling datasets collected in March and November 2017 were used to compute the co-seismic surface displacements of the dam. Sentinel-1 synthetic aperture radar (SAR) images collected between October 2014 and March 2018 were employed to recover the displacement time series of the dam. The large-magnitude displacement gradient on the dam crest hindered the estimation of the co-seismic displacement using this medium-resolution SAR data. However, Sentinel-1 images are sufficient to examine the stability of the dam displacement before and after the earthquake. The results show that the dam was stable between October 2014 and November 2017, but after the earthquake, Sentinel-1 data shows a continuous subsidence of the dam crest between November 2017 and March 2018. To the best knowledge of the authors, this study is the first that utilises InSAR to investigate the behaviour of a dam after a large earthquake. |
Databáze: | OpenAIRE |
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