Evaluation of the Stability of the Darbandikhan Dam after the 12 November 2017 Mw 7.3 Sarpol-e Zahab (Iran-Iraq Border) Earthquake
Evaluation of the Stability of the Darbandikhan Dam after the 12 November 2017 Mw 7.3 Sarpol-e Zahab (Iran-Iraq Border) Earthquake
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DOI：
10.3390/rs10091426
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发表时间：
2018-09-01
期刊：
影响因子：
5
通讯作者：
Edwards, Stuart
中科院分区：
文献类型：
--
作者：
Al-Husseinawi, Yasir;Li, Zhenhong;Edwards, Stuart
我们使用全球定位系统（GPS）、水准测量和Sentinel-1数据来评估2017年Mw 7.3 Sarpol-e Zahab地震后伊拉克东北部达尔班迪汗大坝的稳定性。利用2017年3月和11月收集的GPS和找平数据，计算了大坝的同震地表位移。利用2014年10月至2018年3月采集的Sentinel-1合成孔径雷达（SAR）图像，恢复大坝位移时间序列。坝顶上的大震级位移梯度阻碍了利用该中分辨率SAR资料估算同震位移。然而，Sentinel-1的图像足以检验地震前后大坝位移的稳定性。结果表明，大坝在2014年10月至2017年11月期间保持稳定，但在地震发生后，Sentinel-1数据显示，2017年11月至2018年3月期间坝顶持续下沉。据作者所知，这项研究是第一次利用InSAR来调查大地震后大坝的行为。
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.