Abstract This study employs Interferometric Synthetic Aperture Radar (InSAR) data sets to monitor the surface deformation of the Nasr-Abad buried salt diapir in the Central Basin of Iran. The Nasr-Abad salt diapir is one of the largest buried salt diapir in Iran and could be ideal site for oil/gas storage and industrial waste disposal. Forty ENVISAT Advanced Synthetic Aperture Radar (ASAR) images acquired during 2003–2010 were used to monitor surface activities of this diapir and its surrounding regions in that time window. One hundred and one interferograms were generated from both descending and ascending orbits by applying the Small-BAseline Subset (SBAS) method. Tropospheric artefacts in the displacement interferograms were mitigated using the power law correction method in TRAIN software. A time series of line-of-sight (LOS) displacements on the residual cap of Lower Red Formation above the buried diapir was also generated as well as the area. Finally, the data for temperature, precipitation, and tidal forces were correlated with the time-series displacement results of four points A, B, C, and D that located on the residual cap. Our analyses of our data indicate that surface above the diapir and an area of about 28 square kilometres subsided with maximum LOS velocity of about 7 mm/year for ascending images and 5 mm/year for descending images. Comparing the temperature and precipitation data with the time-series of displacement confirmed that they correlated with the same seasonal effects. Monitoring the activities of the Nasr-Abad region over 7 years shows that the region of surface subsidence is confined to the area that relates directly to the geological structures of the region.

中文翻译：

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伊朗中部使用 InSAR 时间序列分析的埋藏 Nasr-Abad 盐底辟上方 7 年的地表变形

摘要 本研究采用干涉合成孔径雷达 (InSAR) 数据集监测伊朗中央盆地 Nasr-Abad 埋藏盐底辟的地表变形。Nasr-Abad 盐底辟是伊朗最大的埋藏盐底辟之一，可能是石油/天然气储存和工业废物处理的理想场所。2003-2010 年期间获得的 40 幅 ENVISAT 高级合成孔径雷达 (ASAR) 图像用于监测该底辟及其周围区域在该时间窗口内的地表活动。通过应用小基线子集 (SBAS) 方法，从下降轨道和上升轨道生成了 101 张干涉图。使用 TRAIN 软件中的幂律校正方法减轻位移干涉图中的对流层伪影。还生成了埋藏底辟上方的下红色地层残余盖层以及该区域的视线 (LOS) 位移时间序列。最后，将温度、降水和潮汐力数据与位于残盖上的 A、B、C 和 D 四个点的时间序列位移结果相关联。我们对数据的分析表明底辟上方的地表和大约 28 平方公里的区域以上升图像的最大 LOS 速度大约 7 毫米/年和下降图像的 5 毫米/年下降。将温度和降水数据与位移的时间序列进行比较，证实它们与相同的季节性影响相关。