Due to excessive harvesting of underground water resources in many important aquifers inside Iran, ground subsidence is occurring at different speeds. In present study, InSAR processing was applied to identify land displacement by using Sentinel-1A. For this target, 17 frames of images during 2015–2019 with small temporal-perpendicular baseline were allocated and using SBAS approach were analyzed. After removing unnecessary noise and phases, phase shift due to land deformation is extracted and then converted to subsidence. Besides SAR images, fluctuations of groundwater were analyzed using piezometric data for last 10 years. Then the spatial pattern relationship between subsided regions and underground water resources as well as urbanization was investigated. Throughout this period, all datasets reveal 125 km² bowl subsidence in a maximum rate of 10 cm/year. Generally, areas with high rates of subsidence are located between the industrial town and city of Semnan over clay foundation with high rates of groundwater head decline. Moreover, surveying the piezometers and landuse change map obtained from Landsat indicates that due to the intense groundwater withdrawal as a result of industrialization and urbanization, the maximum annual decline of groundwater head at 123 cm/year is detected. Our preliminary investigation shows some spatiotemporal positive correlation between the subsidence and seismicity of the area. Considering the fragility of arid ecosystems and increasing the population of Semnan, it is recommended that the development of industries with high water consumption is prevented and the groundwater resources policies should seek to strictly reduce overusing of groundwater in agricultural lands and urban areas.

由于伊朗内部许多重要含水层中地下水资源的过度开采，地面沉降以不同的速度发生。在本研究中，InSAR处理被用于使用Sentinel-1A识别土地流离失所。为此目标，在2015-2019年期间分配了17帧时间垂直于基线的图像，并使用SBAS方法进行了分析。消除不必要的噪声和相位后，将提取由于地面变形而引起的相移，然后将其转换为沉降。除了SAR图像外，还使用最近10年的测压数据分析了地下水的波动。然后研究了塌陷区与地下水资源的空间格局关系以及城市化进程。在此期间，所有数据集均显示125 km ²碗沉降的最大速率为10厘米/年。通常，沉降率高的地区位于工业基地和塞姆南市之间的粘土基础上，地下水位下降率很高。此外，对从Landsat获得的压力计和土地利用变化图进行的调查表明，由于工业化和城市化导致大量的地下水抽取，因此可测出的最大地下水压年下降量为123 cm /年。我们的初步调查显示该地区的沉降与地震活动之间存在时空正相关。考虑到干旱生态系统的脆弱性和塞姆南人口的增长，