基于Sentinel-1A的南昌市时间序列InSAR地面沉降监测

本文基于2016-01~2018-07的Sentinel-1A数据,采用PS-InSAR和SBAS-InSAR时序处理方法获取南昌市主城区地面形变信息,对比2种监测结果,分析产生不均匀地面形变的原因。结果表明,2种时序技术的监测结果相关性较高,南昌市主城区的形变趋势为西北抬升、东南下沉。形变区空间分布存在梅岭抬升区、南昌西火车站沉降区、赣江东岸沉降区、邓家埠沉降区和南钢沉降区,主要受地质构造、含水层介质、地下水开采和城市建设等因素影响。

Land Subsidence Monitoring of Nanchang Area Based on Sentinel-1A Using Time Series InSAR Technology

Based on Sentinel-1A data from January 2016 to July 2018, we obtain the ground deformation information of the main urban area in Nanchang using PS-InSAR and SBAS-InSAR time series processing methods, compare the two monitoring results, and analyze the causes of uneven ground deformation. The results show that the monitoring results of the two time series technologies are highly correlated. The deformation trend of the main urban area of Nanchang City is northeast uplift and the southeast sinking. The spatial distribution of the deformation zone includes the Meiling uplift area, Nanchang west railway station subsidence area, Ganjiang east bank subsidence area, Dengjiabu subsidence area and Nangang subsidence area, which are mainly affected by factors such as geological structure, aquifer medium, groundwater exploitation and urban construction.