城市地面沉降可导致建筑物开裂倾斜、地下基础设施损毁及次生灾害，对城市可持续发展造成严重影响。因此准确认识地面沉降的时空演化特征并厘清主要驱动机制，对于科学制定沉降监测方案和防控措施具有重要意义。文章基于SBAS-InSAR技术，利用2020年1月至2025年3月间覆盖赣州市城区的154景Sentinel-1A卫星影像，获取了地面沉降的时空分布
特征。结果表明，研究区80%的区域沉降速率处于-2~2 mm/y之间，局部区域沉降明显，主要集中于赣县区，最大年平均沉降速率达-26.4 mm/y。部分沉降中心呈现出明显的季节性波动特征，主要受降水入渗补给变化与地下水开采量强度大小共同影响。此外，新建建筑荷载扰动与河道泥沙淤积等人类活动亦在局部区域诱发明显地面沉降。该研究有利于了解赣州市地面沉降时空演化特征，进一步优化城市地面沉降监测方法，为提升城市地质灾害风险管控能力提供科学支撑。

Urban ground subsidence can lead to building cracks and tilting, damage to underground infrastructure, and secondary disasters, posing a serious threat to the sustainable development of cities. Therefore, accurately understanding the spatiotemporal evolution characteristics of ground subsidence and identifying its dominant driving mechanisms are of great significance for developing effective monitoring strategies and mitigation measures. This study utilized the Small Baseline Subset Interferometric Synthetic Aperture Radar (SBAS-InSAR) technique and analyzed 154 scenes of Sentinel-1A satellite imagery from January 2020 to March 2025 to obtain the spatiotemporal distribution characteristics of ground subsidence in the central urban area of Ganzhou City. The results show that 80% of the study area has subsidence rates between -2 and 2 mm/y; localized areas exhibit significant subsidence, primarily concentrated in Ganzhou County , with the highest annual average subsidence rate reaching -26.4 mm/y. Some subsidence centers exhibit distinct seasonal fluctuations, primarily influenced by variations in precipitation infiltration recharge and the intensity of groundwater extraction. Additionally, human activities such as the perturbation of the new construction loads and river sediment deposition also triggered significant ground subsidence in localized areas. This study contributes to understanding the spatiotemporal evolution characteristics of ground subsidence in Ganzhou City, further optimizes urban ground subsidence monitoring methods, and provides scientific support for enhancing the city’s geological hazard risk management capabilities.