为揭示江东新区地面沉降的时空特征及成因，采用小基线集合成孔径雷达干涉测量（small baseline subset interferometric synthetic aperture radar, SBAS-InSAR）技术，对2018年1月至2024年2月期间的175景Sentinel-1A影像数据进行处理，提取了地面形变参数。研究发现，江东新区的沉降速率经历了由极慢到快再到慢的变化，形成了多个严重沉降区域，主要分布在交通干线沿线及填海造陆区。在此基础上，定性及定量分析了地面沉降的主要诱发因素，包括不良工程地质条件、填海造陆区的固结沉降以及土地利用方式变化等。沉降速率的加剧与区域的快速开发建设紧密相关，其中地面的过度荷载已成为地面沉降的主要影响因素。

In order to reveal the spatiotemporal distribution characteristics and causative factors of the ground subsidence in Jiangdong New District, SBAS-InSAR(small baseline subsets interferometric synthetic aperture radar) technology was adopted to process and analyze 175 scenes of Sentinel-1A imagery data from January 2018 to February 2024, extracting the deformation parameters. The study found that the subsidence rate in Jiangdong New District has undergone a variation from very slow to fast and then back to slow, forming several severe subsidence areas mainly distributed along major traffic arteries and reclamation areas. The main causative factors of the subsidence were qualitatively and quantitatively analyzed, which include poor engineering geological conditions, consolidation in the reclamation areas, and land use change, etc. The acceleration of subsidence rate is closely related to the rapid development and construction of the region, among which the excessive load on the ground surface is becoming the main influencing factor of subsidence.