地面沉降对于城市安全有重要影响，查明地面沉降至关重要。然而受数据范围限制以及研究方法的局限性，目前深圳市全境地面沉降时空分布仍不明确。首先基于时序合成孔径雷达干涉测量（multi-temporal interferometric synthetic aperture radar-M-InSAR）技术处理了P11F71、P113F71、P11F65三个不同的Frame共计534景SAR影像，生成了完整覆盖深圳市的形变速率图和形变时间序列。其次提取了显著形变区域，分析了形变区域的形变随时间的变化规律。结合光学影像所反映的地表人类活动，得出了各个显著沉降区域的沉降成因机制。研究发现：深圳市地面沉降多为施工引起，集中分布于深圳西部沿海区域，最大可达80 mm／年，位于东宝河入海口附近。自2017年3月—2023年6月的累计形变量可达500 mm；清林径水库由于水库扩容，需水量增加，导致地层压力显著增大，进而引起了地面沉降现象。城市区域InSAR地面沉降监测分析工作可弥补传统形变监测在时空分辨率方面的不足，为广域沉降防治提供有效建议。

Land subsidence has a significant impact on urban safety, making it crucial to investigate this phenomenon. However, due to limitations in data coverage and research methodologies, the spatiotemporal distribution of land subsidence across Shenzhen remains unclear. Multi-temporal interferometric synthetic aperture radar (MT-InSAR) technology was used to process a total of 534 Sentinel-1A SAR images from three different frames (P11F71, PI13F71, PI1F65), resulting in the generation of subsidence rate maps and subsidence time series that comprehensively cover the entire city of Shenzhen. Significant subsidence regions were then extracted, and the temporal evolution of subsidence in these areas was analyzed. By integrating optical imagery reflecting human activities on the earth's surface, the subsidence mechanisms in the identified areas were deduced. The results show that land subsidence in Shenzhen is primarily caused by construction activities, with the most significant subsidence occurring in the western coastal areas, reaching a maximum rate of 80 mm each gear near the estuary of Dongbao River. The cumulative subsidence from March 2017 to June 2023 amounted to 500 mm. The expansion of the Qinglinjing Reservoir has led to increased water demand, significantly raising formation pressure and causing land subsidence. InSAR-based land subsidence monitoring and analysis in urban areas can address the spatial and temporal resolution limitations of traditional monitoring methods, providing effective recommendations for large-scale subsidence prevention and control.