联合InSAR技术和地质数据反演普宁城区的地表沉降特征

地表沉降是全球性的地质灾害之一，地表的迅速沉降会导致地表塌陷，从而破坏地下管道及地表建筑，最后造成巨大的经济损失甚至人员伤亡。我国地下工程及地表建筑扩建规模较大，这种地质灾害问题尤为突出。目前，监测地表形变的方法有很多，如水准测量、GPS、InSAR技术等。但通常情况下这些技术只能对地表的高程变化进行定量分析，而无法寻找灾害发生的诱因，缺少对地表沉降时空特征的定性分析。本文以广东普宁地区为例，将InSAR技术与该地区的水文地质特征相结合，从而实现对地表沉降监测从数据采集、处理到成因分析的整个流程的把控。InSAR技术可以验证地质特征的合理性，而地质特征又可以对监测范围及监测周期进行更科学的指导。本文通过这种分析方法，既调查出普宁城区的沉降区域，又对其背后成因进行了系统性的分析，为后续的防治措施及国土空间规划提供了更科学的指导。

Joint InSAR technology and geological data to inverse the surface subsidence characteristics of Puning city

Surface subsidence is one of the global geological hazards problems. Rapid subsidence of the ground can lead to surface collapse, which can damage underground pipelines as well as surface buildings and eventually cause huge economic losses and even casualties. This geological hazards problem is particularly acute in China, where underground projects and surface buildings are undergoing massive expansion. There are many methods to monitor the surface deformation, such as level measurement, GPS, InSAR technology and so on. However, usually these techniques can only quantitatively analyze the elevation change of the ground surface, but cannot find out the causative factors for the occurrence of disasters, and lack qualitative analysis of the spatial and temporal characteristics of the ground settlement. In this paper, the InSAR technology is combined with the hydrogeology characteristics of the area. It takes the Puning area in Guangdong as an example, to realize the whole process of surface subsidence monitoring from data acquisition and processing to the analysis of the causes. In this paper, this analysis method not only investigates the subsidence area in the Puning city area, but also provides a systematic analysis of the causes behind it, which provides a more scientific guidance for the subsequent prevention and control measures.