Surface subsidence is a phenomenon where the surface elevation decreases due to various factors,which has significant impacts on urban infrastructure,flood risk,underground pipelines,and land resources.PS-InSAR technology offers advantages of millimeter-level precision,high-frequency monitoring,and high spatial resolution in monitoring surface deformation.The study takes Xi'an as a case study,and uses PS-InSAR technology to monitor surface subsidence.It is found that the subsidence mainly occurs in the Xixian New Area,which is related to over-extraction of groundwater and construction projects.Groundwater management measures and optimization of urban planning are key to mitigating the impacts of surface subsidence,which will help Xi'an to achieve sustainable development.
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