RETRIEVAL OF THE LONG TERM GROUND SETTLEMENT OF OCEAN RECLAIMED LAND IN SHANGHAI WITH MULTI-PLATFORM TIME-SERIES INSAR

摘要

In this study, we present a Differential Synthetic Aperture Radar (DInSAR) analysis of the ground displacement that impacts the ocean-reclaimed areas of the Nanhui New City of Shanghai (China), based on jointly exploiting Persistent Scatterers (PS) and Small Baseline (SB) approaches. The mean deformation velocity maps and corresponding interferometric time-series of deformation were initially cross-compared. We also performed a joint C-/X- band DInSAR analysis through the Small BAseline Subset (SBAS) algorithm over the ocean-reclaimed areas to better understand the long-lasting ground settlement process. The joint exploitation of different sets of SAR acquisitions collected at distinctive frequency bands and the knowledge of time-dependent models for the expected subsidence in ocean-reclaimed platforms is helpful to retrieve long-term displacement time series, thus allowing us to get new insights about the future evolution of the reclamation area settlements over the next years.