The feasibility of measuring land subsidence on landfill using multi-temporal SAR Interferometry

World Cup park was developed on landfill. Because landfill subsides over the long term,subsidence has to be estimated periodically. Recently, some study group observed its subsidence usingTerraSAR and ALOS PALSAR data. They suggested that the coherence of landfill park is largelydependent on the temporal baseline rather than a wavelength of a radar signal. These results aremeaningful since they provided the effective approach to measure time-series deformation on the landfillparks. However, additional quantitative study for the various perpendicular and temporal baselines shouldbe performed. In this study, we performed the study about "The feasibility of measuring land subsidenceon landfill park using multi-temporal SAR Interferometry". For this, we added C-band Sentinel-1 data tothe previous study. We acquired 3 years of images for each band and conducted quantitative analysis abouttemporal baseline and perpendicular baseline using coherence maps. Besides, we analyzed about seasonalfactors for all bands. Based on the coherence analysis results, we selected proper interferometric pairs toapply multi-temporal SAR interferometry. Refined small baseline subset was employed in consideration ofthe area where mostly covered by vegetation. This study would contribute to enhance efficiency of thelong-term subsidence monitoring on the landfill.