EGU21-3671
https://doi.org/10.5194/egusphere-egu21-3671
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Monitoring on land subsidence in reclaimed land with space-based synthetic aperture radar observations.

Seo-Woo Park1 and Sang-Hoon Hong2
Seo-Woo Park and Sang-Hoon Hong
  • 1Pusan National University, Earth Environmental System, Geological Sciences Major Division, Korea, Republic of (pwn1231@pusan.ac.kr)
  • 2Pusan National University, Earth Environmental System, Geological Sciences Major Division, Korea, Republic of (geoshong@pusan.ac.kr)

Land subsidence is often occurred by compaction of alluvial sediments due to groundwater extraction and threatens invaluable lives and properties. Space-based interferometric Synthetic Aperture Radar (SAR) observation has been widely used to estimate surface displacement precisely. Especially, Small BAseline Subset (SBAS) technique with SAR Interferometry (InSAR) could serve to monitor a time-series of the land subsidence. In this study, the SBAS with L-band ALOS PALSAR and C-band Sentinel-1 observations have been applied to investigate the land subsidence in Noksan reclaimed land, Busan, South Korea. The average velocity showing the largest displacement is -3.40 cm/year from ALOS PALSAR and -2.17 cm/year with Sentinel-1 dataset at the line of sight (LOS) direction. An annual subsidence rate of -2.77 cm/year was estimated assuming that the surface has been deformed linearly for the data acquisition period.

How to cite: Park, S.-W. and Hong, S.-H.: Monitoring on land subsidence in reclaimed land with space-based synthetic aperture radar observations., EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3671, https://doi.org/10.5194/egusphere-egu21-3671, 2021.

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