Measurements and predictions of subsidence induced by soil consolidation using persistent scatterer InSAR and a hyperbolic model

Sang Wan Kim, Shimon Wdowinski, Timothy H. Dixon, Falk Amelung, Jeong Woo Kim, Joong Sun Won

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39 Citations (Scopus)

Abstract

A space-borne SAR interferometric technique is presented for measuring and predicting ground subsidence associated with soil consolidation. Instead of a conventional constant velocity model, a hyperbolic model is introduced for persistent scatterer SAR interferometry (PSI) processing. Twenty three JERS-1 SAR acquired between 1992 and 1998 were used to measure land subsidence in Mokpo city, Korea which had been primarily built on land reclaimed from the sea. Two subsidence field maps were derived and compared: a constant velocity model and a hyperbolic model. Non-linear components depending on the stage of soil consolidation are well represented by the hyperbolic model. The maximum subsidence velocity reaches over 6 cm/yr, while the maximum acceleration is about −0.3 to −0.4 cm/year2. The predicted subsidence rate with the new model was validated by using later ENVISAT SAR data for 2004–2005. Prediction accuracy with the non-linear model is improved significantly, indicating the importance of a physically-based deformation model.

Original languageEnglish
Article numberGRL26709
JournalGeophysical Research Letters
Volume37
Issue number5
DOIs
Publication statusPublished - 2010 Mar 1

Bibliographical note

Funding Information:
We thank NASA and ONR for support. The research was supported by the National Research Lab. Project (M1‐0302‐00‐0063) of Korea Ministry of Science and Technology. This work was also supported by the Korea Research Foundation grant (KRF‐2009‐013‐C00051). CSTARS contribution 26.

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

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