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

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

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3705304k&link_type=abstract

Geophysical Research Letters, Volume 37, Issue 5, CiteID L05304

Physics

2

Geodesy And Gravity: Space Geodetic Surveys, Geodesy And Gravity: Instruments And Techniques, Geodesy And Gravity: Non-Tectonic Deformation

Scientific paper

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.

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