NDLI: Using differential SAR interferometry to map land subsidence: a case study in the Pingtung Plain of SW Taiwan

Content Provider	Springer Nature Link
Author	Hsieh, Chia Sheng Shih, Tian Yuan Hu, Jyr Ching Tung, Hsin Huang, Mong Han Angelier, Jacques
Copyright Year	2011
Abstract	Synthetic aperture radar (SAR) interferometry (InSAR) is a geodetic tool widely applied in the studies of earth-surface deformation. This technique has the benefits of high spatial resolution and centimetre-scale accuracy. Differential SAR interferometry (DInSAR) is used to measure ground deformation with repeat-pass SAR images. This study applied DInSAR and persistent scatterers InSAR (PSInSAR) for detecting land subsidence in the Pingtung Plain, southern Taiwan, between 1995 and 2000. In recent years, serious land subsidence occurred along coastal regions of Taiwan as a consequence of over-pumping of underground water. Results of this study revealed that the critical subsidence region is located on the coast near the estuary of Linpien River. It is also found that subsidence was significantly higher during the dry season than the wet season. The maximum annual subsidence rate of the dry season is up to −11.51 cm/year in critical subsidence region and the vertical land movement rate is much slower during the wet season. The average subsidence rates in wet and dry seasons are −0.31 and −3.37 cm/year, respectively. As a result, the subsidence rate in dry seasons is about 3 cm larger than in wet seasons.
Starting Page	1311
Ending Page	1332
Page Count	22
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	58
Issue Number	3
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-02-18
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	SAR inteferometry DInSAR PSInSAR Land subsidence Pingtung Plain Civil Engineering Environmental Management Geophysics/Geodesy Geotechnical Engineering Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

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