Land-surface deformation corresponding to seasonal ground-water fluctuation, determining by SAR interferometry in the SW Taiwan

Chang, Chung Pai; Chang, Teng-Hsiang; Wang, C. T.; Kuo, Ching-Huei; Chen, K. S.

doi:10.1016/j.matcom.2004.06.003

Cited by 32 publications

(25 citation statements)

References 9 publications

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“…For the 11 stations of the southern Pingtung Plain closest to the sea, east of the Kaoping River and west of the Chaouchou Fault, the vertical land movement rates of the period 1995-2005 range from -7 to -28 mm/year, with an average value of -17 mm/year. In more detail, some seasonal changes in surface subsidence rate in the Pingtung Plain have been observed by Chang et al (2004a) using the InSAR technique, which was interpreted as caused by the fluctuations of water table level. How far these present-day rates, which are affected by human activity, can be extrapolated in the past is a crucial issue.…”

Section: Tectonic Backgroundmentioning

confidence: 99%

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

Hsieh

Shih

et al. 2011

Nat Hazards

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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.

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Section: Tectonic Backgroundmentioning

confidence: 99%

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

Hsieh

Shih

et al. 2011

Nat Hazards

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“…In contrast, the dry season, from November to March gives only about 10% of annual rainfall. Over the last few years, it has been observed that the rate of land subsidence is quite fast on the Pingtung plain (Chang et al 2004c;Hou et al 1997Hou et al , 1998. Moreover, the subsidence rates vary very greatly between seasons.…”

Section: 2b Human Activitymentioning

confidence: 99%

Application of Space-borne Radar Interferometry on Crustal Deformations in Taiwan: A Perspective from the Nature of Events

Chang¹,

Chen²,

Wang³

et al. 2004

Terr. Atmos. Ocean. Sci.

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ABSTRACT1 Center for Space and Remote Sensing Research, National Central University, Chung-Li, Taiwan, ROC 2 Department of Geosciences, National Central University, Chung-Li, Taiwan, ROC The orogen of Taiwan is young and active as indicated by the elevation of its topography and dense seismicity. Ongoing crustal deformations therefore cause considerable damage. Taiwan's high population density means that mitigation of geological hazards has become an urgent task. This paper reviews our recent results using the radar interferometry technique to study crustal deformation in Taiwan. In order to better describe our approach and the limitations of this technique, we have classified crustal deformation into intense and gentle events reflecting different deformation styles. Five case studies of deformation events using DInSAR images have been reported. They are: the coseismic deformation of the Chi-Chi earthquake, uplift of the Tainan area, active deformation of the Hukuo area, rapid land-subsidence in the Chungli area, and seasonal-varied landsubsidence in the Pingtung area. Our results show that this technique is worth developing for future study of neo-tectonic activity and environmental change.

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“…Over the years, precise leveling, global positioning system (GPS) and interferometric synthetic aperture radar (InSAR) have proven to be powerful techniques in the field of geodesy. Many studies have applied these techniques for land subsidence monitoring and prediction (Reilinger et al 1977;Dixon 199l;Yu and Chen 1994;Galloway et al 1998;Massonnet and Feigl 1998;Ferretti et al 2001;Sato et al 2003;Chang et al 2004;Hooper et al 2004Hooper et al , 2007; Galloway and Burbey 2011; Yen et al 2011;Wu et al 2013). …”

Section: Introductionmentioning

confidence: 99%

“…Differential interferometric synthetic aperture radar (DInSAR) is an alternative for mapping the spatial distribution of land subsidence at a relatively high resolution (Galloway et al 1998;Hoffmann et al 2001Hoffmann et al , 2003Calderhead et al 2011). This approach has been applied in quantifying land subsidence in many areas of Taiwan (e.g., Chang et al 2004;Hung et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Geostatistical Data Fusion of Multiple Type Observations to Improve Land Subsidence Monitoring Resolution in the Choushui River Fluvial Plain, Taiwan

Chang

et al. 2016

Terr. Atmos. Ocean. Sci.

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Precise leveling, global positioning system (GPS), and interferometric synthetic aperture radar (InSAR) have had marked influences on the geodesy field. Many studies have applied these techniques to land subsidence monitoring and predictions. Land subsidence in the Choushui River Fluvial Plain (CRFP) in western central Taiwan is severe, primarily because of excessive groundwater pumping. Exploiting various observational techniques this study employed a geostatistical cokriging algorithm to integrate multiple types of observations for mapping land subsidence in the CRFP between 1993 and 2008 to effectively reduce the regional effects and interpolation biases in InSAR observations. Precise leveling data and persistent scatterer InSAR results were first assessed through variogram analysis, the results of which revealed similar directional variograms and no nugget effect for the experimental variograms. All observed sill values decreased with increasing temporal intervals and the ranges of the same type of observations tended to be stable for time intervals of different lengths. The accuracy of a cokriged land subsidence map was verified using continuous GPS data at the same cell locations and was significantly improved compared to when the precise leveling data were used. The cokriging interpolations of land subsidence in the CRFP indicated that the severe subsidence areas had moved from the coastal area to the central CRFP. An obvious critical subsidence migration point for the southern CRFP occurred in 1998. Overall subsidence rate trends increased in the early periods (1993 -1998 and 1998 -2003) and decreased in the most recent period (2005 -2008).

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Land-surface deformation corresponding to seasonal ground-water fluctuation, determining by SAR interferometry in the SW Taiwan

Cited by 32 publications

References 9 publications

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

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

Application of Space-borne Radar Interferometry on Crustal Deformations in Taiwan: A Perspective from the Nature of Events

Geostatistical Data Fusion of Multiple Type Observations to Improve Land Subsidence Monitoring Resolution in the Choushui River Fluvial Plain, Taiwan

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