TY - JOUR
T1 - Transient deformation induced by groundwater change in Taipei metropolitan area revealed by high resolution X-band SAR interferometry
AU - Tung, Hsin
AU - Chen, Horng Yue
AU - Hu, Jyr Ching
AU - Ching, Kuo En
AU - Chen, Hongey
AU - Yang, Kuo Hsin
N1 - Funding Information:
The comments and suggestions from two anonymous reviewers are deeply appreciated. This study was supported by Drunken Moon Lake Research Platform between National Taiwan University and Academia Sinica ( 102R3257 and 103R3253 ). The support is also from Ministry of Science and Technology Taiwan under the grant 102–2811-M-002-065 . Leveling data is provide by Central Geological Survey, MOEA ( 102-5226904000-06-01 , 103-5226904000-04-01 and 104-5226904000-03-01 ). We are grateful to Fabio Bovenga, Janusz Wasowski and Akiko Tanaka for their valuable comments and suggestions
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/12/5
Y1 - 2016/12/5
N2 - We present precise deformation velocity maps for the two year period from September 2011 to July 2013 of the northern Taiwan area, Taipei, by using persistent scatterer interferometry (PSI) technique for processing 18 high resolution X-band synthetic aperture radar (SAR) images archived from COSMO-SkyMed (CSK) constellation. According to the result, the highest subsidence rates are found in Luzou and Wuku area in which the rate is about 15 mm/yr and 10 mm/yr respectively in the whole dataset. However, dramatic change from serve subsidence to uplift in surface deformation was revealed in the Taipei Basin in two different time spans: 2011/09–2012/09 and 2012/09–2013/07. This result shows good agreement with robust continuous GPS measurement and precise leveling survey data across the central Taipei Basin. Moreover, it also represents high correlation with groundwater table. From 8 well data in the Taipei basin, the storativity is roughly constant across most of the aquifer with values between 0.5 × 10− 4 and 1.6 × 10− 3 in Jingmei Formation and 0.8 × 10− 4 and 1.4 × 10− 3 in Wuku Formation. This high correlation indicated that one meter groundwater level change could induce about 9 and 16 mm surface deformation change in Luzou and Wuku area respectively, which is about eight times faster the long-term tectonic deformation rate in this area. Thus, to access the activity of the Shanchiao Fault, it is important to discriminate tectonic movement from anthropogenic or seasonal effect in the Taipei Basin to better understand the geohazards and mitigation in the Taipei metropolitan area.
AB - We present precise deformation velocity maps for the two year period from September 2011 to July 2013 of the northern Taiwan area, Taipei, by using persistent scatterer interferometry (PSI) technique for processing 18 high resolution X-band synthetic aperture radar (SAR) images archived from COSMO-SkyMed (CSK) constellation. According to the result, the highest subsidence rates are found in Luzou and Wuku area in which the rate is about 15 mm/yr and 10 mm/yr respectively in the whole dataset. However, dramatic change from serve subsidence to uplift in surface deformation was revealed in the Taipei Basin in two different time spans: 2011/09–2012/09 and 2012/09–2013/07. This result shows good agreement with robust continuous GPS measurement and precise leveling survey data across the central Taipei Basin. Moreover, it also represents high correlation with groundwater table. From 8 well data in the Taipei basin, the storativity is roughly constant across most of the aquifer with values between 0.5 × 10− 4 and 1.6 × 10− 3 in Jingmei Formation and 0.8 × 10− 4 and 1.4 × 10− 3 in Wuku Formation. This high correlation indicated that one meter groundwater level change could induce about 9 and 16 mm surface deformation change in Luzou and Wuku area respectively, which is about eight times faster the long-term tectonic deformation rate in this area. Thus, to access the activity of the Shanchiao Fault, it is important to discriminate tectonic movement from anthropogenic or seasonal effect in the Taipei Basin to better understand the geohazards and mitigation in the Taipei metropolitan area.
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U2 - 10.1016/j.tecto.2016.03.030
DO - 10.1016/j.tecto.2016.03.030
M3 - Article
AN - SCOPUS:84975303557
SN - 0040-1951
VL - 692
SP - 265
EP - 277
JO - Tectonophysics
JF - Tectonophysics
ER -