Spatio-temporal characterization of a reclamation settlement in the Shanghai coastal area with time series analyses of X-, C-, and L-band SAR datasets

Spatio-temporal characterization of a reclamation settlement in the Shanghai coastal area with time series analyses of X-, C-, and L-band SAR datasets

Yang, M. (TU Delft Mathematical Geodesy and Positioning; Wuhan University)
Yang, Tianliang (Ministry of Land and Resources; Shanghai Institute of Geological Survey)
Zhang, L. (Collaborative Innovation Center for Geospatial Technology)
Lin, Jinxin (Ministry of Land and Resources; Shanghai Institute of Geological Survey)
Qin, Xiaoqiong (Wuhan University)
Liao, Mingsheng (Wuhan University; Collaborative Innovation Center for Geospatial Technology)

2018-02-01

Large-scale reclamation projects during the past decades have been recognized as one of the driving factors behind land subsidence in coastal areas. However, the pattern of temporal evolution in reclamation settlements has rarely been analyzed. In this work, we study the spatio-temporal evolution pattern of Linggang New City (LNC) in Shanghai, China, using space-borne synthetic aperture radar interferometry (InSAR) methods. Three data stacks including 11 X-band TerraSAR-X, 20 L-band ALOS PALSAR, and 35 C-band ENVISAT ASAR images were used to retrieve time series deformation from 2007 to 2010 in the LNC. An InSAR analysis from the three data stacks displays strong agreement in mean deformation rates, with coefficients of determination of about 0.9 and standard deviations for inter-stack differences of less than 4 mm/y. Meanwhile, validations with leveling data indicate that all the three data stacks achieved millimeter-level accuracies. The spatial distribution and temporal evolution of deformation in the LNC as indicated by these InSAR analysis results relates to historical reclamation activities, geological features, and soil mechanisms. This research shows that ground deformation in the LNC after reclamation projects experienced three distinct phases: primary consolidation, a slight rebound, and plateau periods.

ALOS PALSAR
ENVISAT ASAR
Lingang New City
Reclamation settlements
TerraSAR-X
Time series InSAR analysis

http://resolver.tudelft.nl/uuid:3c190cb2-528e-4da9-90d8-deeec548e356

https://doi.org/10.3390/rs10020329

2072-4292

Remote Sensing, 10 (2)

Institutional Repository

journal article

© 2018 M. Yang, Tianliang Yang, L. Zhang, Jinxin Lin, Xiaoqiong Qin, Mingsheng Liao