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Proceedings Paper

Ground deformation monitoring in Pearl River Delta region with Stacking D-InSAR technique
Author(s): Qing Zhao; Hui Lin; Liming Jiang
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Paper Abstract

The main problems, temporal and geometrical decorrelation, atmospheric signal, limited the analysis and interpretation of Differential SAR (D-InSAR) interferometric signal. The Permanent Scatterers (PS) Technique which can detect discrete and temporarily stable natural reflectors using at least 25 images was developed shortly after. However, for some regions, there are not enough available archived SAR images. The Stacking D-InSAR technique, using a stack of SAR images (<20scenes), with the generated a set of unwrapped differential interferograms, can estimate the linear differential phase rate. This research employs 6 ENVISAT ASAR images to study the ground deformation in The Pearl River Delta region with Stacking D-INSAR technique. Obvious ground subsidence trend is found around Guang Zhou, Fo Shan and Dong Guan where the urbanization process was very fast in the past 20 years. In order to validate the stacking result, Persistent Scatterer technique with limited images is also applied. From the deformation velocity map obtained by stacking technique, it is found the deformation velocity rate at some places seems higher. The main reason is probably the presence of atmospheric artifacts. The deformation trend shown in both Stacking technique and the Persistent Scatterer technique result are consistent in Haizhu district and Yuexiu district in Guangzhou.

Paper Details

Date Published: 3 November 2008
PDF: 9 pages
Proc. SPIE 7145, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Monitoring and Assessment of Natural Resources and Environments, 714513 (3 November 2008); doi: 10.1117/12.813017
Show Author Affiliations
Qing Zhao, The Chinese Univ. of Hong Kong (Hong Kong, China)
Hui Lin, The Chinese Univ. of Hong Kong (Hong Kong, China)
Liming Jiang, The Chinese Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 7145:
Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Monitoring and Assessment of Natural Resources and Environments
Lin Liu; Xia Li; Kai Liu; Xinchang Zhang; Yong Lao, Editor(s)

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