Ground deformation monitoring in Pearl River Delta region with Stacking D-InSAR technique

Qing Zhao; Hui Lin; Liming Jiang

doi:10.1117/12.813017

3 November 2008 Ground deformation monitoring in Pearl River Delta region with Stacking D-InSAR technique

Qing Zhao, Hui Lin, Liming Jiang

Proceedings Volume 7145, Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Monitoring and Assessment of Natural Resources and Environments; 714513 (2008) https://doi.org/10.1117/12.813017
Event: Geoinformatics 2008 and Joint Conference on GIS and Built Environment: Geo-Simulation and Virtual GIS Environments, 2008, Guangzhou, China

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.

Citation Download Citation

Qing Zhao, Hui Lin, and Liming Jiang "Ground deformation monitoring in Pearl River Delta region with Stacking D-InSAR technique", 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); https://doi.org/10.1117/12.813017

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