Monitoring ground subsidence in Jiaxing region using Envisat data

Tao Li; Jicang Wu; Lina Zhang

doi:10.1117/12.912722

24 October 2011 Monitoring ground subsidence in Jiaxing region using Envisat data

Tao Li, Jicang Wu, Lina Zhang

Proceedings Volume 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications; 82861V (2011) https://doi.org/10.1117/12.912722
Event: International Symposium on Lidar and Radar Mapping Technologies, 2011, Nanjing, China

Abstract

Jiaxing is 110 kilometers far away from Shanghai, the high speed railway and the planed maglev from Shanghai to Hangzhou cross Jiaxing city. It is very important to monitor ground subsidence in Jiaxing region for the safe running of the high speed railways. However, the traditional ground subsidence measurement methods, such as precise leveling and GPS, have a very low spatial resolution and are laborious. DInSAR technology is a new effective method for monitoring ground subsidence with high resolution and accuracy, but due to the influence of many kinds of noises, the interferograms cannot reveal ground deformation directly. In this work, small baseline subset (SBAS) method is applied to extract the ground subsidence information. SBAS can reduce the effects of topographic error and spatial decorrelation, and also increase the number of useable InSAR pairs. Totally 13 scenes of the Envisat SAR images covering Jiaxing region between 2008 and 2009 are chosen and processed. The results show that a funnel shaped ground subsidence appears at Pinghu city.

Citation Download Citation

Tao Li, Jicang Wu, and Lina Zhang "Monitoring ground subsidence in Jiaxing region using Envisat data", Proc. SPIE 8286, International Symposium on Lidar and Radar Mapping 2011: Technologies and Applications, 82861V (24 October 2011); https://doi.org/10.1117/12.912722

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KEYWORDS

Synthetic aperture radar

Picosecond phenomena

Interferometry

Data processing

Interferometric synthetic aperture radar

Global Positioning System

Image processing

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