Monitoring and analyzing surface subsidence based on SBAS-InSAR in Beijing region, China

L. Zhou; J. M. Guo; X. Li

doi:10.1117/12.2208803

9 December 2015 Monitoring and analyzing surface subsidence based on SBAS-InSAR in Beijing region, China

L. Zhou, J. M. Guo, X. Li

Proceedings Volume 9808, International Conference on Intelligent Earth Observing and Applications 2015; 98081Y (2015) https://doi.org/10.1117/12.2208803
Event: International Conference on Intelligent Earth Observing and Applications, 2015, Guilin, China

Abstract

Surface subsidence is the main regional environmental geological disaster in plain area in China. The rapid growth of population, the over-exploitation of groundwater and the rapid development of urbanization impacts the occurrence and development of surface subsidence to some extent. The city of Beijing, located in the Beijing Plain, is one of international metropolis in China that experiences the severe surface subsidence. Because of conventional measurement methods with low spatial resolution, differential interferometric synthetic aperture radar(D-InSAR) is susceptible to signal decorrelation and atmospheric delay, persistent scatterer interferometric synthetic aperture radar(PS-InSAR) is based on a large number of SAR images, but small baseline subset interferometric synthetic aperture radar (SBASInSAR) only needs a small number of images and performs better than PS-InSAR for obtaining nonlinear deformation information, in this paper, SBAS-InSAR was used to obtain the high resolution surface subsidence information in Beijing region, China. A spatial-temporal analysis of the surface subsidence in Beijing region during the years of 2007- 2010 was performed utilizing eighteen C-band ENVISAT ASAR images (from August 1, 2007 to September 29, 2010). The results show that subsidence in Beijing region is severe uneven, subsidence funnels appear in Changping District, Shunyi District, Tongzhou District, Daxing District, etc., and many subsidence funnels are interconnected and have an eastward expansion trend; during the period of 2007 to 2010, the subsidence velocities are in the range of -158.5 mm/year to 12.4 mm/year and the maximum subsidence of subsidence center is over 400 mm; surface subsidence is influenced by groundwater exploitation and urbanization significantly.

Citation Download Citation

L. Zhou, J. M. Guo, and X. Li "Monitoring and analyzing surface subsidence based on SBAS-InSAR in Beijing region, China", Proc. SPIE 9808, International Conference on Intelligent Earth Observing and Applications 2015, 98081Y (9 December 2015); https://doi.org/10.1117/12.2208803

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