作者: L. Zhou , J. M. Guo , X. Li
DOI: 10.1117/12.2208803
关键词:
摘要: Surface subsidence is the main regional environmental geological disaster in plain area China. The rapid growth of population, over-exploitation of groundwater and development urbanization impacts occurrence and development surface to some extent. city Beijing, located Beijing Plain, one of international metropolis China that experiences severe subsidence. Because conventional measurement methods with low spatial resolution, differential interferometric synthetic aperture radar(D-InSAR) susceptible to signal decorrelation atmospheric delay, persistent scatterer radar(PS-InSAR) is based on a large number SAR images, but small baseline subset radar (SBASInSAR) only needs images performs better than PS-InSAR for obtaining nonlinear deformation information, this paper, SBAS-InSAR was used obtain high resolution information in Beijing region, A spatial-temporal analysis region during years 2007- 2010 performed utilizing eighteen C-band ENVISAT ASAR (from August 1, 2007 September 29, 2010). The results show uneven, funnels appear Changping District, Shunyi District, Tongzhou Daxing etc., many are interconnected have an eastward expansion trend; period 2010, velocities range -158.5 mm/year 12.4 mm/year maximum center over 400 mm; is influenced by exploitation significantly.