期刊
JOURNAL OF APPLIED REMOTE SENSING
卷 10, 期 -, 页码 -出版社
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.JRS.10.026014
关键词
SBAS D-InSAR; deformation; surface subsidence; GPS
资金
- National Natural Science Foundation of China [41204003, 41304020]
- State Key Laboratory Breeding Base of Nuclear Resources and Environment [NRE508]
Jinan, located in the South of the North China Plain, is an area where underground water has been exploited excessively. However, land deformation surveys only focus on the small district obtained by GPS and Leveling. Here, we use interferometric synthetic aperture radar (InSAR) time-series of ASAR data to resolve land subsidence in the entire Jinan region. In our research, we get 20 interferograms with a temporal threshold of 700 days and spatial-baseline threshold of 300 m from 14 ASAR satellite images on a descending orbit, and then get the surface displacement using Small Baseline InSAR (SBAS D-InSAR) retrained with a periodic model. Meanwhile, the accuracy of our work is proved by the results of GPS measurements. Finally, several settlement funnels are observed with extreme values of -20 cm, and their generation is related to massive groundwater extraction. (c) 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
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