| Technology and Methodology |
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An analysis of surface deformation in the Changzhi mining area using small baseline InSAR |
| LIU Zhimin, LI Yongsheng, ZHANG Jingfa, LUO Yi, LIU Bin |
| Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China |
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Abstract Small baseline subset(SBAS) algorithm has been widely applied to time series analysis for measuring surface deformation by overcoming InSAR limitations caused by temporal decorrelation, spatial decorrelation and atmospheric inhomogeneity. To monitor the ground deformation in Changzhi area effectively, the authors applied DInSAR method to study large deformation that happened in one month or even a shorter time in the mining area, and the maximum subsidence was 11cm during 30 days. Then the authors obtained the time series deformation results from July 2003 to July 2010 in Changzhi area by using SBAS algorithm, and made time series analysis of the residential area with large deformation rate which kept high coherence around the mining area by SBAS monitoring results. From the deformation maps, the authors found that subsidence was obvious in the study area, and the subsidence rate was 5~15mm/a, with the maximum accumulated subsidence being 90 mm. Different ore districts presented different deformation results due to their differences in such factors as production time, production way, reserves and topography.
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| Keywords
Bayes decision
high-performance airborne synthetic aperture Radar system(HASARS)
polarimetric SAR
landslide hazard
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Issue Date: 01 July 2014
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2014,
Vol. 26
