Zhang Shiyu, Li Tao, Liu Jingnan, X. Ye, Jiang Yanxiang, Lu Xu
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Urban subsidence observed by InSAR in Tianjin Region
In this paper, we present the results of D-InSAR technique and conventional leveling at selected area in Tianjin city, using 8 ENVISAT SAR images between 17 October 2003 and 17 February 2005.The D-InSAR results show that the subsidence rate reached over 5 cm/year (7 cm within 16 months) in highly sinking area, and it is consistent with leveling results. D-InSAR is able to provide more details of urban subsidence, and it is supplement to leveling surveys in those areas with sparse leveling benchmarks.
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