Title :
Urban subsidence observed by InSAR in Tianjin Region
Author :
Zhang Shiyu ; Li Tao ; Liu Jingnan ; Xia Ye ; Jiang Yanxiang ; Lu Xu
Author_Institution :
Wuhan Univ., Wuhan
Abstract :
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.
Keywords :
radar interferometry; remote sensing by radar; spaceborne radar; surveying; synthetic aperture radar; topography (Earth); AD 2003 10 17 to 2005 02 17; D-InSAR technique; ENVISAT SAR images; Tianjin Region; leveling surveys; urban subsidence; Cities and towns; Coherence; Hazards; Image generation; Monitoring; Satellite navigation systems; Sea measurements; Synthetic aperture radar interferometry; Urban areas; Water resources; D-InSAR; Interferograms; Leveling surveys; Urban Subsidence;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 2007. IGARSS 2007. IEEE International
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-1211-2
Electronic_ISBN :
978-1-4244-1212-9
DOI :
10.1109/IGARSS.2007.4423242
