NDLI: Six years of land subsidence in shanghai revealed by JERS-1 SAR data

Content Provider	IEEE Xplore Digital Library
Author	Damoah-Afari, P. Xiao-li Ding Zhiwei Li Zhong Lu Omura, M.
Copyright Year	2007
Description	Author affiliation: Hong Kong Polytech. Univ., Hong Kong (Damoah-Afari, P.; Xiao-li Ding; Zhiwei Li)
Abstract	Differential interferometric synthetic aperture radar (SAR) (DInSAR) has proven to be very useful in mapping and monitoring land subsidence in many regions of the world. Shanghai, China's largest city, is one of such areas suffering from land subsidence as a result of severe withdrawal of groundwater for different usages. DInSAR application in Shanghai with the C-band European Remote Sensing 1 & 2 (ERS-1/2) SAR data has been difficult mainly due to the problem of decorrelation of InSAR pairs with temporal baselines larger than 10 months. To overcome the coherence loss of C-band InSAR data, we used eight L-band Japanese Earth Resource Satellite (JERS-1) SAR data acquired during 2 October 1992 to 15 July 1998 to study land subsidence phenomenon in Shanghai. Three of the images were used to produce two separate digital elevation models (DEMs) of the study area to remove topographic fringes from the interferograms used for subsidence mapping. Six interferograms were used to generate 2 different time series of deformation maps over Shanghai. The cumulative subsidence map generated from each of the time series is in agreement with the land subsidence measurements of Shanghai city from 1990 - 1998, produced from other survey methods.
Starting Page	2093
Ending Page	2097
File Size	1019139
Page Count	5
File Format	PDF
ISBN	9781424412112
DOI	10.1109/IGARSS.2007.4423246
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-07-23
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Synthetic aperture radar interferometry Synthetic aperture radar Remote monitoring Cities and towns Decorrelation Coherence L-band Earth Satellites Digital elevation models Coherence Analysis Differential interferometry DInSAR Land Subsidence JERS-1
Content Type	Text
Resource Type	Article

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