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

By: , and 



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. ?? 2007 IEEE.

Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Six years of land subsidence in shanghai revealed by JERS-1 SAR data
ISBN 1424412129; 9781424412129
DOI 10.1109/IGARSS.2007.4423246
Year Published 2008
Language English
Larger Work Title International Geoscience and Remote Sensing Symposium (IGARSS)
First page 2093
Last page 2097
Conference Title 2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
Conference Location Barcelona
Conference Date 23 June 2007 through 28 June 2007