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Summary of Proposal LAN2109

TitlePS-InSAR Analysis of Land Subsidence Related to Subway Construction and Earthquake over Urumqi in China
Investigator Xiong, Wenxiu - Central South University, Shool of Geosciences and Info-Physics
Team Member
Professor Li, Zhiwei - Central South University, Department of Geomatics
Professor Zhu, Jianjun - Central South University, Department of Geomatics
Lecturer Feng, Guangcai - Central South University, Department of Geomatics
SummaryInSAR is a relatively new and powerful technology for observing the Earth surface. The wide spatial coverage, high resolution and competitive measurement accuracy make it a very unique technology for many applications, including the generation of DEM and the mapping of ground settlement related to volcanoes, earthquakes, landslides and mankind activities. And D-InSAR is a useful technology for measuring surface deformation, but it is difficult to get robust deformation results using conventional differential InSAR method due to lack enough SAR images jointly used in SAR interferometry. Permanent Scatterer (PS) D-InSAR technology will be well used to monitor the temporal evolution of surface deformation in Urumqi. We have also applied for your tanDEM-X data for more precise DEM data. We will combine the data applied in this proposal and the previous tanDEM-X data to obtain deformation with better accuracy,which can be compared to the results using conventional SRTM data. We propose to use Permanent Scatterer (PS) technology to retrieve a temporal deformation sequence of Urumqi from a time series of SAR interferograms, the retrived deformation sequence reveals the development and evolution of the deformation, then we can obtain deformation models,and predict deformation in the future by analyzing the deformation models. Finally government can take steps to avoid hazards resulting from the deformation. The study is mainly funded by:(1) National Natural Science Foundation of China (Grant No. 41104003); (2)National Natural Science Foundation of China (Grant No. 41222027).

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