Monitoring ground surface deformation over the North China Plain using coherent ALOS PALSAR differential interferograms

被引:0
作者
Kui Zhang
Linlin Ge
Xiaojing Li
Alex Hay-Man Ng
机构
[1] The University of New South Wales,Geodesy and Earth Observing Systems Group (GEOS), School of Surveying and Geospatial Engineering
来源
Journal of Geodesy | 2013年 / 87卷
关键词
Radar interferometry; Interferogram stacking techniques; Ground displacement; Deformation time-series ; North China Plain;
D O I
暂无
中图分类号
学科分类号
摘要
North China Plain (Huabei Plain) is one of the most densely populated regions on earth. Due to excessive underground water extraction, the North China Plain has been experiencing severe ground deformation over the last three decades. Therefore, for the purpose of hazard mitigation, it is necessary to monitor the ground displacement occurred in this region. As an extension of the differential radar interferometry (DInSAR) technique, advanced DInSAR techniques involving multiple images have demonstrated the potential to effectively map ground displacement. Such techniques are able to measure the temporal evolution of ground deformation with millimetre-level accuracy by using a stack of differential interferograms. In this study, the ALOS PALSAR data acquired over the North China Plain, which cover an area of approximately 16,000 km\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$^2$$\end{document}, were processed based on the concept of advanced DInSAR techniques. Because of the large size of the PALSAR images, a targeted processing strategy was designed. This strategy is able to reduce required disk storage space and I/O operations, leading to the improvement of the computational efficiency. The resulting mean deformation velocity map demonstrates that a large portion of the area covered by the data was affected by various degrees of ground deformation between January 2007 and April 2010. The ground deformation is mostly distributed in rural areas, while the downtown areas are generally stable.
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页码:253 / 265
页数:12
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