Monitoring land subsidence in Cangzhou region using InSAR technology
With development of cities, damage due to land subsidence becomes more and more severe. Although routine measures for determining subsidence have higher accuracy, their costs are very high, their sample density is very low, and their intervals between determinations are very long. Accordingly, routine techniques cannot satisfy the demands of modern society. Interferometric Synthetic Aperture Radar (InSAR) has become the technique in their place, with the most potential. It can sample densely, measure land subsidence in short intervals, and its cost is cheaper. For example, in the region of Cangzhou, land subsidence had amounted up to 2236 mm in 2001. This paper introduces the essential principles of Interferometric Synthetic Aperture Radar (InSAR) and the processing of InSAR data. In addition, it reports an experimental InSAR land subsidence study in the Cangzhou region. Results of the Cangzhou region study are reported and the utility of the InSAR methodology is discussed.
Interferometric Synthetic Aperture Radar (InSAR)land subsidenceCangzhou region
NETL
NSTL
万方数据
维普
