SURFACE MOTION STUDY ALONG THE MARITIME SILK ROAD BASED ON C-BAND SAR OBSERVATION

摘要

Land subsidence is caused by consolidation or compression of underground soft soil under the action of natural or man-made factors, resulting in vertical deformation of ground in a certain area, which will become a kind of geological disaster in serious condition. Monitoring of surface motion including subsidence can not only avoid property loss caused by major accidents, but also conducive to the sustainable development of the economy and society. According to the wide coverage demand of subsidence monitoring, time series InSAR technique has been introduced into studying the surface motion trend along the maritime silk road in China. In this study, we take advantage of C-band SAR Sentinel-1A images to implement multi-temporal InSAR analysis at two study sites, namely, Hong Kong International Airport and Shantou. Subsidence patterns have been analyzed at these two sites. Several typical abnormal settlements have been detected and the triggering factor of the subsidence is clarified according to relative research.