Abstract:Using SBAS-InSAR technology to process the 43-view Sentinel-1A images to obtain the surface deformation of Yan’an New Area(north zone), we decompose the monitoring results with empirical orthogonal function analysis to obtain the time coefficients and spatial distribution of the study area. The results show that the maximum settlement rate of Yan’an New Area(north zone) is -56 mm/a and the maximum uplift rate is 32 mm/a. From the mode 1, the excavation and filling are the main causes of surface uplift and settlement. The mode 2 reflects that different periods of construction correspond to different states of surface deformation, i.e., three stages of acceleration, slowdown, and smoothness.
SUN Yuchao,WEI Changshou,ZHANG Minggang et al. Spatial and Temporal Evolution of Vertical Deformation of the Ground Surface in Yan’an New Area Using Empirical Orthogonal Function[J]. jgg, 2022, 42(8): 813-817.