Subsidence analysis for dynamic groundwater monitoring based on improved SBAS-InSAR methods
With the development of human society,the problems of ground subsidence and over-exploitation of groundw-ater resources are becoming increasingly serious.In order to analyse the relationship between changes in groundwater dynamics and ground subsidence,surface deformation and changes in groundwater dynamics were monitored through the improved small-baseline-set radar interferometry technique and satellite data of the Gravity Inversion and Climate Experiment,respective-ly,and the relationship between the two was finally analyzed.The results show that the maximum value of equivalent water height of GRACE groundwater storage is 50 mm and the minimum value is-80 mm,the maximum value of average ground subsidence is 0mm and the minimum value is-4.8,the trend of changes in groundwater storage and the trend of changes in ground subsidence are basically the same,and there is a correlation between the dynamic changes of ground subsidence and groundwater.The results of the study are instructive for the prevention and control of ground subsidence.
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