Application of PS-InSAR technology in surface settlement monitoring in Zhengzhou and its accuracy
Surface deformation is one of the main disasters faced by urban geology in China.this paper uses the PS-InSAR technology to obtain the spatial-temporal distribution information of surface subsidence in the urban area of Zhengzhou,and evaluates the accuracy of the obtained deformation variables.The results show that during the study period(2021.01～2021.12),the uneven settlement phenomenon occurred in the urban area of Zhengzhou as a whole,with the maximum settlement of-19.8mm and the maximum uplift of 15.5mm;The results of land subsidence retrieved by PS-InSAR technology in Zhengzhou are in good agreement with the results of artificial leveling.The maximum deviation between the results of PS-InSAR technology and the results of artificial leveling is 4.05mm,the minimum deviation is 0.15mm,and the STD and RMS values are 1.92mm and 2.24mm,respectively.This further confirms that the urban land subsidence retrieved by PS-InSAR technology is characterized by large area,all-weather and high efficiency.The surface monitoring results can provide reference for the management department to control the ground subsidence disaster.
万方数据
维普
