Monitoring and analysis of land settlement in Dangshan County based on ascending and descending InSAR technology
As to the real situation that the land settlement monitoring network in the plain area of Northern Anhui is not perfect,Dangshan County is taken as the study area,and the land settlement information from May 2017 to December 2020 in this area is monitored and obtained by using the heterologous time series InSAR of the ascending and descending.The temporal and spatial development characteristics and the infrastructure stability of railway engineering in this area are analyzed in details.The results show that there is a serious settlement funnel in the monitoring period in the study area,and the settlement rate in its center is more than 60 mm/a,which is mainly concentrated in the urban area.In addition,affected by land settlement,some sections of Longhai Railway and Xulan High-speed Railway have different de-formation diseases,and the maximum settlement rate exceeds 25 mm/a and 12 mm/a respectively,it re-ally needs to pay more attentions.In order to verify the reliability of the obtained settlement information,the correlation analysis of heterogeneous monitoring results of ascending and descending is carried out.By comparison,it is found that the correlation coefficient of the two is 0.95,they are highly consistent.
land settlmentascending and descending InSARSentinel-1ARADARS AT-2
NETL
NSTL
万方数据
