Land Subsidence Monitoring in Kunshan City Based on IPTA and SBAS Technology
The rapid development of society has caused varying degrees of land subsidence to many cities,and causes great economic losses and harm to these cities.It is necessary to monitor ground subsidence,to find out subsidence distribution,and to provide data support for government decision-making.InSAR technology is an all-day,all-weather monitoring method,which has great advantages for carrying out ground subsidence monitoring.Using 16 scenes RADARSAT-2 image data covering Kunshan city,and uses IPTA technology and SBAS technology to extract the subsidence information respectively.The two sets of land subsidence results in Kunshan city are obtained,and the two sets of results are mutually verified.The results show that the subsidence distribution obtained by the two methods is consistent,but there are slight differences in the specific values of the subsidence amount.From the cumulative subsidence map,it can be found that the difference between the maximum cumulative ground subsidence obtained by the two methods from 2016-9-21 to 2018-7-25 in Kunshan city is about 5 mm.
NETL
NSTL
万方数据
