An Applied Research Of Monitoring Of Land Subsidence In Zhengzhou City Based On InSAR

Ground subsidence can cause serious geological hazards,whether it is real-time or slow.Ground surface settlement destroy the roads,buildings,underground pipelines and other construction persistently.Many cities in China have suffered varying degrees of economic losses.ZhengZhou,which is located in China's Central Plains region,has several geological changes around the belt.Therefore,it is important to observe the ground subsidence,not only having guiding significance for the city planning,but also can carry out assessment and prevention of the ground subsidence.InSAR is a good substitute for the original level and GPS measurement technology in ground subsidence monitoring.It has a good solution to the original method's shortcomings of less sampling points and longer monitoring time.This method has advantages including large-scale monitoring,efficient processing and high precision.At present,the use of InSAR technology to monitor urban land subsidence has become one of the main methodsThis paper introduces the InSAR principle in detail and Highlighted introduces the PS-InSAR.Then,conducting a very in-depth discussionof using it in the ground subsidence monitoring in ZhengZhou,and innovatively verify the accuracy of InSAR monitoring results by GPS and leveling results.The main content has the following aspects:(1)Researching on Ground Monitoring Method Based on InSAR,and comparatively analysis the InSAR ground subsidence monitoring methods.(2)Intercept the processed TerraSAR-X data,extractthe information of the development and change of ground subsidence during the year of Zhengzhou urban area.(3)Innovatively verify the accuracy of InSAR monitoring results by GPS and leveling results,and evaluate the accuracy of InSAR ground subsidence monitoring.