Surface Deformation Monitoring Of Golmud And Surrounding Areas Using The Temporal InSAR Technique

Golmud,located in the hinterland of the Qinghai-Tibet plateau,is backed by the Kunlun mountains and is an important node of the qinghai-tibet highway and railway.Affected by complex topography and active tectonic movement,geological disasters are frequent in the peripheral areas of golmud city.IPTA technology,as a new time-series InSAR technology,is more advantageous than the traditional ps-insar technology in surface deformation extraction in plateau areas and preliminary detection of geological disasters,which is of great significance in preventing and controlling land subsidence disasters in practical applications.The main research contents are as follows:(1)using the SAR image data of sentinel 1 satellite,and based on the IPTA method to monitor the surface deformation of golmud city and its surrounding areas located on the plateau,discuss and analyze the urban deformation of golmud city as a whole and the ground water that mainly causes the urban surface subsidence;(2)using the SAR image data of sentinel 1 satellite,the surface deformation monitoring of kunlun mountain national geopark area was carried out with the IPTA method,and the coherent points along the Qinghai-Tibet railway and Qinghai-Tibet highway were extracted for separate analysis and discussion;(3)the time series of deformation and displacement of the geermu river bridge and geermu railway station,important urban infrastructure in geermu city,were extracted using the time-series InSAR technology,and their deformation was monitored and analyzed.(4)according to the changes of national geological park area along qinghai-tibet railway to extract the deformation time series,separation of linear deformation and nonlinear deformation part(cyclic deformation),and analysis of the overall distribution of linear deformation and movement tendency and the connection between the local landform and geological activity,and nonlinear deformation if there is a seasonal changes associated with frozen soil or ground water,through mathematical models to analyze the characteristics of deformation and explore possible causes deformation occurs,for the area of possible geological disaster prevention and control work to provide the foundational deformation data.