Recognition For Potential Landslides In Huidong County Based On InSAR And Optical Remote Sensing

Chinese complex geological conditions and frequent landslide disasters have caused huge losses to people's property and life safety.It is of great significance to explore more effective landslide investigation,monitoring,and prevention and control models.Nowadays,InSAR technology and optical remote sensing technology are widely used in the recognition for potential landslides.Compared with the traditional manual survey method,it has the advantages of wide identification range,high efficiency and low cost.However,due to factors such as climate,topography,and surface vegetation,the InSAR technology or optical remote sensing technology alone is used to identify the limitations of potential landslides,and the recognition results are not comprehensive.Therefore,this paper takes Huidong County,Sichuan Province as an example,and simultaneously uses InSAR technology and optical remote sensing technology to identify potential landslides.The main research contents and results are as follows:(1)Based on InSAR technology,identify potential landslides in Huidong County.Using Sentinel-1A data,combined with D-InSAR and Stacking InSAR technology,the average surface deformation of Huidong County from 2017 to 2019 was obtained.After delineating the area where the absolute value of the deformation variable is greater than0.01m/a,after excluding the deformation caused by surface movement such as surface subsidence,collapse and physical weathering,the potential landslides in Huidong County is identified.(2)Based on optical remote sensing technology,identify potential landslides in Huidong County.Combining the geological conditions,topography and topography of the study area and other disaster-pregnant background data,according to the landslide hazard background and formation conditions,establish landslide remote sensing identification signs.Based on GF-1 satellite remote sensing images,combined with Google Earth images,optical remote sensing technology was used to identify potential landslides in Huidong County.(3)Analysis of the development law of landslide potential dangers in Huidong County.Determine the geographic location,boundary,and threat objects of landslide hazards in Huidong County,and compile the distribution map of landslide hazards in Huidong County.It analyzes its development law from the dimensions of topography,engineering rock formation,geological structure and human engineering activities.