Identification of Geological Hazards and Analysis of Deformation Characteristics in the Altun Mountain Area of Ruoqiang County Based on SBAS-InSAR and Optical Remote Sensing Technology
The location of the Altun Mountains is a bridgehead and strategic location for a new round of mineral explo-ration strategies.It is known for its complex geographical environment and unique geological structure,which has led to it being an important area for the development of geological disasters such as landslides,mudslides,etc.in Xinjiang.This article takes the Altun Mountain area of Ruoqiang County as the research area,and conducts a comprehensive re-mote sensing technology combining SBAS InSAR with high-precision optical remote sensing to identify geological haz-ards and analyze deformation in the research area.Based on Sentinel-lA InSAR data and"AW3D30"DEM auxiliary da-ta,the SBAS InSAR method was used to obtain the surface deformation of hidden danger points in the study area,sup-plemented by GF-1 and GF-2 high-resolution optical remote sensing,to identify geological hazards and analyze deforma-tion in the study area.The understanding obtained is as follows:(1)Using Sentinel-1A data for InSAR deformation inver-sion,combined with comprehensive remote sensing identification and field verification,146 geological hazard hazards were identified with an accuracy rate of 75％.The method is applicable,and the comprehensive remote sensing method combining InSAR with optical remote sensing can serve as a new technological means for geological disaster prevention,monitoring,and other aspects in the region.(2)More than 80％of the identified geological hazards involve slope cutting and road construction,with two locations located in mining areas.Therefore,it is analyzed that human engineering activi-ties are prone to slope instability or triggering debris flow disasters,and it is necessary to strengthen continuous monitor-ing of such geological hazards.(3)Generally,landslides have obvious deformation and morphological characteristics in their images,which correspond well with the results of field verification.However,there are still a considerable number of InSAR deformation points whose deformation characteristics are not obvious in the field.In addition,some hidden danger points are located in high hidden areas of slopes that are difficult for personnel to reach.Therefore,more detailed investigation and verification are needed,and comprehensive monitoring and investigation methods such as drones,Li-DAR,and ground equipment can be applied.(4)InSAR technology is mainly used to monitor slow and small deforma-tions,and has good effects on disasters such as ground collapse and landslides.However,it has certain limitations in monitoring sudden disasters(such as frequent landslides in the study area of this project).In addition,high-resolution SAR data can be collected,which has a good monitoring effect on small and medium-sized disasters.
Geological hazardsSBAS InSARRemote sensingHazard identificationAnalysis of deformation char-acteristics
NETL
NSTL
万方数据
