基于InSAR技术对汕头潮阳区地质灾害体识别分析

IDENTIFICATION AND ANALYSIS OF GEOLOGICAL HAZARD BODY IN CHAOYANG DISTRICT,SHANTOU CITY BY USING INSAR TECHNOLOGY

基于星载差分干涉D-InSAR与SBAS-InSAR的技术优势,实现潮阳区多种变形状态潜在地质灾害体识别。选用研究区(2017年1月至2022年8月)共168景Sentinel-1升轨影像,根据不同监测手段的特点,综合多种InSAR监测手段,应用SBAS-InSAR与D-InSAR相结合的方法,查明区域内全部疑似地质灾害隐患点空间地理信息、周边建筑物现状特征、形变量、形变面积、形变趋势等参数;总结地质灾害疑似隐患点特征、两年内形变趋势、形变面积、累积形变量、边界、强度等信息。为地质灾害风险调查评价提供依据。

Based on the technical advantages of satellite-borne differential interferometry D-InSAR and SBAS-InSAR,the potential geological hazards of various deformation states in Chaoyang area are identified.A total of 168 Sentinel-1 ascending orbit images were selected from the study area(from January 2017 to August 2022).According to the characteristics of different monitoring methods,and combining SBAS-InSAR with D-InSAR,the spatial geographic information of all suspected geological hazard points in the region,and the parameters,such as the status characteristics,shape variables,deformation area,and deformation trend,of surrounding buildings were identified.The characteristics of suspected hidden danger points,deformation trend in two years,deformation area,cumulative shape variable,boundary,intensity and other information of geological disasters were summarized.The research results provide a basis for geological hazard risk investigation and evaluation.