联合GNSS和InSAR地灾区纯净形变场解算研究  

Research on Pure Deformation Field Calculation Method Based on GNSS and InSAR

作　　者：杨凯钧 雷帆 曹里[1,2,3] 唐伟 张哲 YANG Kaijun;LEI Fan;CAO Li;TANG Wei;ZHANG Zhe(China University of Geosciences(Wuhan),Wuhan 430078,China;The Second Surveying and Mapping Institute of Hunan Province,Changsha 410029,China;Key Laboratory of Natural Resources Monitoring and Supervision in Southern Hilly Region,Ministry of Natural Resources,Changsha 410029,China;China University of Mining and Technology(Beijing),School of Geosciences and Surveying and Mapping Engineering,Beijing 100083,China)

机构地区：[1]中国地质大学(武汉),湖北武汉430078 [2]湖南省第二测绘院,湖南长沙410029 [3]自然资源部南方丘陵区自然资源监测监管重点实验室,湖南长沙410029 [4]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《地理空间信息》2024年第6期113-117,共5页Geospatial Information

基　　金：湖南省自然资源厅科技计划项目(2023-55);2024年度湖南省自然科学基金资助项目(2024JJ8342)。

摘　　要：以湖南省麻阳县地质灾害易发区为实验区,通过多个GNSS基岩站长时间序列解算结果显示,区域整体地壳板块垂向形变量在3.39~4.85 mm,显示整体抬升趋势;通过InSAR长时间序列解算结果显示,整体地表绝对垂向形变量在-41~31 mm,显示整体沉降,局部抬升趋势。本文通过实验证明了在地质灾害研究区基岩GNSS站和InSAR两种技术手段监测结果存在较大的差异,判定其差异原因为基岩板块运动和裸露地表绝对运动之间的差异,随后分别对GNSS基岩观测和InSAR地表观测结果进行全域空间差值拟合后求差,得到区域纯净形变场为-34.46~34.89 mm,本文形成的区域纯净形变场解算方法,能够真实反映地灾区地表滑动,避免造成对滑坡隐患趋势的误判。Taking the geological disaster prone area of Mayang County of Hunan Province as the test area,the results of GNSS station time series calculation show that the vertical shape variable of the regional overall crustal plate ranges from 3.39 mm to 4.85 mm,indicating the overall up-ward trend.The results of InSAR long time series calculation show that the absolute vertical shape variable of whole surface ranges from-41 mm to 31 mm,indicating the overall subsidence and local uplift trend.In this paper,we proved that the monitoring results of two technical means were quite different through experiments.The key factor is the difference between the bedrock plate movement and the absolute movement of ex-posed surface.Then,we calculated the difference to obtain the relative shape variable of exposed surface movement compared with the bedrock.The regional pure settlement field was-34.46~34.89 mm.The method proposed in this paper can truly reflect the surface sliding in the disaster ar-ea,and avoid the misjudgment of landslide hidden danger trend.

关 键 词：GNSS 时间序列 INSAR 形变场 

分 类 号：P228[天文地球—大地测量学与测量工程]