阿尼玛卿冰川表面流速与地质灾害隐患点监测  

Monitoring glacier velocity and the potential geological hazards of A’nyemaqen glacier

作　　者：苗朝霞 白林 李振洪 王龙燕[1,2,3] 阿裕林 MIAO Zhaoxia;BAI Lin;LI Zhenhong;WANG Longyan;A Yulin(College of Geological Engineering and Geomatics,Chang’an University,Xi’an 710054,China;Key Laboratory of Western China’s Mineral Resource and Geological Engineering,Ministry of Education,Xi’an 710054,China;Big Data Center of Geosciences and Satellite,Chang’an University,Xi’an 710054,China;Qinghai Academy of Surveying and Mapping Science and Technology,Xining 810001,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]西部矿产资源与地质工程教育部重点实验室,西安710054 [3]长安大学地学与卫星大数据研究中心,西安710054 [4]青海省测绘科学技术研究院,西宁810001

出　　处：《测绘科学》2022年第8期240-246,254,共8页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42004005);国家重点研发计划项目(2019YFC1509201);陕西省科技创新团队项目(2021TD-51);陕西省自然科学基础研究计划资助项目(2020JQ-357)

摘　　要：为了更好地开展冰川变化与地质灾害隐患的监测研究,该文基于Sentinel-1A数据,使用合成孔径雷达影像偏移量追踪技术和GACOS辅助下的小基线集-InSAR方法,对阿尼玛卿冰川表面流速及周边区域地质灾害隐患点进行了监测分析。结果表明:2015—2021年阿尼玛卿冰川表面流速先增加后减缓,在2018年达到了最大(6 m/a);冰川流速暖季(5—9月)大于冷季(10月—次年4月);地质灾害隐患点多集中于冰川两侧,其形变速率与冰川运动速率一致性较好,推测与冰川融水对岩土体稳定性的影响有关。该文的研究结果可为冰川融化引起的地质灾害的防灾减灾工作提供重要参考。In order to carry out monitoring research on the glacier change and geological disasters,two Sentinel-1 A datasets were used to monitor the surface velocity of A’nyemaqen glacier and the potential points of geological hazards in the surrounding areas with synthetic aperture radar offset-tracking and GACOS-assisted small baseline subset-InSAR in this paper.The results showed that the surface velocity of glacial increased from 2015 to 2018 and then decreased from 2018 to 2021,the maximum velocity reached 6 m/a in 2018.The velocity in the warm season(from May to September)was higher than that in the cold season(from October to April of the next year).Most of the potential points of geological hazards were located on both sides of the glacier,whose deformation rates showed good agreement with the glacial surface velocity.The most likely reason was that the meltwater from the glacier reduces the stability of rock and soil mass.The study was meaningful for the prevention and reduction of geological disasters caused by glaciers melting.

关 键 词：冰川表面流速 地质灾害 偏移量追踪技术 小基线集方法 阿尼玛卿冰川 

分 类 号：P694[天文地球—地质学] P237