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基于In SAR技术天山乌吐劲河谷同震形变遥感研究 预览

Research on coseismic deformation in Ukraine River Valley of Tianshan Mountains based on InSAR technology
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摘要 基于ALOS/PALSAR雷达卫星影像,采用合成孔径雷达干涉测量(interferometric synthetic aperture Radar,InSAR)技术,重建地震形变前后的数字高程模型(digital elevation model,DEM),经RTK校验后利用差值算法反演天山乌吐劲河谷地震同震场形变特征。研究结果表明:①去尖三角状崩塌形变面积为104. 47万m2,崩塌量为1 461. 60万m~3,起始端高程为3 225 m,平均坡度为48°,坡向为NNW;②喇叭状堆积形变面积为78. 61万m~2,堆积量为1 424. 27万m~3,掩埋深度为35~80 m;③河道南岸堆积形变将河床向北推进了100 m、向东推进了300 m;④崩塌形变阻塞河道后导致水体形变,形成堰塞湖水面面积在30 d内由原有的0. 039 km~2增大至0. 059 km~2,并在2010年湖面面积出现峰值0. 146 km~2;⑤形变原因不仅是由于其处在地震活动带上,还有石灰岩岩性、地形坡度和断裂构造等综合因素作用的结果。 In this paper,the authors studied the coseismic deformation in Ukraine River valley in Tianshan Mountains,and reconstructed digital elevation modle(DEM)graph of 12.5 m spatial resolution for the study area before and after the earthquake using the ALOS/PALSAR data by InSAR remote sensing technique.Then the authors obtained the remote sensing characteristics of seismic collapse of earthquake by difference method of the DEM after the field verification by RTK calibration.The results show that:①The area of the collapse of the triangle is 104.47 million m2,the collapse is 1 416.60 million m3,the starting elevation is 3 225 m,the average slope is 48°,and slope direction is NNW.②The trumpet-shaped accumulation body area is 78.61 million m2,the accumulation is 1 424.27 million m3,and the buried depth is between 35 m and 80 m.③The river bed was pushed northward by 100 m,and the eastward advance reached 300 m,due to the accumulation body of the south of the river channel.④Collapse of the body led to the the formation of quake river.The surface area of the lake increased from 0.039 km2 to 0.059 km2 within 30 days and the lake area reached the peak of 0.146 km2 in 2010.⑤The factors responsible for the collapse included not only seismic activity but also limestone lithology,terrain slope,fault structure and other comprehensive factors.
作者 汪东 来风兵 陈孟禹 陈蜀江 黄铁成 贾翔 WANG Dong;LAI Fengbing;CHEN Mengyu;CHEN Shujiang;HUANG Tiecheng;JIA Xiang(College of Geographical Science and Tourism,Xinjiang Normal University,Urumqi 830054,China;Urumqi Institute of Spatial Remote Sensing Applications,Urumqi 830025,China;School of Foreign Languages,Suzhou University of Science and Technology,Suzhou 215009,China)
出处 《国土资源遥感》 CSCD 北大核心 2019年第1期187-194,共8页 Remote Sensing for Land & Resources
基金 国家自然科学基金项目“塔克拉玛干西部别里库姆沙漠胡扬沙堆发育模式及其在荒漠监测中的作用”(编号:41661002) 新疆干旱区湖泊环境与资源重点实验室开放基金项目“塔克拉玛干西部别里库姆沙漠胡扬沙堆发育机制研究”(编号:XJDX0909-2015-04)共同资助。
关键词 INSAR 同震形变 天山 遥感 堰塞湖 InSAR coseismic deformation Tianshan Mountains remote sensing dammed lake
作者简介 第一作者:汪东(1993-),男,硕士研究生,主要研究方向为资源环境遥感和空间信息提取。Email:wang_d1209@163.com;通信作者:来风兵(1977-),男,副教授,主要研究方向为干旱区资源与环境遥感。Email:laifengbing@163.com。
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