九寨沟M_S7.0级地震三维同震形变场提取
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摘要
针对D-InSAR地震形变监测中存在LOS(line of sight)视线向模糊的问题,该文构建了一种融合升降轨不同视线向干涉测量数据获取三维同震形变场的方法。以2017年九寨沟M_S7.0级地震为例,基于研究区的Sentine1_1A数据和SRTM(1″)DEM数据,采用二轨差分的D-InSAR技术,融合升降轨LOS向以及自定义视线向的干涉测量数据进行联合解算,获取了研究区三维同震形变场,解决了单一轨道雷达LOS提取结果不能准确反映地表三维形变场的问题。实验表明,此次地震造成了震中附近一定范围地表的沉降和东南向的滑移,并通过震区形变剖面图和形变等值线图,分析了形变场的空间分布以及此次地震所造成地表断裂的位置,认为此次地震与塔藏断裂、虎牙断裂存在关联性,其运动形式为主动盘逆冲的走滑型地震。
According to the problems of line-of-sight LOS(LOS)blurring in D-InSAR seismic deformation monitoring,this paper proposes a new method that acquiring three-dimensional coseismic deformation field from interferometric data with different lines of sight from the elevating rail.By using the two-track differential D-InSAR technique based on the Sentine1_1 Adata and the SRTM(1″)DEM data in the study area,this strategy presents a way of fusing the ascending and descending orbit measurement data from different line of sight to deal with the problem that the LOS extraction results of a single-orbit radar could not accurately reflect the three-dimensional deformation field on the surface.The experiment results show that the earthquake caused a certain range of surface subsidence and southeastward slip near the epicenter.Through the seismic section deformation profile and deformation contour map,the spatial distribution of the deformation field and the surface caused by the earthquake were analyzed.It is considered that the earthquakes are related to the fault of the Tazang and the Huya fault and the motion is in the form of a strike-slip earthquake with active plate thrust.
According to the problems of line-of-sight LOS(LOS)blurring in D-InSAR seismic deformation monitoring,this paper proposes a new method that acquiring three-dimensional coseismic deformation field from interferometric data with different lines of sight from the elevating rail.By using the two-track differential D-InSAR technique based on the Sentine1_1 Adata and the SRTM(1″)DEM data in the study area,this strategy presents a way of fusing the ascending and descending orbit measurement data from different line of sight to deal with the problem that the LOS extraction results of a single-orbit radar could not accurately reflect the three-dimensional deformation field on the surface.The experiment results show that the earthquake caused a certain range of surface subsidence and southeastward slip near the epicenter.Through the seismic section deformation profile and deformation contour map,the spatial distribution of the deformation field and the surface caused by the earthquake were analyzed.It is considered that the earthquakes are related to the fault of the Tazang and the Huya fault and the motion is in the form of a strike-slip earthquake with active plate thrust.
引文
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[9]李勇,邵崇建,李芃宇,等.九寨沟Ms7.0级地震的左旋走滑作用与动力机制[J].成都理工大学学报(自然科学版),2017(6):641-648.(LI Yong,SHAO Chongjian,LI Yengyu,et al.Left-lateral strike-slip effect and dynamic mechanism of the Jiuzhaigou Ms7.0earthquake in the eastern margin of Tibetan plateau,China[J].Journal of Chengdu University of Technology(Science and Technology),2017(6):641-648.)
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[11]SARscape中SAR数据的多视处理[EB/OL].(2016-06-17)[2017-10-30].http:∥blog.sina.com.cn/s/blog_764b1e9d0102xc5x.html.(Multi view processing of SAR data in SARscape[EB/OL].(2016-06-17)[2017-10-30].http:∥blog.sina.com.cn/s/blog_764b1e9d0102xc5x.html.)
[12]胡俊,李志伟,朱建军,等.融合升降轨SAR干涉相位和幅度信息揭示地表三维形变场的研究[J].中国科学:地球科学,2010(3):307-318.(HU Jun,LI Zhiwei,ZHU Jianjun,et al.Study on three-dimensional deformation field of ground surface based on SAR interference phase and amplitude information integrated with orbit[J].China Science,2010(3):307-318.)
[13]郭建强,彭东,曹俊,等.四川九寨沟地貌与第四纪地质[J].四川地质学报,2000(3):183-192.(GUO Jianqiang,PENG Dong,CAO Jun,et al.Geomorphology and quaternary geology in Jiuzhaigou,Sichuan[J].Journal of Sichuan Geology,2000(3):183-192.)
[14]欧阳伦曦,李新情,惠凤鸣,等.哨兵卫星Sentinel-1A数据特性及应用潜力分析[J].极地研究,2017,29(2):286-295.(OUYANG Lunxi, LI Xinqing, HUI Fengming,et al. Analysis of Sentinel-1A data characteristics and its potential application[J].Polar Research,2017,29(2):286-295.)
[15]李映辰,柯樱海,宫辉力,等.DEM对PS-InSAR地面沉降监测的影响研究[J].测绘科学,2018,43(1):1-15.(LI Yingchen,KE Yinghai,GONG Huili,et al.Study on the influence of DEM on the monitoring of PS-InSAR land subsidence[J].Science &Geomatics,2018,43(1):1-15.)
[16]陈俊勇.对SRTM3和GTOPO30地形数据质量的评估[J].武汉大学学报(信息科学版),2005(11):4-7.(CHEN Junyong.Evaluation of topographic data quality of SRTM3and GTOPO30[J].Journal of Wuhan University(Information Science Edition),2005(11):4-7.)
[17]李渝生,黄超,易树健,等.九寨沟7.0级地震的地震断裂及震源破裂的构造动力学机理研究[J].工程地质学报,2017(4):1141-1150.(LI Yusheng,HUANG Chao,YI Shujian,et al.Study on tectonic dynamic mechanism of earthquake rupture and source rupture in Jiuzhaigou Ms 7.0 M[J].Journal of Engineering Geology,2017(4):1141-1150.)
[18]王立伟.基于D-InSAR数据分析的高山峡谷区域滑坡位移识别[D].北京:北京科技大学,2015:1-2.(WANG Liwei.Displacement identification of landslides in alpine canyons based on D-InSAR data analysis[D].Beijing:Beijing University of Science and Technology,2015:1-2.)
[2]刘云华,屈春燕,单新建,等.SAR遥感图像在汶川地震灾害识别中的应用[J].地震学报,2010(2):214-223.(LIU Yunhua,QU Chunyan,SHAN Xinjian,et al.Application of SAR remote sensing images in Wenchuan earthquake disaster identification[J].Journal of Seismology,2010(2):214-223.)
[3]王桂杰,谢谟文,邱骋,等.D-InSAR技术在大范围滑坡监测中的应用[J].岩土力学,2010,31(4):1337-1344.(WANG Guijie,XIE Mowen,QIU Cheng,et al.D-InSAR technology in a wide range of landslide monitoring application[J].Rock and Soil Mechanics,2010,31(4):1337-1344.)
[4]李晖,肖鹏峰,冯学智,等.基于重轨InSAR的积雪深度反演方法[J].冰川冻土,2014(3):517-526.(LI Hui,XIAO Pengfeng,FENG Xuezhi,et al.A snow depth inversion method based on heavy rail InSAR[J].Journal of Glaciology and Geocryology,2014(3):517-526.)
[5]屈春燕,单新建,宋小刚,等.D-InSAR技术应用于汶川地震地表位移场的空间分析[J].地震地质,2010,32(2):175-190.(QU Chunyan,SHAN Xinjian,SONG Xiaogang,et al.Spatial analysis of surface displacement field by D-InSAR technique applied to Wenchuan earthquake[J].Seismic Geology,2010,32(2):175-190.)
[6]陈亮,姚顽强,马润霞,等.应用Sentine1-1A卫星数据对宁东煤炭基地进行沉陷监测试验研究[J].矿山测量,2017(3):45-49.(CHEN Liang,YAO Wanqiang,MA Runxia,et al.Study on subsidence monitoring of Ningdong coal base with Sentine1-1Asatellite data[J].Mining Measurement,2017(3):45-49.)
[7]寇程,柯长青.基于D-InSAR技术的伊朗巴姆地震地表形变监测[J].震灾防御技术,2013(1):72-80.(KOU Cheng,KE Changqing.Surface deformation monitoring of the bam earthquake in iran based on D-InSAR technique[J].Earthquake Disaster Prevention Technology,2013(1):72-80.)
[8]中国地震台网.四川九寨沟地震震中位于三个断裂带附近[EB/OL].(2017-08-11)[2017-10-30].http:∥baijiahao.baidu.com/s?id=1575361698355955&wfr=spider&for=pc.(China Seismological Network.The epicenter of the Jiuzhaigou earthquake in Sichuan is located near the three fault zones[EB/OL].(2017-08-11)[2017-10-30].http:∥baijiahao.baidu.com/s?id=1575361698355955&wfr=spider&for=pc.)
[9]李勇,邵崇建,李芃宇,等.九寨沟Ms7.0级地震的左旋走滑作用与动力机制[J].成都理工大学学报(自然科学版),2017(6):641-648.(LI Yong,SHAO Chongjian,LI Yengyu,et al.Left-lateral strike-slip effect and dynamic mechanism of the Jiuzhaigou Ms7.0earthquake in the eastern margin of Tibetan plateau,China[J].Journal of Chengdu University of Technology(Science and Technology),2017(6):641-648.)
[10]姚鑫,周振凯,李凌婧,等.2017年四川九寨沟Ms7.0地震InSAR同震形变场及发震构造探讨[J].地质力学学报,2017(4):507-514.(YAO Xin,ZHOU Zhenkai,LI Lingjing,et al.Research on coseismic deformation field and seismogenic structure of InSAR Ms7.0earthquake in Jiuzhaigou,Sichuan Province in2017[J].Journal of Geomechanics,2017(4):507-514.)
[11]SARscape中SAR数据的多视处理[EB/OL].(2016-06-17)[2017-10-30].http:∥blog.sina.com.cn/s/blog_764b1e9d0102xc5x.html.(Multi view processing of SAR data in SARscape[EB/OL].(2016-06-17)[2017-10-30].http:∥blog.sina.com.cn/s/blog_764b1e9d0102xc5x.html.)
[12]胡俊,李志伟,朱建军,等.融合升降轨SAR干涉相位和幅度信息揭示地表三维形变场的研究[J].中国科学:地球科学,2010(3):307-318.(HU Jun,LI Zhiwei,ZHU Jianjun,et al.Study on three-dimensional deformation field of ground surface based on SAR interference phase and amplitude information integrated with orbit[J].China Science,2010(3):307-318.)
[13]郭建强,彭东,曹俊,等.四川九寨沟地貌与第四纪地质[J].四川地质学报,2000(3):183-192.(GUO Jianqiang,PENG Dong,CAO Jun,et al.Geomorphology and quaternary geology in Jiuzhaigou,Sichuan[J].Journal of Sichuan Geology,2000(3):183-192.)
[14]欧阳伦曦,李新情,惠凤鸣,等.哨兵卫星Sentinel-1A数据特性及应用潜力分析[J].极地研究,2017,29(2):286-295.(OUYANG Lunxi, LI Xinqing, HUI Fengming,et al. Analysis of Sentinel-1A data characteristics and its potential application[J].Polar Research,2017,29(2):286-295.)
[15]李映辰,柯樱海,宫辉力,等.DEM对PS-InSAR地面沉降监测的影响研究[J].测绘科学,2018,43(1):1-15.(LI Yingchen,KE Yinghai,GONG Huili,et al.Study on the influence of DEM on the monitoring of PS-InSAR land subsidence[J].Science &Geomatics,2018,43(1):1-15.)
[16]陈俊勇.对SRTM3和GTOPO30地形数据质量的评估[J].武汉大学学报(信息科学版),2005(11):4-7.(CHEN Junyong.Evaluation of topographic data quality of SRTM3and GTOPO30[J].Journal of Wuhan University(Information Science Edition),2005(11):4-7.)
[17]李渝生,黄超,易树健,等.九寨沟7.0级地震的地震断裂及震源破裂的构造动力学机理研究[J].工程地质学报,2017(4):1141-1150.(LI Yusheng,HUANG Chao,YI Shujian,et al.Study on tectonic dynamic mechanism of earthquake rupture and source rupture in Jiuzhaigou Ms 7.0 M[J].Journal of Engineering Geology,2017(4):1141-1150.)
[18]王立伟.基于D-InSAR数据分析的高山峡谷区域滑坡位移识别[D].北京:北京科技大学,2015:1-2.(WANG Liwei.Displacement identification of landslides in alpine canyons based on D-InSAR data analysis[D].Beijing:Beijing University of Science and Technology,2015:1-2.)
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