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西藏樟木口岸震后滑坡灾害变形InSAR监测分析

韩冬建 杨成生 董继红

韩冬建, 杨成生, 董继红, 2020. 西藏樟木口岸震后滑坡灾害变形InSAR监测分析. 地质力学学报, 26 (4): 565-574. DOI: 10.12090/j.issn.1006-6616.2020.26.04.049
引用本文: 韩冬建, 杨成生, 董继红, 2020. 西藏樟木口岸震后滑坡灾害变形InSAR监测分析. 地质力学学报, 26 (4): 565-574. DOI: 10.12090/j.issn.1006-6616.2020.26.04.049
HAN Dongjian, YANG Chengsheng, DONG Jihong, 2020. InSAR monitoring and analysis of landslide deformation after the earthquake in the Zhangmu Port, Tibet. Journal of Geomechanics, 26 (4): 565-574. DOI: 10.12090/j.issn.1006-6616.2020.26.04.049
Citation: HAN Dongjian, YANG Chengsheng, DONG Jihong, 2020. InSAR monitoring and analysis of landslide deformation after the earthquake in the Zhangmu Port, Tibet. Journal of Geomechanics, 26 (4): 565-574. DOI: 10.12090/j.issn.1006-6616.2020.26.04.049

西藏樟木口岸震后滑坡灾害变形InSAR监测分析

doi: 10.12090/j.issn.1006-6616.2020.26.04.049
基金项目: 

国家重点研发计划项目 2018YFC1504805

中国地质调查局地质调查项目 DD20190637

中央高校专项基金项目 CHD, 300102269204

陕西省自然科学基金 2019JM-245

详细信息
    作者简介:

    韩冬建(1994-), 男, 在读硕士, 主要研究InSAR技术在地质灾害的应用。E-mail:18710742639@163.com

    通讯作者:

    杨成生(1982-), 男, 教授, 主要研究InSAR技术理论及高精度地质灾害调查与监测。E-mail:ycsgps@163.com

  • 中图分类号: P642.22

InSAR monitoring and analysis of landslide deformation after the earthquake in the Zhangmu Port, Tibet

  • 摘要: 位于中国和尼泊尔边境的西藏樟木口岸是国家一类陆路通商口岸,也是西藏最大的边贸中心口岸。2015年尼泊尔大地震之后,西藏樟木口岸因多次发生滑坡灾害,而导致口岸关闭。为了调查樟木口岸区域滑坡灾害的分布和变形情况及更好的服务于区域减灾防灾,利用InSAR技术对覆盖该区域的Sentinel-1A和ALOS-2两种卫星影像数据进行了处理,并通过分析视线向年均形变速率图,圈定了17处疑似滑坡,并对其中的5处典型滑坡进行时间序列形变特征分析,监测识别出的滑坡基本沿318国道所在一侧的波曲河左岸分布。InSAR调查结果表明受地震影响樟木地区的滑坡多分布在沿波曲河左岸的陡峭山体上,中尼公路迪斯岗至友谊桥段的古滑坡出现了局部复活的现象,同时樟木镇居民所在的城区也发育有扎美拉山危岩体崩塌滑坡灾害。

     

  • 图  1  西藏樟木镇震后灾害发育

    a—樟木镇概况;b—4.25尼泊尔地震震中位置;c—扎美拉山崩塌;d—迪斯岗至友谊桥段

    Figure  1.  Map and photos of post-earthquake disaster development in Zhangmu, Tibet

    图  2  小基线干涉图集技术流程图

    Figure  2.  Technical flowchart of the small baseline interference atlas

    图  3  樟木口岸Sentinel-1A视线向年均形变速率图

    Figure  3.  Map of annual average rate of line-of-sight deformation of Sentinel-1A in the Zhangmu port

    图  4  典型滑坡遥感影像及InSAR结果

    a—3#滑坡;b—3#滑坡年均形变速率;c—8#滑坡;d—8#滑坡年均形变速率

    Figure  4.  Remote sensing images of typical landslides and the InSAR results

    图  5  樟木口岸ALOS-2数据视线向年均形变速率图

    Figure  5.  Map of annual average rate of line-of-sight deformation of ALOS-2 data in the Zhangmu port

    图  6  ALOS-2结果中典型滑坡

    a—3#和4#滑坡;b—9#滑坡;c—4#滑坡年均形变速率;d—3#滑坡年均形变速率;e—9#滑坡年均形变速率

    Figure  6.  Typical landslides from the ALOS-2 results

    图  7  典型滑坡体形变时间序列(ALOS-2数据)

    a—4#滑坡时间序列形变;b—4#滑坡年均形变速率;c—9#滑坡时间序列形变;d—9#滑坡年均形变速率

    Figure  7.  Time series deformation of typical landslides(ALOS-2 data)

    表  1  SAR数据集的基本参数

    Table  1.   Basic parameters of the SAR datasets

    SAR传感器 Sentinel-1A ALOS-2
    轨道 121 157
    轨道方向 Descending Ascending
    入射角/(°) 39.276 40.560
    方位角/(°) -169.936 -10.096
    分辨率/(方位向m×距离向m) 13.969×2.329 3.256×4.290
    影像数量 51 20
    获取时间/yyyymmdd 20170413~20181228 20150627~20191012
    下载: 导出CSV
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  • 收稿日期:  2020-05-11
  • 修回日期:  2020-06-30
  • 刊出日期:  2020-08-28

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