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基于高分影像与InSAR解译的西藏林芝则隆弄高位链式地质灾害发育特征分析

李军 褚宏亮 李滨 高杨 王猛 赵超英 刘晓杰

李军, 褚宏亮, 李滨, 高杨, 王猛, 赵超英, 刘晓杰. 2021: 基于高分影像与InSAR解译的西藏林芝则隆弄高位链式地质灾害发育特征分析. 中国地质灾害与防治学报, 32(3): 42-50. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-06
引用本文: 李军, 褚宏亮, 李滨, 高杨, 王猛, 赵超英, 刘晓杰. 2021: 基于高分影像与InSAR解译的西藏林芝则隆弄高位链式地质灾害发育特征分析. 中国地质灾害与防治学报, 32(3): 42-50. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-06
Jun LI, Hongliang CHU, Bin LI, Yang GAO, Meng WANG, Chaoying ZHAO, Xiaojie LIU. 2021: Analysis of development characteristics of high-elevationchain geological hazard in Zelongnong, Nyingchi, Tibet based on high resolution image and InSAR interpretation. The Chinese Journal of Geological Hazard and Control, 32(3): 42-50. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-06
Citation: Jun LI, Hongliang CHU, Bin LI, Yang GAO, Meng WANG, Chaoying ZHAO, Xiaojie LIU. 2021: Analysis of development characteristics of high-elevationchain geological hazard in Zelongnong, Nyingchi, Tibet based on high resolution image and InSAR interpretation. The Chinese Journal of Geological Hazard and Control, 32(3): 42-50. doi: 10.16031/j.cnki.issn.1003-8035.2021.03-06

基于高分影像与InSAR解译的西藏林芝则隆弄高位链式地质灾害发育特征分析

doi: 10.16031/j.cnki.issn.1003-8035.2021.03-06
基金项目: 中国地质调查局地质调查项目(DD20211540);基于InSAR与高分影像的高位冰崩、滑坡、崩塌灾害预判研究(藏财采【2020】0546)
详细信息
    作者简介:

    李军:李 军(1990-),男,博士研究生,主要从事工程地质与地质灾害研究。E-mail:ljedu@foxmail.com

    通讯作者:

    褚宏亮(1981-),男,硕士,高级工程师,主要从事地质灾害防灾减灾研究。E-mail:52572706@qq.com

  • 中图分类号: P642

Analysis of development characteristics of high-elevationchain geological hazard in Zelongnong, Nyingchi, Tibet based on high resolution image and InSAR interpretation

  • 摘要: 则隆弄沟位于西藏林芝米林县雅鲁藏布江右岸,属于震后影响区,因沟内地形陡峻、物源充足以及水源充沛,1950—2020年期间沟内高位地质灾害活动频繁,沟口村庄和桥梁长期遭受其严重威胁。根据现场调查与无人机航拍,结合多期遥感影像和InSAR数据,对则隆弄沟形成区高风险物源类别、数量以及流通区、堆积区的松散堆积物运动堆积特征进行解译,结果显示:目前则隆弄沟内形成区与流通区陡缓坡交界区域多级多期堆积有大量冰碛物松散物源,流动性较强,区域地质条件、地震活动、气象水文等因素为则隆弄高位链式地质灾害发生提供不稳定的物源结构、良好的临空条件和储藏平台、充足的势动能转换条件以及水动力条件。总结出则隆弄高位地质灾害链形成及演化过程为:高位冰崩(岩崩)-碎屑流-泥石流-堵江堰塞坝(湖)-洪水灾害,其长期具备高易发性和高危险性,后期应加强则隆弄沟高位地质灾害链的监测预警与风险防控。
  • 图  1  直白大桥受损特征(拍摄于2020年10月)

    Figure  1.  Damage characteristics of Zhibai bridge

    图  2  则隆弄高位地质灾害链分区及无人机航空影像图

    Figure  2.  Zoning of high-level geological disaster chain and aerial image of UAV in Zelongnong gully

    图  3  则隆弄沟2016年6月15日至2018年3月7日雷达二维形变

    Figure  3.  Two-dimensional deformation of radar in Zelongnong gully from June 15, 2016 to March 7, 2018

    图  4  则隆弄沟形成区潜在高风险物源分布图

    Figure  4.  Distribution of potential high-risk sources of formation area in Zelongnong gully

    图  5  潜在高风险物源遥感解译图

    Figure  5.  Remote sensing interpretation picture of potential high-risk sources

    图  6  则隆弄沟多期遥感影像对比图

    Figure  6.  Comparison picture of multi-phase remote sensing images of Zelongnong Gully

    图  7  堆积区特征(拍摄于2020年10月)

    Figure  7.  Characteristics of accumulation area

    图  8  则隆弄沟(北沟)剖面图

    Figure  8.  Section of Zelongnong gully

    表  1  则隆弄沟基本特征

    Table  1.   Basic characteristics of the Zelongnong Gully

    分区面积/km2沟长/km高程范围/m高差/m纵坡降/‰
    形成区31.035.954000~77823782468
    流通区4.734.543000~40001000201
    堆积区0.631.082840~3000160153
    下载: 导出CSV

    表  2  形成区潜在高风险物源类型及参数

    Table  2.   Types and parameters of potential high risk sources in the formation area

    形成区高风险
    物源类型
    分布位置数量/处
    (编号范围)
    最小物源编号
    (面积/km2
    最大物源编号
    (面积/km2
    总面积/km2最低位物源分布
    高程范围/m
    最高位物源分布
    高程范围/m
    冰崩体则隆弄沟后缘的南侧壁6(B1-B6)B6块体(0.034)B2块体(0.26)0.64914~52356023~6522
    岩崩体则隆弄沟后缘的南侧壁13(Y1-Y13)Y6块体(0.021)Y7块体(0.17)0.964615~48996775~7051
    冰碛物松散堆积体主沟(南沟)和支沟(北沟)沟底区域2(BQ1-BQ2)BQ02(1.42)BQ01(2.85)4.273815~40004896~4988
    下载: 导出CSV
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  • 收稿日期:  2021-05-21
  • 修回日期:  2021-05-25
  • 刊出日期:  2021-06-25

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