测绘通报 ›› 2023, Vol. 0 ›› Issue (5): 9-15.doi: 10.13474/j.cnki.11-2246.2023.0128

• 滑坡监测与分析 • 上一篇    下一篇

九寨沟地区高位滑坡隐患InSAR-LiDAR早期识别

王之栋1,2, 唐伟2, 马志刚1, 李雨宸3, 杨本勇2, 李维庆2, 李永鑫2   

  1. 1. 四川省国土空间生态修复与地质灾害防治研究院, 四川 成都 610036;
    2. 自然资源部第三地理信息制图院, 四川 成都 610100;
    3. 西南财经大学天府学院, 四川 成都 610066
  • 收稿日期:2022-07-14 修回日期:2023-03-20 发布日期:2023-05-31
  • 通讯作者: 唐伟。E-mail:362706358@qq.com
  • 作者简介:王之栋(1993-),男,硕士,工程师,研究方向为InSAR数据处理与分析应用。E-mail:zdwang_gis@foxmail.com
  • 基金资助:
    四川省地质灾害隐患遥感识别监测项目(510201202110324);自然资源技术融合研究与应用示范项目(121204007000204101);四川省地质灾害隐患遥感识别监测(2022年)及高分遥感应用服务项目(N5100012022001470)

Early identification of ridge-top landslide hazards in Jiuzhaigou area using InSAR-LiDAR method

WANG Zhidong1,2, TANG Wei2, MA Zhigang1, LI Yuchen3, YANG Benyong2, LI Weiqing2, LI Yongxin2   

  1. 1. Sichuan Academy of Territorial Space Ecorestoration and Geohazard Prevention, Chengdu 610036, China;
    2. The Third Geoinformation Mapping Institute of Ministry of Natural Resources, Chengdu 610100, China;
    3. Tianfu College, Southwestern University of Finance and Economics, Chengdu 610066, China
  • Received:2022-07-14 Revised:2023-03-20 Published:2023-05-31

摘要: 首先在九寨沟地区约4000 km2的范围实践了空-天-地一体化的合成孔径雷达干涉测量技术(InSAR)和激光探测及测距技术(LiDAR)的滑坡隐患识别方法,共识别出滑坡隐患344处,其中高位滑坡隐患114处,其形变速率为-149~120 mm/a。然后综合遥感和野外调查验证分析,可知九寨沟地区高位滑坡隐患主要分布在构造侵蚀高山河谷地貌、坡度35°~45°、坡向NE至SE范围、高差100~350 m的第四系(Q)松散堆积层中。最后以中查沟高位滑坡隐患为例进行了基于InSAR-LiDAR方法的高位滑坡隐患时空分析,得到了该高位滑坡隐患的形变、形态和形势特征。本文验证了综合利用InSAR、LiDAR技术识别和分析高位滑坡隐患的准确性和可靠性,可为滑坡隐患的防灾减灾提供科学依据和参考。

关键词: 九寨沟, 高位滑坡隐患, 早期识别, InSAR, LiDAR, 发育特征

Abstract: In the area of about 4000 km2 in Jiuzhaigou area, synthetic aperture radar interferometry (InSAR) and light detection and ranging (LiDAR) are applied to identification of landslide hazards. A total of 344 landslide hazards are identified, including 114 ridge-top landslide hazards, with a deformation rate of -149~120 mm/a during December 2017 and October 2020.Through comprehensive remote sensing and field investigation, it is concluded that most of ridge-top landslide tend to develop in the NE, SE-faced slope with a gradient of 35°~45°. The most elevation difference of ridge-top landslide range from 100 m to 350 m. The slope material is mostly composed of quaternary (Q) unconsolidated deposit with geomorphology of high mountains and valleys eroded by tectonics. Finally, Taking the Zhongchagou ridge-top landslide as an example, the temporal and spatial analysis of the ridge-top landslide based on InSAR-LiDAR method is carried out, and the deformation, shape and situation characteristics of the ridge-top landslide are obtained. This study verified the accuracy and reliability of the comprehensive use of InSAR and LiDAR technology to identify and analyze ridge-top landslide hazards, which can provide scientific basis and reference for disaster prevention and mitigation of landslide hazards.

Key words: Jiuzhaigou, ridge-top landslide hazards, early identification, InSAR, LiDAR, developmental characteristics

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