通过结合卫星和地面的InSAR来描述地震引起的达贡巴奥山体滑坡的表面变形
Xiaomeng Wang1, Wenjun Zhang1,2, Jialun Cai1,2
1School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China.
Sensors (Basel, Switzerland)
|January 11, 2025
概括
达贡巴奥山滑坡显示正在进行的变形,卫星和地面InSAR显示表面运动高达80.9毫米/年. 的地形和地质是这种罕见的超级巨大的山体滑坡演变的关键因素.
科学领域:
- 地质科学 地质科学
- 地球观测 地球观测
- 地理危险 地区性危险
背景情况:
- 达贡巴奥山体滑坡 (Daguangbao landslide,DGBL) 是2008年温川地震引发的一场罕见的超级巨型山体滑坡,表现出复杂的地震后演变.
- 鉴定DGBL的变形模式是具有挑战性的,因为局部地形复杂.
研究的目的:
- 介绍DGBL表面动态的第一个详细观测.
- 调查导致山体滑坡持续变形的因素.
主要方法:
- 整合卫星和地面干扰测量合成孔径雷达 (InSAR) 数据.
- 使用LiDAR衍生的数字表面模型 (DSM) 的动态解释.
主要成果:
- 卫星InSAR检测到最大视线 (LOS) 移位速度约为每年80.9毫米 (2021-2023年).
- 地基SAR (GB-SAR) 确定了后边的局部变形,LOS速度高达1.5mm/h.
- 下坡移位速度在每年60.5毫米至每年69.5毫米之间.
结论:
- 的地形和脆弱的,关节性岩层结构是DGBL持续变形的主要驱动因素.
- 通过将卫星和地面InSAR相结合,可以有效地解释复杂的山体滑坡动态.
- 这项研究突出了多源InSAR用于山体滑坡监测的互补优势.
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