Using advanced InSAR time series techniques to monitor landslide movements in Badong of the Three Gorges region, China
Using advanced InSAR time series techniques to monitor landslide movements in Badong of the Three Gorges region, China
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DOI：
10.1016/j.jag.2011.10.010
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Peng Liu;Zhenhong Li;T. Hoey;C. Kıncal;Jingfa Zhang;Q. Zeng;J. Muller
中科院分区：
文献类型：
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作者：
Peng Liu;Zhenhong Li;T. Hoey;C. Kıncal;Jingfa Zhang;Q. Zeng;J. Muller
三峡位于中国重庆奉节和湖北省宜昌之间的长江中游，全长193公里。由于河谷边坡陡峭，河流长期切割，滑坡是三峡地区的主要灾害。在本研究中，我们采用SBAS InSAR技术处理2003年至2010年期间收集的Envisat SAR图像。我们的时间序列结果能够识别出巴东县两个不同的滑坡，其变形速率高达10-15mm /年，并使用现场证据来验证这些破坏的位置。通过下降和上升观测，恢复了北上两个方向的二维速度场，更好地了解了滑坡运动。季节性滑坡运动与水位变化具有明显的相关性，这不仅为InSAR时间序列结果提供了强有力的支持，而且表明了水位变化对滑坡活动的影响。
The Three Gorges occupy 193km of the middle reaches of the Yangtze River between Fengjie in Chongqing and Yichang in Hubei Province, China. Due to steep valley-side slopes and long-term river incision, landslides are a major hazard in the Three Gorges region. In this study, we employ the SBAS InSAR technique to process Envisat SAR images collected between 2003 and 2010. Our time series results enable identification of two distinct landslides with deformation rates of up to 10–15mm/yr in Badong County, and field evidence is used to verify the positions of these failures. With both descending and ascending observations, two-dimensional velocity fields in north and up directions are recovered to better understand the landslide movements. Obvious correlation between seasonal landslide movements and water level changes is observed, which not only provides strong support of our InSAR time series results, but also indicates the impacts of water level changes to landslide activities.