The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology
After the first impoundment of the reservoir, many landslides seriously threatened the safety of the reservoir. Accurate determination of the relationship between the landslide deformation characteristics and water-level fluctuations is crucial. However, with the increasing number of water-level flu...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1055890/full |
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| author | Lingjing Li Lingjing Li Lingjing Li Lingjing Li Xin Yao Xin Yao Xin Yao Baoping Wen Zhenkai Zhou Renjiang Li |
| author_facet | Lingjing Li Lingjing Li Lingjing Li Lingjing Li Xin Yao Xin Yao Xin Yao Baoping Wen Zhenkai Zhou Renjiang Li |
| author_sort | Lingjing Li |
| collection | DOAJ |
| description | After the first impoundment of the reservoir, many landslides seriously threatened the safety of the reservoir. Accurate determination of the relationship between the landslide deformation characteristics and water-level fluctuations is crucial. However, with the increasing number of water-level fluctuation cycles, the deformation characteristics of the landslides were also changing, and long-term continuous monitoring to capture the failure process of reservoir landslides is necessary. A large reacted landslide in the Xiluodu reservoir was set as an example, using InSAR technology to seek its variations of deformation characteristics over nine years. The local deformation rate and annual maximum deformation area variation were analyzed by InSAR technology based on Sentinel-1 descending SAR data from October 2014 to June 2022. According to the regional deformation characteristics, the landslide was divided into three zones: Zone I above the elevation of 950 m; Zone II below it; the front edge of Zone II, where the collapse happened, was further divided into Zone III. In general, the accumulated deformation in Zone I was the largest, followed by Zone III, and Zone II was the smallest. The average deformation rate of Zone II was the smallest. Zone I of NLJL was mainly affected by the drawdown of reservoir water level, and the impacts of water-level rising and drawdown on Zone II and Zone III were similar. After analyzing a nine-year variation of the deformation area, the deformation mechanism of NLJL changed from a retrogressive type to a progressive one after the first impoundment and then changed back to a retrogressive one after 2017. The impact of reservoir impoundment on NLJL was most substantial in the first three years after the first impoundment. |
| first_indexed | 2024-04-10T22:42:16Z |
| format | Article |
| id | doaj.art-e90f11e7e81e4de39630bd058901997a |
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| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T22:42:16Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-e90f11e7e81e4de39630bd058901997a2023-01-16T04:21:52ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10558901055890The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technologyLingjing Li0Lingjing Li1Lingjing Li2Lingjing Li3Xin Yao4Xin Yao5Xin Yao6Baoping Wen7Zhenkai Zhou8Renjiang Li9Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, ChinaSchool of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, ChinaKey Laboratory of Active Tectonics and Geological Safety, Ministry of Natural Resources, Beijing, ChinaResearch Center of Neotectonism and Crustal Stability, China Geological Survey, Beijing, ChinaInstitute of Geomechanics, Chinese Academy of Geological Sciences, Beijing, ChinaKey Laboratory of Active Tectonics and Geological Safety, Ministry of Natural Resources, Beijing, ChinaResearch Center of Neotectonism and Crustal Stability, China Geological Survey, Beijing, ChinaSchool of Water Resources and Environment, China University of Geosciences (Beijing), Beijing, ChinaSchool of Engineering and Technology, China University of Geosciences (Beijing), Beijing, ChinaImmigration Work Office, China Three Gorges Corporation, Chengdu, ChinaAfter the first impoundment of the reservoir, many landslides seriously threatened the safety of the reservoir. Accurate determination of the relationship between the landslide deformation characteristics and water-level fluctuations is crucial. However, with the increasing number of water-level fluctuation cycles, the deformation characteristics of the landslides were also changing, and long-term continuous monitoring to capture the failure process of reservoir landslides is necessary. A large reacted landslide in the Xiluodu reservoir was set as an example, using InSAR technology to seek its variations of deformation characteristics over nine years. The local deformation rate and annual maximum deformation area variation were analyzed by InSAR technology based on Sentinel-1 descending SAR data from October 2014 to June 2022. According to the regional deformation characteristics, the landslide was divided into three zones: Zone I above the elevation of 950 m; Zone II below it; the front edge of Zone II, where the collapse happened, was further divided into Zone III. In general, the accumulated deformation in Zone I was the largest, followed by Zone III, and Zone II was the smallest. The average deformation rate of Zone II was the smallest. Zone I of NLJL was mainly affected by the drawdown of reservoir water level, and the impacts of water-level rising and drawdown on Zone II and Zone III were similar. After analyzing a nine-year variation of the deformation area, the deformation mechanism of NLJL changed from a retrogressive type to a progressive one after the first impoundment and then changed back to a retrogressive one after 2017. The impact of reservoir impoundment on NLJL was most substantial in the first three years after the first impoundment.https://www.frontiersin.org/articles/10.3389/feart.2022.1055890/fulllandslide deformationInSARthe Xiluodu reservoir areathe long-time monitoringretrogressive landslideprogressive landslide |
| spellingShingle | Lingjing Li Lingjing Li Lingjing Li Lingjing Li Xin Yao Xin Yao Xin Yao Baoping Wen Zhenkai Zhou Renjiang Li The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology Frontiers in Earth Science landslide deformation InSAR the Xiluodu reservoir area the long-time monitoring retrogressive landslide progressive landslide |
| title | The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology |
| title_full | The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology |
| title_fullStr | The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology |
| title_full_unstemmed | The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology |
| title_short | The long-term failure processes of a large reactivated landslide in the Xiluodu reservoir area based on InSAR technology |
| title_sort | long term failure processes of a large reactivated landslide in the xiluodu reservoir area based on insar technology |
| topic | landslide deformation InSAR the Xiluodu reservoir area the long-time monitoring retrogressive landslide progressive landslide |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1055890/full |
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