Identification and Deformation Characteristics of Active Landslides at Large Hydropower Stations at the Early Impoundment Stage: A Case Study of the Lianghekou Reservoir Area in Sichuan Province, Southwest China
Abstract
:1. Introduction
2. Study Area
3. Data and Methodology
3.1. Data
3.2. Methods
3.2.1. Identification of Active Landslides
3.2.2. Temporal Analysis of Deformation in Active Landslides
3.2.3. Pearson Correlation Analysis
4. Results
4.1. Active Landslide Identification Results
4.2. Deformation Characteristics of Typical Active Landslides
4.2.1. Boluzi Landslide
4.2.2. Waduo Landslide
4.3. Landslide Deformation Correlation with Reservoir Water Level and Rainfall
5. Discussion
5.1. Effect of the SAR Geometry
5.2. Response of Landslide Deformation to Reservoir Water Level
5.3. Response of Landslide Deformation to Rainfall
5.4. Limitations and Prospect
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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SAR Sensor | Sentinel-1A | |
---|---|---|
Orbital direction | Ascending/descending | |
Image mode | IW | |
Polarization | VV | |
Wavelength | C-band (5.6 cm) | |
Resolution (azimuth/range) | 5 m × 20 m | |
Revisit period | 12 days | |
Azimuth angle | −12.8°/192.74° | |
Angle of incidence | 36.94°/39.60° | |
Collection date | 24 January 2017 to 12 March 2024 | |
19 June 2018 to 7 March 2024 | ||
Scenes | 401/306 | |
Image coverage | Ascending track: | Path 26: Frame 93/Frame 98 |
Descending track: | Path 135: Frame 488/Frame 493 |
River | Total Landslides | Percentage of Landslides | Distribution | Right Bank | Left Bank |
---|---|---|---|---|---|
Xianshui R. | 47 | 62.7% | Mainly on the right bank | 34 | 13 |
Yalong R. | 26 | 34.7% | Evenly distributed on the two banks | 11 | 15 |
Qingda R. | 2 | 2.6% | Mainly distributed on the left bank | 0 | 2 |
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Li, X.; Li, W.; Wu, Z.; Xu, Q.; Zheng, D.; Dong, X.; Lu, H.; Shan, Y.; Zhou, S.; Yu, W.; et al. Identification and Deformation Characteristics of Active Landslides at Large Hydropower Stations at the Early Impoundment Stage: A Case Study of the Lianghekou Reservoir Area in Sichuan Province, Southwest China. Remote Sens. 2024, 16, 3175. https://doi.org/10.3390/rs16173175
Li X, Li W, Wu Z, Xu Q, Zheng D, Dong X, Lu H, Shan Y, Zhou S, Yu W, et al. Identification and Deformation Characteristics of Active Landslides at Large Hydropower Stations at the Early Impoundment Stage: A Case Study of the Lianghekou Reservoir Area in Sichuan Province, Southwest China. Remote Sensing. 2024; 16(17):3175. https://doi.org/10.3390/rs16173175
Chicago/Turabian StyleLi, Xueqing, Weile Li, Zhanglei Wu, Qiang Xu, Da Zheng, Xiujun Dong, Huiyan Lu, Yunfeng Shan, Shengsen Zhou, Wenlong Yu, and et al. 2024. "Identification and Deformation Characteristics of Active Landslides at Large Hydropower Stations at the Early Impoundment Stage: A Case Study of the Lianghekou Reservoir Area in Sichuan Province, Southwest China" Remote Sensing 16, no. 17: 3175. https://doi.org/10.3390/rs16173175