Abstract
The reservoir impoundment can lead to accelerated deformation or reactivation of landslides, posing great threats to human lives and dam stability. The primary objective of this paper is to report the movement process of the Tuandigou (TDG) ancient landslide in the Baihetan dam area during reservoir impounding. Field investigation, borehole work, and site monitoring data are used to analyze the deformation behavior and triggering mechanism of the TDG landslide. It is found that the landslide deformation is closely related to the reservoir water level. After the reservoir water level reached the elevation of 810Â m on October 12, 2022, the ground cracks continued to expand and gradually linked up, resulting in an accelerated deformation of the TDG landslide. Furthermore, the lithology in the study area also positively contributes to the slide movement. Based on these results, it is anticipated that the present research will provide guidelines for the early warning and control of the TDG landslide during and after the reservoir impounding.
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Data availability
The data that support the findings of this study are available on request from the corresponding author, Shiqi Liu. The data are not publicly available due to restrictions.
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Acknowledgements
The authors wish to acknowledge Xuewen Fan and Qi Li from Zhejiang Huadong Construction Engineering Corporation Limited for providing the monitoring data. In addition, the authors are very grateful for the constructive comments of the viewers, which significantly improved the quality of the manuscript.
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The work presented in this paper is supported by the Key Science and Technology Plan Project of PowerChina Huadong Engineering Corporation Limited (Grant No. KY2021-ZD-03).
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Cheng, Z., Liu, S., Fan, X. et al. Deformation behavior and triggering mechanism of the Tuandigou landslide around the reservoir area of Baihetan hydropower station. Landslides 20, 1679–1689 (2023). https://doi.org/10.1007/s10346-023-02093-9
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DOI: https://doi.org/10.1007/s10346-023-02093-9