Prediction of the wave induced by a gaint accumulation impoundment instability in Lantsang River

• Published in: 地质科技通报 Vol. 43; no. 6; pp. 78 - 88
• Main Authors: Daru HU, Shuyu WU, Chaopeng LUO, Hui DENG, Pengfei LI, Zhaoying WANG
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Bulletin of Geological Science and Technology 01.11.2024
• Subjects: centrifuge model test; giant accumulation; instability mode; lantsang river; prediction of landslidewave chain disaster
• ISSN: 2096-8523
• DOI: 10.19509/j.cnki.dzkq.tb20230598

Objective The RM hydropower station is proposed to be constructed in the upper reaches of the Lancang River. Its impoundment and operation might result in deformation and instability of the RS giant accumulation on the left bank near the dam, thereby triggering landslide-induced wave disasters and endangering the safety of the key hydraulic structures and the downstream residents. Methods This study combines extensive geological surveys and physical mechanics experiments to investigate the potential instability and failure modes of RS accumulation under reservoir filling. On this basis, a three-dimensional numerical model of the entire river channel from the RS accumlation to the dam section was established. An analysis of the dynamic evolution of landslide-wave chain disasters caused by RS accumulation was conducted, and parameters such as the initial wave height, wave height along the opposite bank, propagation characteristics, wave height at the dam front, and wave height climbing along the dam were predic