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<p>Impulse wave generated by the failure of large deposits in reservoirs directly affect dam safety. This study takes a large potential reservoir deposit in southwest China’s Lancang River as an example, determines its failure mode using centrifuge tests, investigates the propagation attenuation characteristics of impulse waves generated by RS deposit failure by constructing 1:200 large-scale physical simulation tests and numerical simulations based on fluid‒solid coupling, and explores the mechanism and influencing factors of impulse wave propagation attenuation in mountainous reservoir channels. The failure of the deposits produced maximum wave amplitude in excess of 30&#xa0;m in the river channel. In this study, we obtained the ratio of wave amplitude attenuation along the propagation of impulse waves generated by RS deposit failure and analyzed the wave attenuation characteristics: waves are generated, climb toward the opposite shore and then fall back and show periodic attenuation, the wave form propagating downstream gradually breaks irregularly, the waves are in sharp attenuation within 1.5&#xa0;km from the deposits, after which they slowly attenuate but with small fluctuations in some areas, and the attenuation ratio is the largest in the nearly straight river channel. When the impulse wave propagates in the river channel of mountain reservoirs, its wave amplitude as a whole decreases with increasing propagation distance, but the degree of attenuation is different in different areas. Its propagation is mainly affected by the obstruction of the bend, frictional resistance, bank bounce interference, and the width change of the river channel.</p>

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Study on impulse wave propagation attenuation generated by the failure of large deposits in a reservoir of the Lancang River

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Yuhao Liu,
  • Guoxiang Tu,
  • Jingtao Shi,
  • Bo Luo,
  • Yanmei Zhang,
  • Xin Zhang,
  • Hao Tang,
  • Qifeng Luo

摘要

Impulse wave generated by the failure of large deposits in reservoirs directly affect dam safety. This study takes a large potential reservoir deposit in southwest China’s Lancang River as an example, determines its failure mode using centrifuge tests, investigates the propagation attenuation characteristics of impulse waves generated by RS deposit failure by constructing 1:200 large-scale physical simulation tests and numerical simulations based on fluid‒solid coupling, and explores the mechanism and influencing factors of impulse wave propagation attenuation in mountainous reservoir channels. The failure of the deposits produced maximum wave amplitude in excess of 30 m in the river channel. In this study, we obtained the ratio of wave amplitude attenuation along the propagation of impulse waves generated by RS deposit failure and analyzed the wave attenuation characteristics: waves are generated, climb toward the opposite shore and then fall back and show periodic attenuation, the wave form propagating downstream gradually breaks irregularly, the waves are in sharp attenuation within 1.5 km from the deposits, after which they slowly attenuate but with small fluctuations in some areas, and the attenuation ratio is the largest in the nearly straight river channel. When the impulse wave propagates in the river channel of mountain reservoirs, its wave amplitude as a whole decreases with increasing propagation distance, but the degree of attenuation is different in different areas. Its propagation is mainly affected by the obstruction of the bend, frictional resistance, bank bounce interference, and the width change of the river channel.