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<p>This study presents a systematic investigation of tsunami resonance characteristics in the Pearl River Estuary and examines the influence of solitary waves with varying wave heights on the regional coastline. The research employed an extended mild-slope equation (EMSE) model in the frequency domain to determine eigenperiods and corresponding resonant modal shapes for the Pearl River Estuary, with the frequency-domain simulation results validated through FFT analysis. The FUNWAVE-total variation diminishing (TVD) model was subsequently applied to simulate the propagation, evolution, and run-up processes of solitary waves with different incident wave heights along the estuary coastline. Analysis revealed that within the studied range of incident wave heights and periods, the maximum and minimum periods were 120 min and 49 min, respectively. The most intense oscillations occurred at resonant modes corresponding to periods of 120 min and 63 min. The time-domain eigenperiods of 90 min, 68 min, and 49 min demonstrated strong correlation with the frequency-domain results of 92 min, 68 min, and 49 min. The outer island chain exhibited a significant blocking effect, resulting in wave run-up concentration at the estuary mouth, with limited energy propagation into the inner estuary regions.</p>

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Investigation on the Tsunami Resonance Characterization in Pearl River Estuary

  • 期刊论文

  • 发表日期：

    2026年1月7日

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  • Jun-liang Gao,
  • Lin-hui Hou,
  • Sai-shuai Dai,
  • Ying-di Liao

摘要

This study presents a systematic investigation of tsunami resonance characteristics in the Pearl River Estuary and examines the influence of solitary waves with varying wave heights on the regional coastline. The research employed an extended mild-slope equation (EMSE) model in the frequency domain to determine eigenperiods and corresponding resonant modal shapes for the Pearl River Estuary, with the frequency-domain simulation results validated through FFT analysis. The FUNWAVE-total variation diminishing (TVD) model was subsequently applied to simulate the propagation, evolution, and run-up processes of solitary waves with different incident wave heights along the estuary coastline. Analysis revealed that within the studied range of incident wave heights and periods, the maximum and minimum periods were 120 min and 49 min, respectively. The most intense oscillations occurred at resonant modes corresponding to periods of 120 min and 63 min. The time-domain eigenperiods of 90 min, 68 min, and 49 min demonstrated strong correlation with the frequency-domain results of 92 min, 68 min, and 49 min. The outer island chain exhibited a significant blocking effect, resulting in wave run-up concentration at the estuary mouth, with limited energy propagation into the inner estuary regions.