人工梯形生态礁体对复杂岛礁次重力波浪特性影响的试验研究

doi:10.11978/2024137

Abstract

Abstract:

Through physical model tests in the wave flume, the influence of an artificial trapezoidal ecological reef on the infragravity wave characteristics in the complex island reef environment was investigated and compared with the case of no reef. The wave propagation, reflection, and attenuation effects of the artificial trapezoidal ecological reef in the complex island reef terrain were systematically analyzed. The experimental study shows that the wave height was significantly reduced in the rear area of the ecological reef. The ecological reef effectively weakened the wave breaking near the reef, which reduced the wave set-up value, and decreased the wave height of shortwave and low-frequency longwave near the reef. The existence of the ecological reef also helped reduce the maximum run-up of waves on slopes; the amplitude of wave attenuation increased with the decrease of the pore size of the ecological reef. Additionally, when the wave height and spectral peak period of the incident wave increased, the ecological reef had a more pronounced effect on the shortwave wave height, low-frequency longwave wave height and wave set-up. However, with the increase of water depth of the reef flat, the effect of the ecological reef on the weakening of wave energy showed a decreasing trend. The reflection coefficient in the presence of the ecological reef was generally higher than that in its absence.

Key words: ecological reef, infragravity wave, low-frequency longwave, complex reefs, wave characteristics

CLC Number:

NIE Wenjun, QU Ke, WANG Chao, YU Renshi, LIU Yewenya. Experimental study on the influence of artificial trapezoidal ecological reefs on the infragravity wave characteristics in complex reefs[J].Journal of Tropical Oceanography, 2025, 44(3): 48-57.

Figures/Tables 18

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浪高仪编号	浪高仪位置/m	浪高仪编号	浪高仪位置/m
1^#	12.58	10^#	25.34
2^#	13.121	11^#	25.855
3^#	13.679	12^#	26.35
4^#	23.23	13^#	26.9105
5^#	23.515	14^#	27.471
6^#	23.8	15^#	28.0315
7^#	24.085	16^#	28.592
8^#	24.37	17^#	29.1525
9^#	24.655	18^#	29.713

工况	礁坪水深h_r/m	入射波高H/m	谱峰周期T_p/m	孔径r/m
A1	0.025	0.04	1.50	0.0075
A2	0.025	0.04	1.50	无礁体
A3	0.025	0.06	1.50	0.01
A4	0.025	0.06	1.50	0.005
A5	0.025	0.06	1.00	0.0075
A6	0.025	0.06	1.25	0.0075
A7	0.025	0.06	1.50	0.0075
A8	0.025	0.06	1.75	0.0075
A9	0.025	0.06	2.00	0.0075
A10	0.025	0.06	1.00	无礁体
A11	0.025	0.06	1.25	无礁体
A12	0.025	0.06	1.50	无礁体
A13	0.025	0.06	1.75	无礁体
A14	0.025	0.06	2.00	无礁体
A15	0.025	0.06	1.50	无礁体
A16	0.025	0.08	1.50	0.0075
A17	0.025	0.08	1.50	无礁体
A18	0.025	0.10	1.50	0.0075
A19	0.025	0.10	1.50	无礁体
B1	0	0.06	1.50	0.0075
B2	0	0.06	1.50	无礁体
B3	0.05	0.06	1.50	0.0075
B4	0.05	0.06	1.50	无礁体
B5	0.075	0.06	1.50	0.0075
B6	0.075	0.06	1.50	无礁体

Experimental study on the influence of artificial trapezoidal ecological reefs on the infragravity wave characteristics in complex reefs

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