Experimental study on the influence of permeable trapezoidal reef on the hydrodynamic characteristics of solitary wave complex reefs

Yu Renshi; Qu Ke; Wang Chao; Liu Yewenya; Li Wei

doi:10.12284/hyxb2024113

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Yu Renshi，Qu Ke，Wang Chao, et al. Experimental study on the influence of permeable trapezoidal reef on the hydrodynamic characteristics of solitary wave complex reefs[J]. Haiyang Xuebao，2024, 46(10)：1–9 doi: 10.12284/hyxb2024113

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Experimental study on the influence of permeable trapezoidal reef on the hydrodynamic characteristics of solitary wave complex reefs

doi: 10.12284/hyxb2024113

Yu Renshi^1
,,
Qu Ke^{1, 2, 3
,
,},
Wang Chao¹,
Liu Yewenya¹,
Li Wei¹

1.
School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, China
2.
Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, China
3.
Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and restoration of Hunan Province, Changsha 410114, China

Received Date: 2024-07-09
Rev Recd Date: 2024-09-23

Available Online: 2024-09-30

Abstract

Abstract

As a natural barrier to the coast, coral reefs have caused irreversible damage in recent years due to the influence of human activities. How to resist the erosion of extreme waves has become an urgent problem for islands that have lost their natural barriers. Based on the physical model test of wave flume, this paper studies the complex hydrodynamic characteristics of solitary waves near coral reef topography from the parameters of incident wave height, reef flat water depth and pore radius, and reveals the wave dissipation mechanism of artificial reefs from the perspective of energy. The test results show that the permeable artificial reef can significantly weaken the wave energy, and the ability of the artificial reef group to weaken the wave energy has a certain limit. Under the influence of the reef, the wave is partially reduced after passing through the reef, and the effective water depth of the subsequent propagation on the reef flat can be reduced. The transmission coefficient and reflection coefficient increase with the increase of incident wave height. With the increase of reef flat water depth, the reflection coefficient decreases and the transmission coefficient increases. The reflection coefficient decreases with the increase of pore radius, and the transmission coefficient has no obvious law. The permeable trapezoidal reef can effectively reduce the transmission intensity of waves and realize the protection of islands. The permeable trapezoidal reef can not only weaken the wave energy, but also take into account the ecological friendliness, reduce the force of structures and provide space for water exchange.
- solitary wave,
- artificial reef,
- hydrodynamic characteristics,
- physical experiment,
- wave energy

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References(22)

References

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