Numerical study on infragravity wave hydrodynamics of permeable fringing reef

Wang Xu; Qu Ke; Men Jia

doi:10.12284/hyxb2023118

Volume 45 Issue 9

Sep. 2023

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Wang Xu，Qu Ke，Men Jia. Numerical study on infragravity wave hydrodynamics of permeable fringing reef[J]. Haiyang Xuebao，2023, 45(9)：152–167 doi: 10.12284/hyxb2023118

Citation:

Wang Xu，Qu Ke，Men Jia. Numerical study on infragravity wave hydrodynamics of permeable fringing reef[J]. Haiyang Xuebao，2023, 45(9)：152–167 doi: 10.12284/hyxb2023118

Citation:

Wang Xu，Qu Ke，Men Jia. Numerical study on infragravity wave hydrodynamics of permeable fringing reef[J]. Haiyang Xuebao，2023, 45(9)：152–167 doi: 10.12284/hyxb2023118

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Numerical study on infragravity wave hydrodynamics of permeable fringing reef

doi: 10.12284/hyxb2023118

Wang Xu^1
,,
Qu Ke^{1, 2, 3
,
,},
Men Jia¹

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

Received Date: 2023-02-10
Rev Recd Date: 2023-04-20

Available Online: 2023-09-01

Publish Date: 2023-09-30

Abstract

Abstract

Based on the nonhydrostatic single-phase flow numerical wave model (NHWAVE), the propagation of random waves on a permeable fringing reef is simulated numerically, and the effects of incident wave height, water depth on reef flat, spectrum peak period, thickness of permeable layer, porosity and median diameters the hydrodynamic characteristics of waves on the fringing reef are considered comprehensively, focusing on the variation of sea-swell wave height, infragravity wave height and mean water level along the reef, and comparing with that of the fringing reef without permeable layer. The study shows that the existence of the permeable layer has a significant impact on the hydrodynamic characteristics of waves on the fringing reef. The study shows that the existence of the permeable layer reduces the shallow water deformation of waves on the slope in front of the reef and the wave breaking near the reef edge, and significantly decreases the sea-swell wave height, infragravity wave height, and wave setup near the shoreline, in addition to that, the existence of the permeable layer reduces the maximum wave runup on the shoreline. The greater the incident wave height and spectrum peak period, the more significant the effect of the permeable layer on the sea-swell wave, infragravity wave and wave setup on the fringing reef; when the water depth of the reef is increased, the effect of the permeable layer on wave attenuation is weakened; as the thickness of the permeable layer increases, the values of sea-swell wave height, infragravity wave height and wave setup near the shoreline decrease.
- permeable fringing reef,
- transformation deformation,
- infragravity wave,
- wave setup,
- nonhydrostatic single-phase flow numerical wave model (NHWAVE)

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References(34)

References

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