Experimental study of wave transformation around the surf zone over fringing reefs

Yao Yu; Du Ruichao; Yuan Wancheng; Jiang Changbo

doi:10.3969/j.issn.0253-4193.2015.12.007

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Yao Yu, Du Ruichao, Yuan Wancheng, Jiang Changbo. Experimental study of wave transformation around the surf zone over fringing reefs[J]. Haiyang Xuebao, 2015, 37(12): 66-73. doi: 10.3969/j.issn.0253-4193.2015.12.007

Citation:

Yao Yu, Du Ruichao, Yuan Wancheng, Jiang Changbo. Experimental study of wave transformation around the surf zone over fringing reefs[J]. Haiyang Xuebao, 2015, 37(12): 66-73. doi: 10.3969/j.issn.0253-4193.2015.12.007

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Experimental study of wave transformation around the surf zone over fringing reefs

doi: 10.3969/j.issn.0253-4193.2015.12.007

1.
School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410004, China;State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
2.
School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410004, China

Received Date: 2015-05-07
Rev Recd Date: 2015-06-27

Abstract

Abstract

A series of laboratory experiments are performed in a wave flume to investigate the wave transformation around the surf zone over fringing reefs. Experimental results are reported for four reef-flat submergences,four fore-reef slopes and a variety of regular wave conditions using an idealized fringing reef model. The surfzone width,as well as the wave incidence,reflection,transmission and energy dissipation around the surf zone are measured,and the effects of higher harmonics are considered to evaluate the transmission coefficient on the reef flat. Data analysis shows that the ratio of reef-flat submergence to deep-water wave height,i.e.,the relative reef-flat submergence,is a key factor to control the wave transformation around the surf zone over fringing reefs,however the influence of fore-reef slope is negligible within the test range. The sufzone width is comparable with shallow-water wave length on the reef flat and it increases with decreasing of relative reef-flat submergence. The transmitted coefficient increases almost linearly with increasing relative reef-flat submergence but such trend could not be found for the reflection coefficient. More than 50% of incident wave energy can be damped by the fringing reef,and larger energy dissipation occurs at a lower relative reef-flat submergence.
- wave transformation,
- surf zone,
- laboratory experiments,
- fringing reef

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References(16)

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