Experimental studies of rip current systems induced by the intersecting waves near a groin

Yan Sheng; Zou Zhili; Xu Jie; Chang Chengshu; You Zaijin; Wang Dong

doi:10.12284/hyxb2023149

Volume 45 Issue 10

Oct. 2023

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Yan Sheng，Zou Zhili，Xu Jie, et al. Experimental studies of rip current systems induced by the intersecting waves near a groin[J]. Haiyang Xuebao，2023, 45(10)：135–146 doi: 10.12284/hyxb2023149

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Experimental studies of rip current systems induced by the intersecting waves near a groin

doi: 10.12284/hyxb2023149

Yan Sheng^{1, 2, 3
,},
Zou Zhili^{2
,
,},
Xu Jie²,
Chang Chengshu²,
You Zaijin^{1, 3},
Wang Dong⁴

1.
College of Transportation Engineering, Dalian Maritime University, Dalian 116026, China
2.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China
3.
Center for Ports and Maritime Safety, Dalian Maritime University, Dalian 116026, China
4.
College of Environmental Sciences and Engineering , Dalian Maritime University, Dalian 116026, China

Received Date: 2023-02-10
Rev Recd Date: 2023-06-10

Available Online: 2023-10-10

Publish Date: 2023-10-30

Abstract

Abstract

Rip currents are narrow and concentrated seaward-directed flows and play an important role on coastal morphodynamics, mass transport and swimmer safety. As the intersecting wave field caused by wave reflection of coastal structures is not uniform alongshore, the flow characteristics and spatial distribution of rip currents are different from those of uniform intersecting waves on an open coast. The reflection of waves on cross-shore coastal structures will lead to longshore standing waves, and rip currents will occur in the area of standing wave nodes because of the small wave height, which is one of the generation mechanisms for rip currents. In this study, the characteristics of rip current systems near a coastal structure on a barred beach are given by a laboratory experiment. The influence of the longshore variation of wave height on the flow balance of each rip current unit is discussed. The results showed that the existence of structure drives a longshore current away from the structure and causes the water exchange between each rip current unit. The lateral currents between rip current units are found to make contributions to the rip current transport of each rip current unit and the contributions mainly depend on the relative position of the unit to the structure.
- rip current system,
- intersecting waves,
- barred beach,
- coastal structures,
- physical experiments

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References(26)

References

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