

FOLLOWUS
1.Coastal Research Institute, Ludong University, Yantai 264025, China
2.Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 261005, China
schingwang@126.com
Received:27 December 2022,
Online First:12 April 2023,
Published:01 March 2024
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ZHU Jun,WANG Qing,ZHAN Chao,et al.Different responses of two adjacent artificial beaches to Typhoon Hato in Zhuhai, China[J].Journal of Oceanology and Limnology,2024,42(02):511-521.
ZHU Jun,WANG Qing,ZHAN Chao,et al.Different responses of two adjacent artificial beaches to Typhoon Hato in Zhuhai, China[J].Journal of Oceanology and Limnology,2024,42(02):511-521. DOI: 10.1007/s00343-023-2401-5.
Major differences in beach erosion between two neighboring artificial beaches Xiangluwan Beach (XL beach) and Meiliwan Beach (ML beach) in Zhuhai
China
were studied after Super Typhoon Hato. In this study
a fully nonlinear Boussinesq wave model (FUNWAVE)-Total Variation Diminishing (TVD) was used to distinguish the main impact factors
their relative contributions
and the hydrodynamic mechanisms underlying the different beach responses. Results show that compared to the ML beach
the main reason for the relatively weak erosion on Xiangluwan (XL) beach was the smaller beach berm height (accounting for approximately 75.9% of the erosion response). Regarding the beach with a higher berm
the stronger wave-induced undertow flow
along with the higher sediment concentration
led to a higher offshore sediment transport flux
resulting in more severe erosion relative to the beach with a smaller berm height. The second most important reason explaining the weak erosion on XL beach was the absence of seawalls (accounting for approximately 17.9% of the erosion response). Wave reflection induced by the seawall could cause higher suspended sediment concentration
resulting in a toe scouring near the seawall. The offshore submerged breakwater protected XL beach slightly (accounting for approximately 6.1% of the erosion response). Due to the higher water level induced by storm surge
most of the wave energy could penetrate through the submerged breakwater. The effect of the larger berm width of XL beach was negligible. Compared to the beach with a larger berm width
the erosion/deposition regions in the beach with a narrower berm width showed shoreward migration
without significant changes in the erosion/deposition extent. Despite of this
the larger berm width could reduce the wave energy reaching the shoreline. This study of the storm stability of artificial beaches may be applied to beach restoration design.
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