Knowledge of sediment variation processes is essential to understand the evolution mechanism of beach morphology changes. Thus, a field measurement was conducted at the Heisha Beach, located on the west coast of the Zhujiang River (Pearl River) Estuary, to investigate the short-term variation in suspended sediment concentrations (SSCs) and the relationship between the SSC and turbulent kinetic energy, bottom shear stress (BSS), and relative wave height. Based on extreme event analysis results, extreme events have a greater influence on turbulent kinetic energy than SSC. Although a portion of the turbulent kinetic energy dissipates directly into the water column, it plays an important role in suspended sediment motion. Most of the time, the wave-current interaction is strong enough to drive sediment incipience and resuspension. When combined, the wave-current interaction and wave-induced BSSs have a greater influence on suspended sediment transport and SSC variation than current-induced BSS alone. The relative wave height also has a strong correlation with SSC, indicating that the combined effect of water depth and wave height significantly impacts SSC variation. Water depth is mainly controlled by the tide on the beaches; thus, the effects of tides and waves should be conjunctively considered when analyzing the factors influencing SSC.

Jintang Ou;Haoyan Dong;Liangwen Jia;Xiangxin Luo;Zixiao He;Kanglin Chen;Jing Liu;Yitong Lin;Mingdong Yu;Mingen Liang

School of Marine Engineering and Technology,Sun Yat-sen University,Guangzhou 510275,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai),Zhuhai 519080,China;School of Marine Sciences,Sun Yat-sen University,Guangzhou 510275,China;Guangdong Provincial Engineering Research Center of Coasts,Islands and Reefs,Guangzhou 510275,China;Institute of Estuarine and Coastal Research,School of Marine Engineering and Technology,Sun Yat-sen University,Guangzhou 510275,China

海洋学报（英文版）

[1]Jintang Ou;Haoyan Dong;Liangwen Jia;Xiangxin Luo;Zixiao He;Kanglin Chen;Jing Liu;Yitong Lin;Mingdong Yu;Mingen Liang-.Short-term variations and influencing factors of suspended sediment concentrations at the Heisha Beach, Guangdong, China)[J].海洋学报（英文版）,2022(05):51-63

Heisha,Zhujiang,incipience,BSSs,conjunctively

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