Identify the impacts of waves and tides to coastal suspended sediment concentration based on high-frequency acoustic observations

被引:17
|
作者
Fan, Renfu [1 ]
Wei, Hao [1 ]
Zhao, Liang [2 ]
Zhao, Wei [1 ]
Jiang, Chengfei [1 ]
Nie, Hongtao [1 ]
机构
[1] Tianjin Univ, Sch Marine Sci & Technol, Tianjin 300072, Peoples R China
[2] Tianjin Univ Sci & Technol, Coll Marine & Environm Sci, Tianjin 300457, Peoples R China
基金
中国国家自然科学基金;
关键词
Suspended sediment; Tidal flow; Waves; Turbulence; Coastal waters; TURBULENT KINETIC-ENERGY; REYNOLDS STRESS; SHEAR-STRESS; RESUSPENSION; BAY; TRANSPORT; MOMENTUM;
D O I
10.1016/j.margeo.2018.12.005
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
High-frequency measurements of wind, waves, tides, suspended sediment concentration (SSC), and turbulence were made using an autonomous meteorological station and optical and acoustic instruments over 34 days during January 20-February 23, 2016, in Heini Bay, Yellow Sea. The responses of SSC on different dynamic processes are analyzed by decomposing the velocity and SSC fluctuations into wave and turbulent components. In the presence of SSC fronts, the horizontal advection by the reciprocating tidal flow would cause an asymmetry of SSC in a flood-ebb tidal cycle. The presence of swells induced intensified sediment resuspension and a flood-ebb symmetry of SSC. In the bottom boundary layer, the net horizontal sediment fluxes were significantly increased in the presence of strong waves. Significant amount of suspended sediments were taken away from the study area, implying the occurrence of coastal erosion.
引用
收藏
页码:154 / 164
页数:11
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