潮汐通道水动力和泥沙的湍参数化效应:南海北部崖门水道  

Effects of Turbulence Parameterization on Hydrodynamics and Sediment Transport in Tidal Channels:A Case Study of Yamen Channel in the Northern South China Sea

作　　者：杨一 刘金贵 李谊纯 张春华 Yi Yang;Jingui Liu;Yichun Li;Chunhua Zhang(Haikou Marine Environment Monitoring Station,State Oceanic Administration,Haikou 570000,China;College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang 524088,China;Key Laboratory of Harbour,Coastal and Offshore Engineering,Beibu Gulf University,Qinzhou 535011,China)

机构地区：[1]Haikou Marine Environment Monitoring Station,State Oceanic Administration,Haikou 570000,China [2]College of Ocean and Meteorology,Guangdong Ocean University,Zhanjiang 524088,China [3]Key Laboratory of Harbour,Coastal and Offshore Engineering,Beibu Gulf University,Qinzhou 535011,China

出　　处：《哈尔滨工程大学学报（英文版）》2023年第2期284-295,共12页Journal of Marine Science and Application

基　　金：Supported by the Scientific Research Start-up Funds of Guangdong Ocean University(Grant No.060302032202).

摘　　要：In this study,we conducted numerical experiments to examine the effects of turbulence parameterization on temporal and spatial variations of suspended sediment dynamics.Then,we applied the numerical model to the Yamen Channel,one of the main eight outfalls in the Pearl River Delta.For the field application,we implemented the k−εscheme with a reasonable stability function using the continuous deposition formula during the erosion process near the water-sediment interface.We further validated and analyzed the temporal-spatial suspended sediment concentrations(SSCs).The experimental results show that under specified initial and boundary conditions,turbulence parameterization with stability functions can lead to different vertical profiles of the velocity and SSC.The k−εpredicts stronger mixing with a maximum value of approximately twice the k−kl.The k−kl results in smaller SSCs near the surface layer and a larger vertical gradient than the k−ε.In the Yamen Channel,though the turbulent dissipation,turbulent viscosity and turbulence kinetic energy exhibit similar trends,SSCs differ significantly between those at low water and high water due to the tidal asymmetry and settling lag mechanisms.The results can provide significant insights into environmental protection and estuarine management in the Pearl River Delta.

关 键 词：Suspended sediment General ocean turbulence model(GOTM) Turbulence parameterization Yamen Channel Finite volume community ocean model(FVCOM) 

分 类 号：P731[天文地球—海洋科学]