Dynamic structures and their sedimentation effects of the Yamen Inlet,Huangmaohai Estuary  

作　　者：WEI Xing WU XiaoXing 

机构地区：[1]Key Laboratory of Tropical Marine Environmental Dynamics,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301,China [2]Center for Coastal Ocean Science and Technology Research,Sun Yetsen University,Guangzhou 510275,China [3]South China Sea Marine Prediction Center,State Oceanic Administration,Guangzhou 510300,China

出　　处：《Science China Earth Sciences》2011年第6期936-946,共11页中国科学(地球科学英文版)

基　　金：supported by Guangdong Natural Science Foundation (Grant No. 9151027501000111);‘908’ Marine Survey Project (Grant No. 908-02-01-04);National Natural Science Foundation of China (Grant No. 50839005)

摘　　要：One of eight gates of the Pearl River Estuary,the Yamen Inlet is a bedrock channel mouth connecting the Huangmao Sea and Yamen Channel.The wider water surfaces of the upper and lower reaches of the entrance produce a unique bidirectional asymmetrical jet system.Using observed hydrology and historical charts,the ECOMSED model was applied in morphodynamic analysis of the dynamic structures and dynamic equilibrium of the Yamen jet system and its effect on sedimentation.It was found that (1) the nonlinear interaction of Yamen dynamic structures could not be ignored,as while the Coriolis force and friction force were generally of the same order of magnitude,the effect of friction force was greater;(2) the bidirectional asymmetrical jet system was flood preferential flow to the north of the channel mouth and ebb preferential flow to the south;and (3) the bidirectional asymmetrical jet system was the dominant factor in the long term stability of the Yamen deep trough.One of eight gates of the Pearl River Estuary,the Yamen Inlet is a bedrock channel mouth connecting the Huangmao Sea and Yamen Channel.The wider water surfaces of the upper and lower reaches of the entrance produce a unique bidirectional asymmetrical jet system.Using observed hydrology and historical charts,the ECOMSED model was applied in morphodynamic analysis of the dynamic structures and dynamic equilibrium of the Yamen jet system and its effect on sedimentation.It was found that (1) the nonlinear interaction of Yamen dynamic structures could not be ignored,as while the Coriolis force and friction force were generally of the same order of magnitude,the effect of friction force was greater;(2) the bidirectional asymmetrical jet system was flood preferential flow to the north of the channel mouth and ebb preferential flow to the south;and (3) the bidirectional asymmetrical jet system was the dominant factor in the long term stability of the Yamen deep trough.

关 键 词：Yamen Inlet bidirectional jet dynamic structure dynamic equilibrium SEDIMENTATION 

分 类 号：P333.4[天文地球—水文科学]