长江河口涨落潮不对称性动力成因分析  

A study on the dynamics of the asymmetry between flood and ebb in the Changjiang Estuary

作　　者：王彪[1] 朱建荣[1] 李路[1] 

机构地区：[1]华东师范大学河口海岸国家重点实验室,上海200062

出　　处：《海洋学报》2011年第3期19-27,共9页

基　　金：国家自然科学基金(40976056);全球变化研究国家重大科学研究计划资助(2010CB951201);国家水体污染控制与治理科技重大专项(2008ZX07421-001)

摘　　要：长江河口存在着涨落潮流速和历时的不对称现象。本应用长江河口三维数值模式,数值试验定量给出了不同径流量、潮汐和水深下南北支、南北港和南北槽涨潮落潮平均流速和历时,通过横断面涨潮落潮通量必须满足质量守恒观点从动力机制上给出了涨潮落潮流速和历时不对称的成因。There exists the asymmetry of current speed and duration between flood and ebb in the Changjiang Estuary.Applied the three-dimension numerical model in the Changjiang Estuary,the mean flood/ebb current speed and duration in the South/North Branch,South/North Channel and South/North Passage under different river discharges,tide and water depth were given out quantitatively by the numerical experiments.The dynamic causes of the asymmetry of flood/ebb current speed and duration are explained in the view of mass conservation by the water flux through the transect during flood and ebb period.

关 键 词：长江河口 涨落潮不对称 径流量 潮汐 数值试验 

分 类 号：P343.5[天文地球—水文科学] P731.22[天文地球—地球物理学]