【摘要】 利用ROMS(regional ocean modeling system)在九龙江河口区建立三维水动力模型,应用欧拉方法将盐度通量分解为河流所造成的盐度损失通量、河口交换造成的盐度通量以及潮汐振荡所造成的盐度通量.结果表明,九龙江的冲淡水造成河口盐度损失,而河口交换和潮汐振荡作用则对河流所造成的盐度损失进行补偿,三者都呈现出季节性的变化.分析表明,潮汐振荡作用是造成陆向的盐度通量的主导,相对河口交换作用而言九龙江属于潮汐控制型河口;同时海门岛至鸡屿处为河、海水混合最强烈的地带.更多还原

【Abstract】 A three-dimensional hydrodynamic model,based on the regional ocean modeling system(ROMS),was established in Jiulong River Estuary.The classical Eulerian method was utilized to decompose the tidally averaged salt flux into three components,salt loss due to river(FR),salt flux driven by steady exchange flow(FE)and tidal oscillatory salt flux(FT).The results show that salt loss due to FR in Jiulong River Estuary,can be compensated by FEand FT.The relative contribution of FEand FTto up-estuary salt flux can be defined as v=FT/(FE+FT)to classify the estuary.The tidal oscillatory flux dominates the total upstream salt flux when vis greater than 0.5.The distributions of vand the vertical salinity difference along channel show the mixing is strongest in the area between the Haimen Island and the Jiyu Islet along the channel.更多还原