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瓯江河口分布有岛屿、浅滩和复杂岸界,受到径流、潮和风等多动力因子的共同作用。该文基于非结构有限体积海洋数值模式FVCOM,建立高分辨精细化瓯江河口动力模式,研究河口及其邻近海域潮动力过程。利用实测水文资料,对水位和流速均进行了有效检验。结合实测潮位和流速资料,分别进行潮汐和潮流准调和分析,并系统分析了潮汐特征及4个主要分潮(M2、S2、K1和O1)等振幅线和迟角的分布和变化;分析了潮流性质、潮流椭圆要素(长轴、椭率和椭圆方向)的水平分布和垂向变化;研究了潮波进入瓯江口海域后的耗散过程和各组成部分对动量方程的作用。
The Oujiang estuary distributes island, shoal and complicated shoreline, and is affected by multiple dynamic factors such as runoff, tide and wind. Based on the unstructured finite volume ocean numerical model FVCOM, a high resolution fine Oujiang estuary dynamic model is established to study the tidal dynamics of the estuary and its adjacent sea areas. Using the measured hydrological data, the water level and the flow rate are effectively tested. According to the measured tide and velocity data, the tidal and tidal current are analyzed and analyzed respectively. The tidal characteristics and the distribution and change of amplitude and delay of four main tidal currents (M2, S2, K1 and O1) are systematically analyzed. The tidal current, the tidal current, the horizontal distribution and the vertical variation of the tidal current elliptic elements (major axis, ellipticity and elliptical direction); the dissipation process and the contribution of each component to the momentum equation after the tidal wave enters the Oujiang Estuary are studied.