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基于FVCOM三维海洋数值模式建立了黄河口水动力模型,通过实测资料对数值模型进行了验证。验证结果表明建立的模型能很好的反映研究区域的水动力特性。利用该模型的数值模拟较好地再现了黄河口切变锋现象,并对两种不同类型的切变锋的形成、传播和持续时间的规律进行了分析研究。利用历年来黄河口地形演变的大致规律对黄河口附近的水下地形进行了演变,发现地形对切变锋形成位置有一定的影响,例如随着地形向外海淤进,切变锋的位置也随之向外海移动。还研究了地形的变化对黄河口海域盐度分布的影响,发现随着地形的演变,低盐度海水分布的范围会随之变大。
Based on the FVCOM 3D ocean numerical model, the Yellow River Estuary hydrodynamic model was established, and the numerical model was verified by the measured data. The verification results show that the established model can well reflect the hydrodynamic characteristics of the study area. The numerical simulation of this model can well reproduce the shear front of the Yellow River Estuary, and the formation, propagation and duration of two different types of shear deformation are analyzed. Based on the evolution of the Yellow River estuary over the years by using the general rules of the Yellow River estuary near the underwater terrain evolution and found that the formation of shear deformation front has a certain impact on the location of the formation, Followed by the sea to move. The effect of topographic changes on the salinity distribution of the Yellow River Estuary was also studied. It was found that with the evolution of the terrain, the range of low-salinity seawater distribution will become larger.