【摘要】 提出了一个准三维浅水潮流场的数学模型，并应用于大连湾的潮流场计算。其中设水平方向的速度沿水深方向的变化为抛物线型，仍将统治方程沿水深方向积分，所得到的求解方程与传统的浅水垂向积分方程略有不同，对非线性项的垂向平均更加完整。数值结果表明，本模型具有较好的实用性。更多还原

【Abstract】 A quasi 3-D model for tidal current in coastal areas is presented in which the horizontal velocities (u,v) are expressed as a quadratic function of variable z which varies along the depth direction. The numerical methed has the advantages of both the finite difference and the finite element methods. As an example of application, the tidal current of Dalian Bay has been calculated by present method. The comparisons demonstrate that the free surface elevation and velocity obtained by present method are very close to those given by the classical model and by the observational result. It shows the success of the present model.更多还原