【摘要】 本文为描述速度和盐度沿河口的分布规律,而发展了二元横向积分的数值模型。表示质量守恒、动量守恒和含盐量或热容量的主管方程,采用样条函数和有限差分方法相结合进行求解。估计了对流项对速度和盐度分布的影响。 本模型已应用于詹姆斯湾(Jams Bay)区域的大鲸河(the Great Whale River)河口和小鲸河(the Little Whale River)河口的环流计算。本中介绍了模拟结果,并与现有实测数据作了比较。研究了计算模型对影响垂直扩散的不同层化参数值的敏感性,提供了一些初步结果。 在计算水力学中采用三次样条公式,证实是有前途的,值得进一步发展。更多还原

【Abstract】 A two-dimensional laterally integrated numerical model has been developed to represent the velocity and salinity distribution along an estuary.The governing equations which express the conservation of mass,momentum and salt or heat content,are solved by a finite diffrence method in combination with spline functions.The influence of the con-vec tive terms on the resulting distributions of velocity and salinity has been evaluated.The model has been applied to the estuary of the Great Whale River and the Little Whale River in the James Bay region.Results of the simulation have been presented together with comparison of some observational data.The sensitivity of the model to various values of the stratification parameters that influence vertical diffusion has been studied and some preliminary results presented.The use of the cubic spline formulation in computation hydraulics has been found to be promising and warrants further development.更多还原