盐场高度分层下的三维斜压数值模拟

Study of Hydrodynamic Characteristics Given the High Salinity Stratification in the Pearl River Estuary

采用基于 Backhaus 的三维斜压模式计算珠江口水动力特性?改进了原模式的盐度差分格式和方程,采用二阶精度差分格式并引入了物理扩散项?改进后盐度差分方程能较好地反映珠江口盐度成层现象?本文给出了两个点的水位数值模拟与实测值的对比,给出了包含 8 个口门珠江口的计算潮流场及盐场,讨论了盐度高度成层条件下珠江河口水动力特性?

Based on Backhaus' three-dimensional baroclinic model,this paper computes the water dynamical characteristic in the Pearl River Estuary. Modifying the salinity difference format and salinity equations of the original model,the present model uses the second-order accurate difference format and introduces the term of physical diffusion. The modified salinity difference equations report well the phenomenon of salt stratification in the Pearl River Estuary. The simulated and observed water levels are contrasted at two sites. The current field and salinity field in the Pearl River Estuary with 8 estuarine mouths are showed. Hydrodynamic characteristics given the high salinity stratification are discussed