采用改进的盐度场数值格式模拟珠江口盐度分层现象

SIMULATION OF SALINITY STRATIFICATION IN ZHUJIANG RIVER ESTUARY USING MODIFIED SALINITY NUMERICAL FORMAT

采用基于Backhaus的三维斜压模式计算珠江口水动力特性,重点模拟了夏季丰水期盐度分层现象;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?结果表明,改进后的盐度差分方程能较好地反映珠江口盐度成层现象?

Based on Backhaus' three-dimensional baroclinic model,this paper computed the hydrodynamic characteristics of the Zhujiang River Estuary,and focused on the simulation of its salinity stratification in summer.Modifying difference format and equations of original model,the present model used second order accurate difference format and added the term of physical diffusion.The calculated results showed that the modified salinity difference equations reflected well the phenomenon of salinity stratification in the Zhujiang River Estuary