长江口波浪折射绕射数值模拟

Numerical Simulation for the Combined Refraction-diffraction of Waves at the Yangtaze Estuary

在长江口波浪推算中使用扩展抛物型缓坡方程对波浪折射绕射进行数值模拟。由于扩展抛物型缓坡方程中保留了表征底部曲率（≈ ２ｈ）和较高阶的底坡顶，对较浅水域和存在浅滩的长江口区域波浪推算效果较好，数值模拟过程稳定。

An extended parabolic mild--slope equation is used for solving refraction--diffraction of waves at the Yangtze Estuary. The results are compared with those from the general parabolic mild--slope equation.