A multi-directional irregular wave transformation mathematicalmodel taking into account refractin，diffraction，breaking，bottom friction due to complex topography and islands is set up, and numerical calculations of wave field due to incident wave from out sea are carried out.%建立了考虑复杂地形造成的折射、绕射、底摩擦波能损失、波浪破碎及岛屿影响的多向不规则波传播变形的数学模型，对瓯江口海区外海传入波浪的波浪场进行了数值计算。
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