目前風浪數值模式中的相位平均模式無法描述波浪受透水底床效應的影響。為了加強模式應用功能，本文以 Hsu等人 (2005) 提出之WWM (Wind Wave model) 風浪模式為基礎，同時參考Rojanankmthron 等人 (1990) 所提出透水介質之緩坡方程式數值模式，同時引用Isobe (1987) 處理波浪消散之方法，在WWM 動量平衡方程式 (action density equation) 中加入透水底床效應能量消散係數，並用以描述風浪模式考慮透水底床效應的影響。本文以兩種透水底床實驗配置進行模式驗證，同時探討不規則波浪在不同情況下的減衰率係數的變化。本文同時利用台灣西部海域五個代表性近岸淺水區域來分析考慮透水底床效應的影響，由數值計算結果發現，在台灣西部近岸 (水深小於10公尺) 波浪受透水底床效應影響時造成波高減衰。

The current phase-average wind wave model (WWM) does not include the effect of porous bed on wave energy dissipation. To enhance the model practical applications, the present thesis incorporates the dissipation coefficient for porous bed in the action density equation of WWM model. The coefficient is obtained from the analysis mild-slope equation proposed by Rojanankmthron et al. (1990), and imitated Isobe (1987) method to add the effect of porous bed in the WWM model. Two tests were performed to validate the model skills. Wave decay due to variations of different parameters was investigated. Five typical real sites were investigated using the present model. Numerical result show that the wave decayed by the effect of porous bed in the west near shore (depths less 10 meters) of Taiwan.

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