現今國內海岸地區規劃已朝向「安全」、「景觀」、「生態」、「親水」四方面並行。海岸保護措施逐有以進行人工岬灣及人工養灘等柔性、近自然工法。颱風侵襲時，暴潮巨浪在短時間內吞噬海岸，造成海灘灘線後退與破壞後灘，為現今海岸侵蝕主要因素之ㄧ。
　　本研究以二維海灘剖面變遷模式SBEACH（Storm induced BEACH
changes）模擬美國陸軍海岸工程研究中心（CERC）大型波浪水槽（LWT）試驗之資料，率定模式與探究參數影響剖面趨勢；再以德國Hannover大學的Grosser Wellen Kanal (GWK)大型波浪水槽實驗結果，驗證模式之精確性；最後利用前中華顧問工程司（2006）在屏東大鵬灣青洲遊憩區相關規劃研究報告中所使用不同重現期（即10、20及50年）的颱風波浪資料，後灘濱台高程2.5公尺、寬度100公尺，剖面坡度為1:25之單一遞減原始剖面，進行一系列模擬與結果之迴歸分析。探討不同強度颱風作用下灘線後退距離及離岸沙洲位置之預測，研擬一適當安全的海灘緩衝帶寬度。
研究結果顯示，SBEACH模擬結果在灘線後退距離及離岸沙洲頂部位置符合LWT與GWK大型波浪水槽試驗之結果。模式主要參數：傳輸率係數K值主要控制整體漂沙多寡；坡度相關項數ε值主要控制平衡剖面的坡度及離岸沙洲部份；波能消散係數Kb值主要控制灘線侵蝕量；碎波陸側深度db值主要控制海岸後灘剖面。由模擬不同重現期颱風作用單一斜率剖面之結果，迴歸分析出無因次化灘線總後退量Xt/L0與深海波浪尖銳度H0/L0有良好的線性關係，並利用所得之線性迴歸式，估算不同強度颱風作用海灘所需最少海灘緩衝帶之寬度。

The coastal planning has been developed in purpose of the “safely”, “landscaping”, “ecology” and “water affinity” in Taiwan nowadays. Moreover, the hendland bay beachs and beach nourishment have been hailed for the protection of shoreline. One of the main affection of erosion is a storm, which retreads shoreline and reduces nearshore by storm surge.
This essay reports an application of 2-D SBEACH software to simulate the beach profile changes. The data of large wave tank (LWT), which tests by the Coastal Engineering Research Center (CERC), US Army Corps of Engineers, is used to calibrate the parameters by SBEACH. Then, using the results of experimentation to indicate the accuracy of model from Grosser Wellen Kanal (GWK), which tests by the University of Hannor. Finally, simulating beach profile, with a berm (height of 2.5m and width of 100m) and a slope of 1:25, is used to simulate the profile changes and analyze the results by different storm conditions from CECI. The purpose of this paper is to estimate the suitable distance of shoreline and location of bar for a beach buffer zone by SBEACH during different storm conditions.
The present study confirms that the simulated results of shoreline erosion rate and the position of bar crest by SBEACH comform to the LWT and GWK experiments. The major parameters of SBEACH, the transport rate coefficient, K influences the sediment transport, coefficient for slope-dependent term, ε controls the slope of beach profile and shape of bar, the transport rate decay coefficient multiplier, Kb affects the shoreline erosion, and the landward surf zone depth, db influences the shape of berm. The result of analysis by SBEACH indicates that a constant slope beach profile changes by different storm conditions and the extent of non-dimensional shoreline retreat Xt/Lo is found in good linear relationship with deepwater wave steepness Ho/Lo. Therefore, the linear regress function is used to compute the less beach buffer zone in different storm conditions.

誌謝 Ⅰ
摘要 Ⅲ
Abstract Ⅳ
目錄 Ⅴ
圖目錄 Ⅶ
表目錄 Ⅸ
附錄目錄 Ⅸ

第一章 緒論 1-1
1.1 前言 1-1
1.2 研究動機與目的 1-2
1.3 研究方法與步驟 1-3
1.4 文獻回顧 1-3
第二章 暴浪作用下的海灘變化 2-1
2.1 海灘剖面變化 2-1
2.2 海灘寬度 2-4
2.3 國內外相關經驗法則 2-5
第三章 大型波浪水槽試驗結果 3-1
3.1 大型波浪水槽試驗 3-1
3.2 研究成果 3-3
第四章 海灘變遷的數值模式 4-1
4.1 SBEACH系統簡介 4-1
4.1.1 SBEACH之發展 4-1
4.1.2 SBEACH各項輸入設定之簡述 4-2
4.1.2.1 海灣設定（Reach Configuration） 4-3
4.1.2.2 暴風設定（Storm Configuration） 4-5
4.1.3 SBEACH系統的運算結果與輸出資料 4-7
4.2 SBEACH模式之應用 4-9
4.2.1 SBEACH向、離岸漂砂估算模式 4-9
4.2.2 SBEACH波浪計算模式 4-11
4.2.2.1 模式相容性及使用限制 4-11
4.2.2.2 波浪數值之演算 4-13
4.2.3 SBEACH海灘剖面變化之計算簡介 4-17
4.2.3.1 模式相容性及使用限制 4-17
4.2.3.2 剖面變化之數值計算 4-18
第五章 以SBEACH系統探討海岸緩衝帶之建立 5-1
5.1 SBEACH參數率定與灘線模擬 5-1
5.2 SBEACH模式驗證 5-9
5.2.1 德國實驗案例簡介 5-9
5.2.2 SBEACH模式之輸入設定 5-10
5.2.3 實驗案例與模擬結果之比較 5-11
5.3 不同強度颱風作用下灘線後退距離及離岸沙
洲位置之預測 5-17
5.4 海岸緩衝帶建置 5-25
第六章 結論與建議 6-1
6.1 結論 6-1
6.2 建議 6-4

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