為了保護海岸避免海岸侵蝕，本研究以柔性保護工法的概念，接續著前人柔性減能網的相關研究。本文主旨為利用模型試驗研究規則波通過各種配置的柔性減能網，模擬在波浪作用下侵蝕型海灘剖面之海岸斷面變遷，及分析波高衰減量及其輸沙運移特性。本試驗於國立成功大學水工試驗所進行，試驗主要在分析各種配置的柔性減能網周圍之漂沙落淤變化。其中波浪條件的改變包括進行不同的週期、波高組合(波浪尖銳度)、水位(相對水深比)等條件，以研析漂沙落淤量及海灘剖面坡度變化之差異。
根據前人的文獻分析結果，尖銳度增加則整體碎波能量損失增加，對海灘的侵蝕量也增加，而在建立柔性減能網模型後，其侵蝕效果能得到相當大程度的改善，但同時也會造成柔性減能網的堤前掏刷問題。本研究透過資料收集、實驗設計、建立不同試驗模型配置的方式，以系列潛堤的概念設計出潛沒式柔性減能網及系列柔性減能網，綜整分析入射波浪尖銳度、底層泥沙之間的交互作用機制，以瞭解侵蝕海岸可能的輸沙運移的方向與途徑，並有準確的地形測量結果，提供建立最佳化配置的柔性減能網模型的依據。
最後並由實驗結果得知，與無建置柔性減能網時相比，柔性減能網後囚沙高度差異最大約達到29%，潛沒式柔性減能網後差異最大約達到24%及系列柔性減能網後差異最大約達到25%。而柔性減能網前侵蝕深度差異最大約達到16%，潛沒式柔性減能網前差異最大約達到12%及系列柔性減能網前差異最大約達到13%。而在大部分情況下，柔性減能網在週期較長的情況下之消波效果較差；在初始波高較高的情況下，消波效果也會降低，同時濁度的減少也變得較少。此外，當水深增加時，減能網的消波效果也會變差，並且濁度的降低程度也會減少。綜言之，各種配置的柔性減能網於侵蝕型海灘皆能提供改善及保護效應，且潛沒式柔性減能網及系列柔性減能網皆能減緩柔性減能網堤前掏刷的現象。

This study, building on earlier Derosion Lattice research, employed a soft protection approach to safeguard coastlines from erosion. Its main objective was to investigate how regular waves interacted with various Derosion Lattice configurations, simulating changes in eroded beach profiles under wave action and analyzing wave height dissipation and sand transport. Experiments were conducted at the Tainan Hydraulics Laboratory, National Cheng Kung University, primarily focusing on sedimentation around Derosion lattice configurations. Wave conditions, including periods, wave height combinations, and water levels, were varied to analyze sediment deposition and beach profile changes.
According to the results of earlier literature, an increase in wave steepness leads to an increase in the overall energy loss of the breaking wave and even an increase in the amount of erosion on the beach. After modeling the Derosion Lattice, the coastal erosion problem could be considerably improved. At the same time, it also caused a problem of front scouring of the dike in the Derosion Lattice. In this study, the concept of a series of submerged breakwaters was used to design the Submerged Derosion Lattice and the Series Derosion Lattices using data collection, experimental design, and establishment of different experimental model configurations. Through a comprehensive analysis of wave steepness and bottom sediment interaction, this study aimed to clarify the direction and pathway of potential sand transport in coastal erosion scenarios. Combined with correct topography measurements, it provided the basis for modeling the Derosion Lattice in an optimally configured configuration.
In conclusion, compared to no modeling, the maximum bottom elevation differences after Emerged Derosion Lattice, Submerged Derosion Lattice, and Series Derosion Lattice models are 29%, 24%, and 25% respectively and the amount in front of Emerged Derosion Lattice, Submerged Derosion Lattice, and Series Derosion Lattice models are (-16%), (-12%), and (-13%). The trend across all Derosion Lattice configurations indicates weaker wave height dissipation effectiveness with longer wave periods, decreased effectiveness with higher initial wave heights, and diminishing effectiveness with increased water depth, leading to lower turbidity reduction. various configurations can provide improvement on eroded beaches, and both submerged Derosion Lattice and series Derosion Lattice can mitigate scouring in front of the Derosion Lattice.

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