生態農業：自然解方修復極端氣候退化坡地之生態地景【水土保持學系/馮正一教授、陳樹群特聘教授】
| 論文篇名 | 英文：Characterization of Seismic Signal Patterns and Dynamic Pore Pressure Fluctuations Due to Wave-Induced Erosion on Non-Cohesive Slopes 中文：波浪引起的非凝聚性斜坡侵蝕對地震信號模式特徵及動態孔隙壓力波動的影響 |
| 期刊名稱 | Applied Sciences |
| 發表年份,卷數,起迄頁數 | 2024, 14(19), 8776 |
| 作者 | Feng, Zheng-Yi(馮正一); Wu, Wei-Ting; Chen, Su-Chin(陳樹群)* |
| DOI | 10.3390/app14198776 |
| 中文摘要 | 坡面的波浪侵蝕很容易引發崩塌進入海洋環境，對生態環境和人類活動構成嚴重威脅。因此，近岸坡面監測對於防範和預警這些潛在災害至關重要。為了全面了解波浪侵蝕對坡面的作用動態，有必要對侵蝕過程進行詳細研究。本研究通過水槽試驗進行，使用造波器產生不同高度和頻率的波浪來侵蝕坡面模型。在試驗過程中，記錄了由波浪侵蝕和坡面破壞引發的地震信號、聲學信號和孔隙壓力。地震信號和聲學信號被分析，並使用Hilbert–Huang變換計算時頻譜，以識別侵蝕事件和信號的頻率範圍。Arias強度被用來評估地震能量，並探索侵蝕量與能量之間的關係。結果顯示，波高對侵蝕行為和坡面後退的影響比波浪頻率更為決定性。快速水位下降可能會在週期性波濺和回浪作用下導致坡面滑動。當波浪侵蝕從波濺轉變為衝擊時，地震和聲學信號的頻譜幅度和功率譜密度（PSD）顯著增加。隨著波浪高度的上升，觀察到孔隙壓力的增加，並且隨著坡面進一步受到侵蝕，孔隙壓力的幅度也會增大。理解這項研究的結果有助於預測侵蝕，並為波浪作用下的坡面規劃有效的管理策略。 |
| 英文摘要 | Wave erosion of slopes can easily trigger landslides into marine environments and pose severe threats to both the ecological environment and human activities. Therefore, near-shore slope monitoring becomes crucial for preventing and alerting people to these potential disasters. To achieve a comprehensive understanding, it is imperative to conduct a detailed investigation into the dynamics of wave erosion processes acting on slopes. This research is conducted through flume tests, using a wave maker to create waves of various heights and frequencies to erode the slope models. During the tests, seismic signals, acoustic signals, and pore pressure generated by wave erosion and slope failure are recorded. Seismic and acoustic signals are analyzed, and time-frequency spectra are calculated using the Hilbert–Huang Transform to identify the erosion events and signal frequency ranges. Arias Intensity is used to assess seismic energy and explore the relationship between the amount of erosion and energy. The results show that wave height has a more decisive influence on erosion behavior and retreat than wave frequency. Rapid drawdown may potentially cause the slope to slide during cyclic swash and backwash wave action. As wave erosion changes from swash to impact, there is a significant increase in the spectral magnitude and Power Spectral Density (PSD) of both seismic and acoustic signals. An increase in pore pressure is observed due to the rise in the run-up height of waves. The amplitude of pore pressure will increase as the slope undergoes further erosion. Understanding the results of this study can aid in predicting erosion and in planning effective management strategies for slopes subject to wave action. |
| 發表成果與本中心研究主題相關性 | 農村地區邊坡穩定的分析 |
