2013-07-252024-05-17https://scholars.lib.ntu.edu.tw/handle/123456789/682232摘要：國內水庫淤砂問題， 似有日趨嚴重的趨勢。而台灣諸多有淤砂問題的水庫，又屬石門水庫資料最齊全，因此，以它作為學術探討的驗證與應用先驅對象，應是極自然的選擇。緣此，本研究旨在發展解析水庫泥砂運移歷程的分析工具，庫區異重流運移模擬計採用三維模式，探討庫區泥砂分佈情形。此外，數值模式結合現場實測資料檢定相關參數，配合石門水庫防洪防淤可行性規劃案進行模擬分析，搭配物理模型進行檢定驗證。其中考量物理模型相似律檢定，包括試驗不同比重之模型用砂與不同粒徑組成對模擬水庫防淤功能之影響程度。同時藉由數值模式快速模擬特性，減少物理模型試驗組數、時間及經費；緊密結合現場觀測、數值模型及物理模型試驗，提供石門水庫全洪程即時運轉操作之依據，希冀可提供相關單位防淤之參考數據。<br> Abstract: Over more recent years, siltation in reservoirs seems to become a prominent problem in a number of countries. Concerning the associated problems in Taiwan, the available survey-based data obtained from the Shih-Men Reservoir are of sufficient quality. Consequently, the Shih-Men Reservoir, a very natural choice for theoretical validation and practical application, may be served as a plausible and pioneering benchmark case. In light of this, the aim of this research is to develop an effective analysis tool for evaluating the duration of sediment transport in reservoirs. In the present modeling approach, while the three-dimensional (3-D) model is employed to explore the movement of density current in the reservoir. The 3D model was further developed to more reasonably deal with bed boundary condition. Physical model expriment and storm events including the one added this year were simulated to verify the development. The 3D model after some refinement will continue to serve as major tool to investigate the model similariy for the results of physical model test.水庫物理模型水庫操作reservoirphysical modelreservoir operation