二維河口海域地形變遷模式之研究

本文建立一水深平均二維河口海域地形變遷模式，以探討河口及鄰近海域長時間下之地形變遷。為驗證模式之精確性與實用性，本文實地進行水工模型試驗，以現場實際地形鋪設模型，波浪與潮位條件亦採用現場觀測結果，試驗案例包括冬季波浪、夏季波浪與颱風波浪，以供模式之模擬比對。由模擬結果與試驗結果之比較可得知，在三種波浪條件下模式與水工試驗所得之河口海域地形變遷結果，除外海較深處之沖淤較無法模擬及局部區域之模擬結果與試驗結果略有差異外，其餘區域之地形變遷趨勢均相似。因此模式對河口及鄰近海域地形變遷之模擬，具有實用性與合理性，可供工程或規劃設計之參考。

關鍵字

河口海域地形變遷；水工模型試驗；二維數值模式

並列摘要

The study is aimed at developing a two-dimensional depth-averaged numerical model for bed evolution in the estuary-sea area, and, moreover, at simulating the long-term morphological change in the estuary and the nearby sea. To evaluate accuracy and practicability of the numerical simulation, physical hydraulic model experiments were performed. Waves in three scenarios, a summer period, a winter period, as well as a typhoon period, were adopted experimentally. Design conditions of the physical model were based on field observation of waves, tides, and bed elevation. Overall, the experimental results agree with those of the numerical simulation except those in deeper sea and some local regions. We conclude that the numerical model is applicable and reasonable for simulating the bed evolution in the estuary-sea area for engineering practices on construction planning and design.

並列關鍵字

bed evolution in estuary-sea area ； physical hydraulic model experiment ； two-dimensional numerical model

國際替代計量

二維河口海域地形變遷模式之研究

全文下載

主題瀏覽