大鵬灣位於台灣西南部，為一個淺水的潟湖海岸環境，目前僅由一個潮口與外海連接，藉由漲退潮的水體交換，將灣內的水帶出外海，各種營養鹽是否在灣內逐漸累積，而使得優氧化情形日益嚴重，為重要之課題。
本研究利用數值模式POM (Princeton Ocean Model)模擬大鵬灣的環流情況及該區域長期物質傳輸。此外利用拖曳式ADCP觀測大鵬灣空間的流場分佈情形，並且在潟湖內，安裝一組海流儀，定點觀測流速約十五天，幫助我們更加瞭解大鵬灣的流場。模式驗證顯示模式結果與實測資料大致相符。
本研究以高解析度的數值模式，計算大鵬灣潟湖水體交換問題，模式驅動力為潮汐及北風或南風，結果顯示，潮汐作用以潮口附近最為明顯，潮口退潮流最大可達到1 m/s；漲潮流為0.5 m/s。潟湖內部低頻運動主要以風驅流場為主。吹北風時平均餘流約為0.03 m/s，而吹南風時平均餘流為0.05 m/s。一般來說，在湖的南方之平均的滯留時間為30天以上，湖內的中央之平均的滯留時間約為7~10天，在潮口附近之平均的滯留時間約為1~2天。

Ta-pong Bay is a shallow coastal lagoon located at the southwestern Taiwan, with only one inlet permanently connecting to the sea. The water exchange, flowing out or into the Bay, is chiefly driven by tidal force. Many kinds of nutrition are gradually accumulated in the Bay, leading to the situation of eutrophication to be more serious.
This research utilizes the POM numerical model (Princeton Ocean Model) to simulate the circulation of Ta-pong Bay and long-term water mass transportation. Further, we had used a towed ADCP to survey the flow fields of the Bay and set up a fixed ADCP to measured local velocity for 15 days, for helping us more to understand the flow field.
This study using high-resolution 3-D numerical model had been developed with 50m by 50m horizontal resolutions to calculate the problem of water exchange of the lagoon. The model is driven by tidal force, northerly and southerly wind stress. The model results show that the tide-generated force is quite revealed at the tidal inlet where the biggest velocity can researches to 1 m/s during ebb tide, 0.5 m/s during flood tide. The low-frequency motion of the bay is mainly driven by wind stress. The residual current is about 0.03 m/s during blowing northerly wind and about 0.05 m/s during blowing southerly wind. Generally speaking, the average residence time in the south of the lagoon is over 30 days and in the central bay is about 7~12 days and in the north of the lagoon near the tidal mouth is about 1~2 days.

誌謝……………………………………………………………………I
中文摘要………………………………………………………………II
英文摘要………………………………………………………………III
目錄……………………………………………………………………IV
表目錄…………………………………………………………………VI
圖目錄…………………………………………………………………VII
第一章緒論……………………………………………………………1
1.1前言…………………………………………………………1
1.2 研究區域…………………………………………………6
1.3海氣象資料…………………………………………………8
1.4研究目的…………………………………………………10
第二章文獻回顧…………………………………………………….11
(一)前人在大鵬灣的相關研究…………………………………11
(二)潟湖之滯留時間相關研究…………………………………17
第三章數值模式介紹………………………………………………23
3.1 POM介紹………………………………………………23
3.2運動控制方程式及邊界條件…………………………24
3.2.1控制方程式…………………………………….24
3.2.2座標介紹……………………………………….29
3.2.3邊界條件……………………………………….31
3.2.4大鵬灣數值模式建立與邊界條件設定……………………35
3.3大鵬灣環流模式驗證…………………………………………39
第四章結果與討論………………………………………………43
4.1潮汐-混合潮………………………………………….44
4.2風應力的效應……………………………………………50
4.2.1風應力-北風………………………………………50
4.2.2風應力-南風………………………………………57
4.3利用模式中性質點漂流計算滯留時間…………………77
4.3.1實驗A的模式中性質點漂流軌跡……………78
4.3.2實驗B的模式中性質點漂流軌跡…………………81
4.3.3實驗C的模式中性質點漂流軌跡…………………84
4.4大鵬灣滯留時間研究……………………………………90
4.5風驅效應對於潟湖水位之影響…………………………93
第五章結論……………………………………………………94
參考文獻………………………………………………………96
英文部分…………………………………………………96
中文部分………………………………………………………101

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