桃園海岸近岸流四季變化之研究

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姓名

林伯謙(Po-Chien Lin) 查詢紙本館藏

畢業系所

水文與海洋科學研究所

論文名稱

桃園海岸近岸流四季變化之研究
(Seasonal variation of nearshore currents along Taoyuan coast)

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摘要(中)

本研究旨在探討台灣桃園海岸近岸流四個季節的變化桃園擁有全台灣最大且最完整的藻礁海岸，近岸流又對於物質的傳輸扮演個很重要的角色，故近岸流的研究在此區域就相對重要，但前人對於此研究著墨甚少。近岸流亦會受到地形、潮汐、季風及波浪等因素所影響，因此為瞭解近岸流的變化，本研究在四個季節當中於實驗區域擺設一台聲學都普勒流速剖面儀 (ADCP)，每季進行至少兩週以上之波浪及海浪觀測，利用Delft 3d近岸數值模式成功模擬研究區域四個季節之流速及水位狀況。前人研究認為台灣海峽的海流主要受潮流所影響，因此，我們討論未去除潮流的近岸流全成份流(nearshore current of total forcing)與去除潮流成分的潮汐殘差流(residue current)。此潮汐殘差流的計算方式為，透過觀測到的近岸全成份流減去模式模擬之潮流結果。結果發現: 1. 研究區域的沿岸近岸流全成份流主要和潮汐相關，但當東北季風開始盛行時，沿岸近岸流全成份流則會和沿岸風有極高的相關性。2. 研究區域的沿岸潮汐殘差流四個季節皆與風場有高相關性。但在秋季、冬季的沿岸潮汐殘差流除了和風場有高的相關性外，也會和輻射應力有高的相關性。

摘要(英)

This study aims to investigate the seasonal variation of the nearshore currents in the coastal zone of Gunging, Taoyuan city. It has the largest and most complete algal reef along Taoyuan coastal in Taiwan. And the sediment transport is affected by the nearshore current. Then the nearshore current research is most important. In order to understand the seasonal variation of nearshore current, we deployed the Acoustic Doppler Current Profiler (ADCP) in the experimental area once a season, and observed the variation of the current and wave for at least two weeks. We also used the numerical model (Delft3d) to simulate the current velocity and the water level. The previous research has indicated that currents in the Taiwan straits is influenced by the tidal current. Therefore, we discuss the nearshore current of total forcing and the residue current (detide). The calculation of the residue current was computed by the observation data (nearshore current of total forcing) minus the simulation result of the tidal current. The result has shown that (1) It has high correlation between the longshore of nearshore current of total forcing and the tide. But when the northeast monsoon gets strong the effect of longshore is more than the tide. (2) The longshore of residue current is strongly correlated with the along shore wind in the experimental area during the whole year. The longshore of residue current also has high correlated with the radiation stress in fall and winter.

關鍵字(中)

★ 桃園海岸
★ 近岸流
★ 潮汐殘差流

關鍵字(英)

論文目次

摘要 i
Abstract ii
謝誌 iii
目次 iv
圖次 vi
表次 ix
第一章緒論 1
1.1 前言 1
1.2 研究動機 2
1.3 文獻回顧 3
1.4 本文架構 7
第二章實驗設備與現場佈置 10
2.1 實驗設備 10
2.2 現場佈置 11
2.3 量測過程 11
第三章理論背景與分析方法 15
3.1 理論背景 15
3.2 分析方法 16
3.3 模式簡介 19
第四章結果與討論 28
4.1 基本水文特性 28
4.2 模式結果 31
4.3 近岸流之季節特性 32
第五章結論與建議 56
5.1 結論 56
5.2 建議 57
參考文獻 58

參考文獻

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指導教授

黃志誠(Zhi-Cheng Huang)

審核日期

2018-7-27

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