桃園海岸近岸流之數值模擬 - 臺灣聯合大學博碩士論文系統

長久以來，科學家們都認為近岸流場對於物質傳輸過程扮演了重要的角色，而近岸流亦會受到地形、季侯風、潮汐和波浪的影響。

在台灣海峽，前人對於此研究的著墨甚少。

資料載入處理中... 網站地圖| 首頁| 本站說明| 聯絡我們| 圖書館首頁| 常見問題| 網路資源| 操作說明| 表單下載| English 簡易查詢 進階查詢 論文瀏覽 熱門排行 我的研究室 上傳論文 查詢審核進度 帳號：guest(178.128.221.219)          離開系統 字體大小：       詳目顯示 第1筆/ 共1筆  /1頁 以作者查詢圖書館館藏、以作者查詢臺灣博碩士、以作者查詢全國書目、勘誤回報 論文基本資料 摘要 外文摘要 目次 參考文獻 全文 作者:廖凱芹作者(外文):Khai-JingLiew論文名稱:桃園海岸近岸流之數值模擬論文名稱(外文):NumericalsimulationofnearshorecurrentalongTaoyuancoast指導教授:黃志誠指導教授(外文):Zhi-ChengHuang學位類別:碩士校院名稱:國立中央大學系所名稱:水文與海洋科學研究所學號:104626601出版年:107畢業學年度:106語文別:英文論文頁數:61中文關鍵詞:近岸流、突堤效應、藻礁外文關鍵詞:nearshorecurrent、forcingmechanism、jettyeffect、algalreef相關次數: 推薦:0點閱:206評分:下載:35收藏:0 長久以來，科學家們都認為近岸流場對於物質傳輸過程扮演了重要的角色，而近岸流亦會受到地形、季侯風、潮汐和波浪的影響。

在台灣海峽，前人對於此研究的著墨甚少。

在另一方面，桃園海岸擁有全台最大的藻礁地形－觀新藻礁。

因此，本研究希望（一）透過近岸數值模式(Delft3d)搭配現場觀測資料來探討桃園海岸，尤其是觀新藻礁區域的近岸流的時空變化，（二）探討結構物對近岸流的影響。

本研究在夏季時期一共佈置了三臺聲學度普勒流速儀(ADCP)以進行為期四週對波浪及海流的觀測。

在模式方面，經過仔細調整曼寧參數及碎波參數後，所使用的近岸數值模式亦成功重建研究區域之流場及水文型態。

本研究結果發現，靠近結構物（觀新藻礁區域）的近岸流呈現向西北-北方流的現象。

而在遠離結構物（非觀新藻礁區域），近岸流則持續性流向東北方。

除此之外，模式分析結果顯示，由於結構物的關係，在觀新藻礁區漲潮時期會產生一逆時針渦流。

由於該渦流的關係，觀新藻礁區域裡風場、潮流及波浪之間的交互作用也變得相對複雜。

另一方面，在遠離結構物的區域，近岸流主要受到西南季侯風的影響而持續性流向東北方。

整體而言，桃園海岸的近岸流特性在空間分佈上有顯著的分別。

有別於以往的發現，本研究顯示風場在桃園海岸近岸流扮演了重要的角色。

Nearshorecurrentsareimportantformaterialdispersionandsedimenttransport,yet,notwellunderstoodinTaiwanStraitwherecomplicatedforcingmechanismssuchasinfluencefromtopography,tide,wind,waves,andlarge-scalecurrentexist.ThisstudywasconductedalongTaoyuancoastusingbothnumericalmodel(Delft3d)andobservationaldata.ThreeAcousticDopplerCurrentProfilers(ADCPs)weredeployednear-coastfromJune-Julytoinvestigatespatialvariationsofthecurrentpattern.Themodelcurrentwasperformedunderdifferentforcingconditions(withandwithoutwind,tide,andwave)withvariousparameterstoexamineitssensitivity.ResultssuggestedthattheManningcoefficientandbreakingindexarethetwomostdominantfactorsaffectingsimulationperformanceforFlow-moduleandWave-modulerespectively.Predictedwaterlevelandcurrentvelocityareingoodagreementwithfieldobservationswithaveragedmodelskillupto0.8.Basedontheresults,currentpatternalongTaoyuancoastdisplaysremarkablespatialinhomogeneity.CurrentflowinaregionfarawayfromthestructurewasstronglyinfluencedbywindforcingandalwaysdirectedtonortheastwardduringtheSouthwesterlymonsoonperiod.Meanwhile,currentflowatregionclosetothestructureisprimarilyassociatedwithwaveforcing.Inthisregion,ananti-clockwiseeddyisgeneratedduetotheexistenceofcoastalstructure.Theformationofeddycausecomplexinteractionoftide,windandwave-drivencurrentthatoccasionallyoffseteachother.Furtherstudyisrequiredinordertoclarifytheinfluenceofeddytowardlocalhydrodynamic.Thisstudyisimportantthatcanenhanceunderstandingofnearshorecurrentpatternatalgalreefregionwhichcanaidinfuturereefconservation. 摘要iiAbstractiiiAcknowledgementivTableofContentvListofFiguresviiListofTablesixChapter1:Introduction11.1Overviewofreef11.2ReefdistributioninTaiwan21.3Significancesofstudy31.4Objectivesofstudy3Chapter2:Literaturereview4Chapter3:Methodology73.1Sitedescription73.2Fieldmeasurement83.3Modeldescription83.4Modelconfiguration10Chapter4:Results174.1Observations174.2Modelvalidation184.3Physicalforcinganalysis20Chapter5:Discussion38Chapter6Conclusion45References47 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