跳到主要內容

臺灣博碩士論文加值系統

(44.200.27.215) 您好!臺灣時間:2024/04/13 17:39
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

我願授權國圖
: 
twitterline
研究生:廖克恆
研究生(外文):LIAO,KEH HENG
論文名稱:高屏海域擴散特性之研究
論文名稱(外文):A study of diffusive characteristics in Kaohsiung and Pingtung coastal waters
指導教授:曾若玄曾若玄引用關係
指導教授(外文):TSENG,RUE SHAN
學位類別:碩士
校院名稱:國立中山大學
系所名稱:海洋資源學系
學門:自然科學學門
學類:海洋科學學類
論文種類:學術論文
論文出版年:1995
畢業學年度:83
語文別:中文
論文頁數:62
中文關鍵詞:紊流擴散係數離散係數長度尺度浮標
外文關鍵詞:Eddy diffusivityDispersion coefficientLength scaleDrifter
相關次數:
  • 被引用被引用:0
  • 點閱點閱:168
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
本研究是於民國83年9月到84年4月於屏東後灣及高雄附近海域進行數次浮
標飄流監測調查實驗,並配合兩個錨碇式海流儀資料及船碇式杜卜勒剖流
儀(ADCP)的觀測結果,以瞭解當地海域的擾流與擴散特性。每次實驗同時
施放並追蹤2道4個表層浮標,浮標定位的方式的方式有兩種,第一種是以竹
筏尾隨浮標並以GPS定位,第二種是由海研三號的雷達與GPS在距離浮標大
約1浬範圍內定位浮標的飄流軌跡與ADCP和海流儀的行進向量圖計算結果
相似,由浮標的飄流軌跡可求得離散係數與紊流擴散係數,並與海流儀的資
料所推算的 Eulerian結果互相比較。實驗結果顯示,海流儀所計算出的離
散係數值較浮標的平均離散係數值為大。高雄外海地區的渦度長度尺度應
介於1km到 2km之間,當長度尺度大於此數值時,離散係數與擴散係數將會
大增。擴散係數約為0.3m2/s到0.8m2/s之間,擴散係數與長度尺度成4/3次
方的正比關係,這與Okubo(1971)的結果大致符合。
Several drifter experiments were conducted at coastal seas off
Howan and Kaohsiung, both are located at southwestern Taiwan.
In addition, data of two nearby moored current meters and
shipboard ADCP were also analyzed to study the turbulent and
diffusive characteristics. In each experiments 2 to 4 surface
drifters were released and tracted with two different methods.
The first method is simply to closely follow the drifter by a
small boat and then determine its position by a GPS. Drifters
were tracked in the second method by R/V Ocean Research Ⅲ with
the ship-borne radar and GPS. The results indicate that drifter
trajectories are consistent with progressive vector diagrams
calculated from ADCP and current meter data. Both Lagrangian
and Eulerian estimates of dispersion and diffusion coefficients
were made. It is found that dispersion coefficient obtained
with current meter data is greater than that with drifter data.
The diffusion scale of length ranges between 1km and 2km, and
the eddy diffusivity ranges between 0.3 and 0.8 m2/s in
Kaoshiung areas. The dispersion and diffusion coefficients
increase rapidly beyond this length scale. Finally,
diffusivities increase with the length scale at the 4/3 power
law, which agrees mostly with Okubo''s (1971) results.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top