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| 題 名 | 臺灣西部典型小型獨立河溪之感潮河段特性觀測研究=Observational Study of Tidal Influence Characteristics in Typical Small Independent Streams in Western Taiwan |
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| 作 者 | 錢樺; 張煥盟; 陳昱安; 劉育甫; | 書刊名 | 海岸及海洋工程學刊 |
| 卷 期 | 19:1 2023.11[民112.11] |
| 頁 次 | 頁71-86 |
| 分類號 | 351.81 |
| 關鍵詞 | 感潮河段; 獨立溪; 海岸帶環境; 河口水動力; Tidal river; Independent streams; Coastal zone environment; Estuarine hydrodynamics; |
| 語 文 | 中文(Chinese) |
| DOI | 10.6266/JOCOE.202311_19(1).0007 |
| 中文摘要 | 台灣細小河溪其集水區與大河水系互不相連者在海岸帶形成獨立河入海,這些小型獨立河溪, 單一集水區面積雖僅限於十幾到幾十平方公里,但累計起來,實際上約占了台灣全島面積的一半, 且在西部海岸往往成為工業污水放流水注入口,水體中富含人為營養鹽與污染物,影響周邊近岸 海域的棲地環境。掌握這些小型獨立河口動力在潮汐中的變化,對於瞭解人為物質在近海的輸送 與擴散相當重要。本研究以桃園海岸五條小型獨立河溪為例,進行其感潮河段特性的觀測研究,針 對大堀溪、觀音溪、小飯壢溪、新屋溪和社子溪等河口,進行一年的水位、鹽度、溫度、流速等觀測。 觀測方式包括歐拉式溫鹽深度儀站與拉格朗日漂流浮球和無人船,記錄沿河道之水位、流速與鹽 度分布的時變特性。並與潮位資料進行相關分析,據以提出小型河溪感潮河段範圍的判定方式,結 果發現,感潮河段之內,水體鹽度的變化與距出海口的距離呈現 S 型關係,可以透過擬合 S 型函數 (Sigmoid Function) 來計算河川在不同位置海水與淡水的比例。本文提供了一份桃園海岸包含感潮 範圍、感潮河段與出海口的距離,以及淡水與海水的比例等重要參數的對照表,可以作為未來河川 環境管理和保護策略的參考。 |
| 英文摘要 | Small independent streams in Taiwan, whose catchment areas are not connected to major river systems, form unique river outlets along the coastline. These small independent streams, with individual catchment areas ranging from tens to dozens of square kilometers, actually account for approximately half of Taiwan’s total land area. Often found along the western coast, these streams serve as the inflow points for industrial wastewater, which is rich in anthropogenic nutrients and pollutants, affecting the habitat environment of nearby coastal areas. Understanding the dynamics of these small independent estuaries in response to tidal forces is crucial for comprehending the transportation and diffusion of human-made substances in nearby seas. This study observes the tidal characteristics of five small independent river streams along the Taoyuan coast, including Daku Creek, Guanyin Creek, Xiaofanli Creek, Xinwu Creek, and Shezi Creek. The observation period spanned a year, capturing data on water levels, salinity, temperature, and flow velocity. The methodologies employed include Eulerian temperature-salinity-depth stations, Lagrangian drift buoys, and unmanned boats. These instruments recorded the temporal variations of water levels, flow velocities, and salinity distributions along the river channels. Through a correlation analysis of river water levels and tides, the research proposes a method to determine the range of tidal influence in small streams. Further investigation revealed an S-shaped relationship between the salinity variations and the distance from the river mouth within the tidal influenced section. This relationship can be quantified by fitting an S-shaped function (Sigmoid Function) to calculate the proportion of seawater to freshwater at different positions within the river. The findings provide a comprehensive understanding of tidal influence ranges, distances between tidal sections and the river mouths, and the proportions of freshwater to seawater along the Taoyuan coast. This information serves as a valuable reference for future river environment management and conservation strategies, particularly in regions where industrial wastewater discharge affects coastal ecosystems. |
本系統中英文摘要資訊取自各篇刊載內容。