跳到主要內容

簡易檢索 / 詳目顯示

回結果列表
研究生： 鄭年佑
Nian-you Zheng
論文名稱： 淡水河口風吹砂及水下沙丘之特性分析
指導教授： 周憲德
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2015
畢業學年度： 103
語文別： 中文
論文頁數： 84
中文關鍵詞： 淡水河口 、風吹砂 、沙丘 、輸砂
外文關鍵詞： Tamsui Rivermouth, sand spit, aeolian sand transport, sand dunes
相關次數： 點閱：14  下載：0 
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報

    • 本研究針對淡水河口沙嘴的風吹砂及水下沙丘進行現地監測與分析，並探討其形態及輸砂特性。風吹砂效應之研究乃分析風速及影像資料，以了解風場對淡水河口沙丘及灘線的影響，並以α值代表風場均勻之狀態。水下沙丘之型態則以Van Rijn(1984)方法進行分析，並估算沙丘運移距離。風吹砂研究結果顯示以主要風向及各風向均勻度，可判斷出控制沙丘運移之主要風向，於冬季時，風場最為均勻，沙丘運移距離也最大；本研究分析之沙丘運移結果，顯示淡水河口之風吹砂效應是向西南方運移，與灘線之變化趨勢不一致，因此，灘線變遷與風吹砂效應的關聯性不明顯。淡水河底床型態分析結果，顯示底床型態分類屬於沙丘。本研究分別於河口外(A)、河口內(B)兩段進行水下沙丘之測量，A段於8月7日至10月20日平均約向下游運移94公尺，B段於8月7日至10月20日平均約向下游運移65公尺。懸浮載的輸送量大於底床載，且在沙丘波峰處兩者都有較大值出現。

    The aeolian sand transport and subaqueous sand dunes at the river mouth of the Tamsui River are explored in this study. The aeolian sand transport is analyzed based on the wind speeds and dune fronts on the sand spit of the Tamsui Rivermouth. The homogeneous state of the wind field is represented by a coefficient α. The dune forms on the riverbed are classified as lower regime dunes by using Van Rijn (1984) method. The aeolian sand transport are in line with the primary wind directions. In winter, wind field is the most uniform and the distance of sand dune migrated is the longest in the southwest dirction. While the beach line extents in the northeast direction at the same time. So the sand spit is many controlled by wave-induced littoral transport instead of aeolian transport. Two segments of sand dunes on the riverbed were investigated. One is outside the estuary (A) and the other inside the estuary (B). During the period between August 7 to October 20, 2014, the dunes migrated in the downstream direction with the distances of 94 meters and 65 meters, for A and B, respectively. Suspended loads are greater than bed loads and both shows peak values at the dune crests.

    摘要 ..............................................I Abstract ......................................II 致謝 ..............................................III 目錄 ..............................................IV 圖目錄 ..............................................VI 表目錄 ..............................................IX 第一章 緒論 ......................................1 1.1 研究緣起 ......................................1 1.2 研究目的及方法 ..............................2 1.3 論文架構 ......................................2 第二章 文獻回顧 ......................................4 2.1 風吹砂的輸砂特性 ..............................5 2.2 水下沙丘 ......................................9 第三章 研究區域及方法 ..............................13 3.1研究區域 ......................................13 3.2資料收集 ......................................17 3.2.1 風場 ......................................17 3.2.2 流場 ......................................18 3.2.3 沙丘型態 ......................................20 3.3分析方法 ......................................21 3.3.1 沙丘型態及風場 ..............................21 3.3.2 水下沙丘 ......................................22 第四章 結果討論 ......................................23 4.1 夏季風場分析結果 ..............................23 4.1.1 風向、風速分析 ..............................23 4.1.2 風場均勻度(α值)分析結果 ......................26 4.2 秋季風場分析結果 ..............................29 4.2.1 風向、風速分析 ..............................29 4.2.2 風場均勻度(α值)分析結果 ......................33 4.3 冬季風場分析結果 ..............................36 4.3.1 風向、風速分析 ..............................36 4.3.2 風場均勻度(α值)分析結果 ......................39 4.4 春季風場分析結果 ..............................42 4.4.1 風向、風速分析 ..............................42 4.4.2 風場均勻度(α值)分析結果 ......................45 4.5 沙丘輪廓 ......................................49 4.5.1 沙丘輪廓變化 ..............................50 4.5.2 沙丘運移距離 ..............................54 4.5.3 河口灘線變化 ..............................56 4.6 水下沙丘分析結果 ..............................59 4.6.1水下沙丘型態 ..............................59 4.6.2水下沙丘運移及輸砂量 ......................61 第五章 結論與建議 ..............................67 5.1 結論 ......................................67 5.2 建議 ......................................68 參考文獻 ......................................69

    1. 林雅谷(2005)，「風沙與地形變動之試驗研究」，國立成功大學水利及海洋工程研究所碩士論文

    2. 林煒傑(2007)，「感潮河段之潮位及河床特性─ 以淡水河下游為例」，國立中央大學土木工程 學系研究所碩士論文; The topological and tidal characteristics in the downstream reach of Dan-Shui River. 2007.

    3. 周憲德;李璟芳;蔡輝平;陳沛蓉;顏鈞豪;吳湘雲;曾文毅;張欽舜(2012)「淡水河下游河口附近水理輸砂及地形變遷研究」，交通部運輸研究所; Sediment transport and geomorphological evolution around Danshui Rivermouth. 2012.

    4. 周憲德(2014)，「103 年淡水河下游及河口附近水理輸砂及地形變遷研究」，交通部運輸研究所; Sediment transport and geomorphological evolution around Danshui Rivermouth. 2014.

    5. 陳沛蓉(2014)，「淡水河河口之水理特性及地形演變分析」，國立中央大學土木工程學系研究所碩士論文

    6. 「新北市政府水利局」網站，www.wrs.ntpc.gov.tw/

    7. 「中央氣象局全球資訊網」，http://www.cwb.gov.tw/V7/index.htm.

    8. Bagnold, R. A. (1941). The physics of wind blown sand and desert dunes. Methuen, London, 265(10).

    9. Barnard, P. L., Erikson, L. H., Rubin, D. M., Dartnell, P., & Kvitek, R. G. (2012). Analyzing bedforms mapped using multibeam sonar to determine regional bedload sediment transport patterns in the San Francisco Bay coastal system. International Association of Sedimentologists’ Special Publication Book on Shelf Sedimentology, Special Publication, 44, 273-294.

    10. Charru, F., Andreotti, B., & Claudin, P. (2013). Sand ripples and dunes. Annual Review of Fluid Mechanics, 45, 469-493.

    11. Dong, Z., Liu, X., Wang, H., & Wang, X. (2003). Aeolian sand transport: a wind tunnel model. Sedimentary Geology, 161(1), 71-83.

    12. Dong, Z., Wang, H., Qian, G., Luo, W., & Zhang, Z. (2006). Wind shear with a blowing‐sand boundary layer. Geophysical research letters, 33(22).

    13. Duffy, G. P., & Clarke, J. E. H. (2012). Measurement of bedload transport in a coastal sea using repeat swath bathymetry surveys: assessing bedload formulae using sand dune migration. Sediments, Morphology and Sedimentary Processes on Continental Shelves: Advances in Technologies, Research, and Applications, 249-271.

    14. Hsu, S. A. (1977), “Boundary Layer Meteorological Research in the Coastal Zone,” Geoscience and Man, H. J. Walker, ed., School of Geoscience, Louisiana State University, Baton Rouge, LA, Vol 18, pp 99-111.

    15. Hsu, S. A. (1986), “Correction of Land-Based Wind Data for Offshore Applications: A Further Evaluation,” Journal of Physical Oceanography, Vol 16, pp 390-394.

    16. Kawamura, R. (1951) Study of Sand Movement by Wind. Univ. Tokyo, Rept. Inst. Sci. &Technology, 5.

    17. Lettau, K. & Lettau, H. (1977) Experimental and micrometeorological field studies of dune migration. In: Exploring the World’s Driest Climate (Ed. by K. Lettau & H. Lettau). University of Wisconsin Press, Madison.

    18. O'brien, M. P., & Rindlaub, B. D. (1936). The transportation of sand by wind. Civil Engineering, 6(5), 325-327.

    19. Rubin, D. M. (2012). A unifying model for planform straightness of ripples and dunes in air and water. Earth-Science Reviews, 113(3), 176-185.

    20. Sarre, R. D. (1988). Evaluation of aeolian sand transport equations using intertidal zone measurements, Saunton Sands, England. Sedimentology, 35(4), 671-679.

    21. Van Rijn, L. C. (1984). Sediment transport, part I: bed load transport. Journal of hydraulic engineering, 110(10), 1431-1456.

    22. Van Rijn, L. C. (1984). Sediment transport, part III: bed forms and alluvial roughness. Journal of hydraulic engineering, 110(12), 1733-1754.

    23. White, B.R. (1979) Soil transport by winds on Mars. J .geophys. Res., 84, 4643-51.

    24. Zingg, A .W. (1953) Wind tunnel studies of the movement of sedimentary material. Proc. 5th Hydraul. Conf; Bull. Iowa State Univ, Studies in Engineering, 34, 11 1-135.

    QR CODE
    :::