透過您的圖書館登入
IP:3.236.139.73
  • 學位論文

二維水理模式之模擬與現況探討

Simulation and study of two-dimensional finite-element hydrodynamic model

指導教授 : 張德鑫

摘要


二維水理數值模式一般優於一維水理數值模式,因其可以精確、明確地表現渠道中流況尺度的變化條件,即可提供細小的地形特徵,亦可據以建立三維性之水流二維水深平均模式,對於複雜之邊界問題以簡化方式處理;再言一維水理模式只能夠模擬斷面之平均水理狀況,無法模擬局部流況變化,故選定二維模式做為一適用於水工結構物局部流況之水理演算之工具。 本研究旨在提出分析方法與步驟,使用二維水理模式作一河道模擬分析,由於本研究所介紹三個二維水理模式(包含RMA2模式、HIVEL2D模式、FESWMS模式)均有其適用之範圍以及限制之條件,故本研究選定一適合模擬老街溪之二維水理模式作為水理分析之工具,藉由分析之結果,重新評估該河段之防洪排洪能力,並就實際整體防洪需求做妥善的治理建議,使研究成果能提供相關對策之參考。 根據本研究選用HIVEL2D模式之二維水理模式之模擬結果,在老街溪橋上游右岸(斷面46-1)、攔河堰上游左岸(斷面46-2)、新民橋上游左、右岸,下游右岸(斷面47-1)、加蓋河斷-中央西路橋左、右岸(斷面48-2)等,其洪水位高於現況堤岸高,有溢堤之危險。利用二維HIVEL2D模式所模擬出的結果,其與一維HEC-RAS模式所模擬出的結果雖有些許差異,主要為因為一維與二維兩者地形建置有所不同,若兩者結果無太大出入,其誤差為合理及可接受範圍。

並列摘要


Generally speaking, the two-dimensional hydrodynamic model is better than one-dimensional hydrodynamic model because the variational conditions of the flow in the channel can be accurately and definitely presented by using the model. In addition, the two- dimensional hydrodynamic model can supply the fine features of the geography, they can establish the two-dimensional depth average model of the three dimensional fluid, then using the simple way to solve the difficult boundary questions; Furthermore, the one-dimensional hydrodynamic model is only used to simulate the average water situation of the sectional fluid but not used to simulate the local changes of fluid. So, two-dimensional hydrodynamic is the proper tool that can be used in fluid calculation of designate fluid. The researcher points out the analytic methods and steps then uses the two-dimensional hydrodynamic model to analyze the simulation of watercourse. There are three two-dimensional hydrodynamic models (inclusive of the RMA2 model, HIVEL2D model and FESWMS model) which are included identical range and limitation in our graduate school. The researcher chose the two-dimensional hydrodynamic model as the proper tool which can be used to simulate the flowof the old street stream. Researcher will transvaluation the retaining ability of the watercourse and consider the practice requirements to make the proper govern suggestion, furthermore, the results can be used as the reference of relative principles. According to the simulative results of two-dimensional hydrodynamic model -HIVEL2D, the (section 46-1) upstream right coast, the left coast of (section46-2), and the left upstream (section 48-2) etc., their heads are higher than the present levee and the possible danger of overflow. Using the results of simulations of two-dimensional HIVEL2D model, there is a little differences between two and one-dimensional HEC-RAS model. Because the different geographies of one and two dimensional. If there are not too many differences between one and two-dimensional the mistake is reasonable and acceptable

參考文獻


21. 游蕙綾(2003),「丁壩工對感潮河口魚類棲地面積影響之研究」,台灣大學土木工程學研究所碩士論文。
2. Hicks, B. B. (1972), “Some evaluations of drag and bulk transfer coefficients over water bodies of different sizes.” Boundary-Layer Meteorology, 3(1), P.201-213.
5. Garratt, J. R. (1977), “Review of drag coefficients over oceans and continents.” Monthly Weather Review, 105(7), P.915-929.
6. Fischer, H. B., List, E. J., Koh, R. C. Y., Imberger, J., and Brooks, N. H. (1979), “Mixing in inland and coastal water,” Academic Press, New York.
7. Rodi, W. (1980), “Turbulence models and their application in hydraulics - A state of the art review,” State-of-the Art Paper, International Association for Hydraulic Research, Delft, The Netherlands.

被引用紀錄


褚柏廷(2017)。應用物種分布模型與River2D評估河川生態系統:以大屯溪為例〔碩士論文,國立臺灣大學〕。華藝線上圖書館。https://doi.org/10.6342%2fNTU201701343

延伸閱讀