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題名 | 溪流魚道系統之二維與三維水理銜接模擬研究=Coupled Simulations of 2D and 3D Flows in a Fishway System of River |
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作者 | 郭文達; 張文鎰; 賴進松; 胡通哲; 陳弘凷; 謝天元; Guo, Wen-dar; Chang, Wen-yi; Lai, Jihn-sung; Hu, Tung-jer; Chen, Hung-kwai; Shieh, Tian-yuan; |
期刊 | 農業工程學報 |
出版日期 | 20120900 |
卷期 | 58:3 2012.09[民101.09] |
頁次 | 頁16-39 |
分類號 | 434.287 |
語文 | chi |
關鍵詞 | 魚道系統; 臺灣鏟頷魚; 最大持續游速; 棲地面積; Fishway system; Varicorhinus barbatulus; Maximum sustained swimming speed; Fish habit area; |
中文摘要 | 以往對於魚道水理之研究主要是局限於魚道內部流場水深的模擬分析與探討, 甚少針對現場河道與魚道整合之系統性研究。為進一步分析了解魚道系統之整體流 場特性,本文提出一個可銜接二維與三維模式之演算流程,並以桶後溪魚道系統為 研究案例,進行魚道之二維與三維水理模擬與分析。利用現場量測資料之水理條件 進行數值模擬,並與現場量測資料比較,驗證銜接演算方法具有良好之模擬能力。 本文使用此銜接演算方法進行四組不同流量條件之數值模擬,將所獲得的水理模擬 結果結合魚類生物特性,藉由台灣原生種台灣鏟頜魚最大持續游速之特性,進行魚 道休息空間、棲地面積、以及魚道系統之設計布置與水理流況檢核等探討。研究結 果可知,溪流流量之增加會減少台灣鏟頜魚之魚道休息空間及可存活棲地面積,此 結果可提供不同溪流流量條件下魚道系統設計之參考。 |
英文摘要 | In previous researches, fishway hydraulics emphasized mainly on the single inner part of the fishway. The fishway research is rarely integrated in a river system. Thus, this paper proposes a coupled algorithm of two-dimensional (2D) and three-dimensional (3D) free-surface finite-volume models for the numerical study on the fishway system in river. The idea of the proposed modeling algorithm is firstly to couple and integrate the 3D fishway with the 2D river system by the boundaries of the entrance and the exit of the fishway. Secondly, the numerical validation at the entrance and the exit of fishway are performed based on the comparisons of the measured data with the simulated results by 2D flow model. Finally, the validated data are referred to as the boundary-condition values for 3D flow simulations inside the fishway. This coupled algorithm is applied to simulate flow fields in the fishway system of the Tong-hou River in northern Taiwan. Four different flow discharges of 0.44 m3/s, 1.52 m3/s, 4.67 m3/s and 6.31 m3/s are used to simulate flow patterns and depths. The simulated results are in satisfactory agreement with the measured ones, showing the good accuracy of using this algorithm. Then, the simulated results of hydraulic properties are combined with the biological characteristic, the maximum sustained swimming speed of Varicorhinus barbatulus, for further investigation concerning the fish resting spaces, fish habit areas, hydraulic characteristics and design layout. The results show that the resting spaces and the habit areas of Varicorhinus barbatulus decrease with the increase of flow discharge. The results of this study would be useful for designing a fishway. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。