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題 名 | 梯形渠道粗糙係數之研究=Study on Estimation of Roughness Coefficient for Trapezium Channels |
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作 者 | 楊紹洋; 詹榮鑑; 江慶星; | 書刊名 | 萬能學報 |
卷 期 | 35 2013.07[民102.07] |
頁 次 | 頁187+189-200 |
分類號 | 434.287 |
關鍵詞 | 生態工程; 渠槽試驗; 粗糙係數; 面積分離法; Ecological engineering; Hydraulic channel test; Roughness coefficient; Area-separation method; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究探討梯形渠道對粗糙係數的關係,選用高粗糙面、低粗糙面、及光滑面等三種材料,模擬渠道的三面工。首先,進行材料面的渠槽試驗,估算各材料面的粗糙係數;接著,進行不同材料渠面組合的渠槽試驗;最後,由試驗估算所得各材料面的粗糙係數,以坡度面積法、面積分離法、及潤周等效法等估算組合渠道的粗糙係數,並比較三種估算方法所得渠道粗糙係數,分析梯形渠道三面工不同粗糙面組合對渠道粗糙係數的影響,藉以建立梯形渠道粗糙係數有效的估算方法,提升生態工程水理設計的安全性。研究成果顯示,渠道粗糙係數受到渠坡的影響大於流量的影響,梯形組合渠道粗糙係數大小順序為I > II > III。以面積分離法和坡度面積法等估算渠道粗糙係數結果較為一致,而以潤周等效性法估算渠道粗糙係數與前兩者差異較大。 |
英文摘要 | This study investigates the relations of trapezium channels to roughness coefficient. There are three kinds of coarse materials for using to simulate the surfaces of channel. The hydraulic channel test is performed and the roughness coefficients of coarse materials are estimated. Then, the roughness coefficients of multiple channels are obtained by the hydraulic channel test. Finally, the roughness coefficients of multiple channels are estimated by using the slope-area, area-separation, and wet-perimeter equivalence methods, respectively. These results are compared, and the accuracy of roughness coefficients estimated by three methods is analyzed. The proposed method is provided to estimate effectively the roughness coefficient for the multiple trapezium channels. This method can be useful to promote the safety of hydraulic design in ecological engineering. It provides a convenient and effective method for the hydraulic design of multiple ecological channels. The results show that the effect of slope for the roughness coefficient of multiple trapezium channel is larger than that of flow rate. The roughness coefficients of multiple trapezium channels are I > II > III. The roughness coefficient of multiple trapezium channel obtained by the slope-area method agree with that by the area-separation method. However, the roughness coefficient of multiple trapezium channel obtained by the wet-perimeter equivalence method is different with those obtained by the above two methods. |
本系統中英文摘要資訊取自各篇刊載內容。