頁籤選單縮合
題 名 | 河岸植生對河道幾何形狀影響之研究=Effect of Bank Vegetation on Geometry of River |
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作 者 | 詹錢登; 蔡嘉蓉; | 書刊名 | 力學 |
卷 期 | 13:3 1997.09[民86.09] |
頁 次 | 頁237-244 |
分類號 | 443.1 |
關鍵詞 | 河; 河岸; 河岸植生; 河道幾何形狀; River; River bank; Bank vegetation; River geometry; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以水槽動床實驗並配合數值模擬,研究在相同河床質下,流量、輸砂量及渠 岸植生型態對渠道幾何形狀之影響。實驗渠道包括裸岸渠道、單岸植生渠道及雙岸植生渠 道。實驗結果顯示:(1) 輸砂量的增加會造成水深減少,寬度與坡度增加;(2) 流量的增加 會造成水深與寬度增加而坡度變小;(3) 在相同流量及輸砂量條件下,裸岸渠道、單岸植生 渠道及雙岸植生渠道之渠床坡度大致相同,此顯示渠岸植生對渠道坡度之影響不顯著; (4) 在相同流量及輸砂量條件下,裸岸渠道寬度最、大水深最淺,雙岸植生渠道寬度最小、水深 最大。數值模擬結果並與實驗結果相比較,結果顯示數值模式模擬之渠寬及渠床坡度與實驗 結果相當一致,但模擬所得之水深略小於實驗水深。 |
英文摘要 | The influences of flow discharge, sediment load and bank vegetation on geometry of alluvial channels were investigated through laboratory experiments and numeri-cal simulations in this study. The bed material was kept to be the same for all the experiments. The experi-mental results showed that:(1)An increase of the sedi-ment transport rate caused the increases of channel slope and width, but the decrease of channel depth; (2)An increase of the flow discharge caused the increases of the channel depth and width but the decrease of channel slope;(3)The bank vegetation had little influence on channel slope, but had significant influence on channel depth and width. The channel with thicker bank vege-tation developed to be narrower and deeper. The nu-merically simulated geometry of an alluvial channel was also compared with experimental one. The comparison showed that the simulated channel width and slope were in good agreement with experimental results, but simu-lated channel depth was slightly smaller than the experi-mentally measured one. |
本系統中英文摘要資訊取自各篇刊載內容。