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題名 | 魚道內砂丘板不同間距特性之研究=The Properties of Artifical Sand Dunes on Fishway with Different Intervals |
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作者 | 王雅禾; 唐後君; 段錦浩; | 書刊名 | 水土保持學報 |
卷期 | 32:2 2000.06[民89.06] |
頁次 | 頁79-85 |
分類號 | 434.287 |
關鍵詞 | 魚道; 砂丘板; 間距; 水深; Fishway; Artificial sand dunes; Interval; Water depth; |
語文 | 中文(Chinese) |
中文摘要 | 本研究採用三種不同渠槽流量,以及一種試驗砂,針對三種魚道坡度及四種砂丘板間距,施行渠槽試驗,針對渠槽各斷面水流的流速、水位高、比能以及曼寧n值進行討論,並於試驗完成後做初步的加砂試驗,討論魚道內加設無開口砂丘板之後淤積狀況。經由試驗資料分析可知,無論砂丘板有無開口,當砂丘板間距越小時,其水深變深,曼寧n值亦變大,造成流速減緩,最多可減少53.6,但有開口砂丘板在提高水位方面卻沒有預期的理想,只有在砂丘板斜坡面上水深有明顯的加深,不過,在穩定流心及排除淤砂方面卻比無砂丘板來的理想。本試驗針對魚道內砂丘板不同間距加以探討,以便了解間距大小對枯水時期各斷面流況及淤砂之影響,將提供往後魚道內部設計之參考。 |
英文摘要 | In this study, three discharges and one experimental sand for three slopes and four sand dunesplacement for experimental equipment were used to investigate the relationships among depth,velocity, specific energy, and Manning's roughness n. Sediment-loaded experiments were alsoconducted to examine the deposit condition at the downstream of sand dunes with no opening in thefishway. The results suggest that sand dunes, with or without opening, when the interval of sanddunes are small the depths are deeper. Manning's roughness n also become larger, thus slowingdown the velocity with maximum decrease of 53.6 percent. However enhanced depth of sand duneswith opening have not reached ideal level, only the depth on an inclined plane of sand dunes have obviously deepened. For stabilizing flow and eliminating silt they are better than sand duneswithout opening. In this study different interval of sand are dunes in the Fishway were investigatedto know interval effect of each section flow condition and silt in low water period. The results areuseful for design of inner structure for fishway. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。