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題名 | 蜿蜒河道橫向構造物配置之研究=Arrangement of Transverse Structures for Meandering River |
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作者姓名(中文) | 王傳益; 張耿偉; 施漢鵬; | 書刊名 | 水土保持學報 |
卷期 | 35:4 2003.12[民92.12] |
頁次 | 頁365-379 |
分類號 | 443.6 |
關鍵詞 | 水體溶氧; 流況歧異度; 鋸齒式固床工; Water-dissolved oxygen; Diversity of flow; Saw-tooth consolidation work; |
語文 | 中文(Chinese) |
中文摘要 | 本研究旨在透過彎曲渠槽試驗,探討固床工設置前後河川棲地型態之異同。藉由設置不同型式與間距之固床工,以瞭解水體溶氧、河川穩定性及河川流況歧異度等之變化情形,作為判定固床工配置良窳之指標。 研究結果顯示,鋸齒式固床工下游水體溶氧增加率較傳統式固床工下游為高,所產生之水流與河床型態較富變化,較能營造多樣化的棲地型態,有利於水中生物之生存。鋸齒式固床工的底床沖淤變化情形較傳統式為小,顯示鋸齒式固床工對底床穩定性有較佳之效果。在彎曲渠道中鋸齒式固床工間距為1倍河寬間距時,水體溶氧增加率為最高,穩定床面之效果佳,棲地流況歧異度高。 |
英文摘要 | This study is to investigate the difference of river habitat patterns before and after the construction of the consolidation works for the meandering channels based on a series of flume experiments. The variations of water-dissolved oxygen, diversity of flow, channel bed stability under different patterns and interval of consolidation works were used as indicators of the suitability of the consolidation work arrangements. The results from the experiments showed that the increasing rate in water-dissolved oxygen downstream of a saw-tooth consolidation work is higher than that of a conventional consolidation work. As well, the former has higher variety on flow and river bed patterns, which can effectively form a better river habitat environment for aquatic creatures. Scour and deposition of the channel bed for a saw-tooth consolidation work are less than those for a conventional consolidation work, indicating the former can better stabilize the channel bed. In a meandering channel, highest values of increasing rate in water-dissolved oxygen, channel bed stability and flow diversity were observed for a saw-tooth consolidation work with an interval one times of the channel width. |
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