查詢結果分析
來源資料
頁籤選單縮合
| 題 名 | 基於模型試驗探討下游河道放淤之沖刷成效=Exploring the Flushing Effectiveness of Replenished Sediment through Model Experiments |
|---|---|
| 作 者 | 李豐佐; 賴進松; 廖哲民; 陳秀娟; 凃秀錦; | 書刊名 | 農業工程學報 |
| 卷 期 | 70:3 2024.09[民113.09] |
| 頁 次 | 頁11-28 |
| 分類號 | 443.64 |
| 關鍵詞 | 防淤高程; 防淤隧道; 排砂效率; Desilting operation; Replenished sediment; Flushing efficiency; |
| 語 文 | 中文(Chinese) |
| DOI | 10.29974/JTAE.202409_70(3).0002 |
| 中文摘要 | 本研究旨在探討霧社水庫Q₂、Q₁₀和Q₅₀滯洪條件下,在水庫進行防淤排砂操作時,下游河道水庫抽泥暫置場一及暫置場二的放淤之沖刷效率。研究考慮了暫置場淤泥的乾密度或濃度特性,并進行了模型試驗,將30萬ppm或100萬ppm淤泥放置于暫置場一及暫置場二。研究結果顯示,在Q₂滯洪條件下,暫置場一的沖刷率為89.29 %;在Q₁₀滯洪條件下,暫置場一及暫置場二的沖刷率分別為81.68 %及84.31 %;在Q₅₀滯洪條件下,暫置場一及暫置場二的沖刷率分別為66.86 %及92.53 %。綜合試驗結果顯示,沖刷率受水庫各出水工排放流量、河道水位及沖刷時間等因素影響,但整體沖刷率大致維持八成以上。建議將淤積料機械挖除,再載運至河道暫置場二堆置土堤,並將多數淤泥移至土堤C及土堤D上游堆置,以提高沖刷效率。 |
| 英文摘要 | This study aims to investigate the flushing efficiency of sediment deposition in temporary sedimentation ponds one and two downstream of the Wushe Reservoir under Q₂, Q₁₀, and Q₅₀ flood detention conditions during reservoir desilting operations in the reservoir. The study considers the dry density or concentration characteristics of sediment in the temporary ponds and conducts model experiments by placing replenished sediment with concentrations of 300,000 ppm or 1,000,000 ppm in temporary ponds one and two. The results show that under Q₂ flood detention conditions, the flushing rate of temporary pond one is 89.29 %; under Q₁₀ flood detention conditions, the flushing rates of temporary ponds one and two are 81.68 % and 84.31 %, respectively; under Q₅₀ flood detention conditions, the flushing rates of temporary ponds one and two are 66.86 % and 92.53 %, respectively. The comprehensive experimental results indicate that the flushing rate is influenced by factors such as the discharge flow rate of each outlet of the reservoir, river water level, and flushing time, but overall, the flushing rate is maintained at over eighty percent. It is recommended to mechanically remove accumulated sediment and transport it to temporary sedimentation pond two for deposition on earthen berms. Additionally, relocating the majority of the sediment to upstream berms C and D is suggested to enhance flushing efficiency. |
本系統中英文摘要資訊取自各篇刊載內容。