黃宏斌臺灣大學：生物環境系統工程學研究所謝孟荃Shieh, Meng-ChyungMeng-ChyungShieh2007-11-272018-06-292007-11-272018-06-292005http://ntur.lib.ntu.edu.tw//handle/246246/56043摘 要 本研究以混合粒徑進行輸砂量試驗並觀察試驗過程中泥砂運移現象，發現混合粒徑渠床對於不同水流作用會產生不同程度之分選或遮蔽效應。 將本研究之渠槽試驗數據配合國內外渠槽資料重新迴歸分析討論，推得一考慮單寬流量、坡度及粒徑分佈因子之臨界流量與沉滓運移模式。 經與前人輸砂量模式進行驗證比較，可知本研究所推導出之輸砂量模式，無論在均勻或混合粒徑試驗資料上，較其他各家輸砂模式更吻合試驗數據，因此，利用本研究所推導之輸砂模式對均勻或混合粒徑均可以普遍提供良好之推估結果。 關鍵字：混合粒徑、渠槽試驗、輸砂量ABSTRACT This study used mixed-grain as the materials to do sediment transport flume experiment and observed the motion of sediment in the process of the experiment. We could find that mixed-grain in the channel-bed was occurred different sorting or hiding phenomenon in the different flow discharges. According to the experimental data of this study and other existing flume data collected from home and abroad, we derived the models for critical discharge and sediment transport conducting unit effective flow discharge, slope and gradation coefficient by multiple regression analysis. After verification and comparison, the model of this study matched better with the experiment data of both uniform and mixed grain than those of existing sediment transport models. Therefore, using the sediment transport model derived in this study could provide the reasonable result for estimating uniform or mixed grain sediment transport accurately. Keywords：Mixed Grain Size, Flume Experiment, Sediment Discharge摘要…………………………………………………………………I ABSTRACT …………………………………………………………II 目錄………………………………………………………………III 表目錄……………………………………………………………VI 圖目錄……………………………………………………………VII 照片目錄………………………………………………………VIII 附表………………………………………………………………IX 照片說明………………………………………………………… X 符號說明…………………………………………………………XI 一、前言…………………………………………………………1 二、前人研究……………………………………………………2 2-1均勻粒徑輸砂量模式………………………………………2 2-2混合粒徑輸砂量模式………………………………………10 三、研究方法…………………………………………………15 3-1維度分析……………………………………………………15 3-2沉滓起動……………………………………………………17 3-3沉滓運移……………………………………………………17 四、渠槽試驗…………………………………………………19 4-1試驗渠槽儀器………………………………………………19 4-2試驗材料……………………………………………………20 4-3試驗設計…………………………………………………22 4-4試驗步驟…………………………………………………23 4-4-1渠槽佈置…………………………………………………23 4-4-2臨界流量（q c）試驗……………………………………24 4-4-3輸砂量（q s）試驗………………………………………25 伍、結果與討論…………………………………………………28 5-1上游加砂量之調整…………………………………………28 5-1-1低水流強度下之粗化現象………………………………29 5-1-2高水流強度下之細化現象…………………………………30 5-2均勻與混合粒徑輸砂量之探討………………………………31 5-2-1估算值與實測值差異性分析………………………………32 5-3不同水力特性對輸砂量之影響………………………………34 5-4輸砂模式之建立………………………………………………35 5-4-1臨界流量(q c)……………………………………………35 5-4-2輸砂量(q s)………………………………………………36 5-4-3臨界流量(q c)實測值與推估值分析……………………36 5-4-4臨界流量模式之建立………………………………………41 5-4-5推移質沉滓運移模式之建立………………………………42 5-5輸砂量推估模式之比較………………………………………45 5-5-1輸砂量試驗數據比較………………………………………45 5-5-2各家輸砂模式之推估比較…………………………………48 六、結論…………………………………………………………53 七、參考文獻……………………………………………………56 附表………………………………………………………………60 照片說明…………………………………………………………911119081 bytesapplication/pdfen-US混合粒徑渠槽試驗輸砂量Mixed Grain SizeFlume ExperimentSediment Dischargethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/56043/1/ntu-94-R91622005-1.pdf