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  1. NTU Theses and Dissertations Repository
  2. 工學院
  3. 土木工程學系
請用此 Handle URI 來引用此文件: http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/64691
完整後設資料紀錄
DC 欄位值語言
dc.contributor.advisor李鴻源
dc.contributor.authorWen-Shien Leeen
dc.contributor.author李文獻zh_TW
dc.date.accessioned2021-06-16T22:57:30Z-
dc.date.available2012-08-16
dc.date.copyright2012-08-16
dc.date.issued2012
dc.date.submitted2012-08-09
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53. 王傳益,葉昭憲,鄭人豪,段紀湘,呂其倫(2010),「防砂壩壩體移除之模型試驗-以七家灣溪一號壩為例」, 水土保持學報 42(4) :423-437 (2010)
dc.identifier.urihttp://tdr.lib.ntu.edu.tw/jspui/handle/123456789/64691-
dc.description.abstract國內通常都是以一維水理棲地模式來模擬河川棲地,然而一維模式僅僅能夠應用於空間大尺度上的河川棲地變遷研究,對於小尺度上的河川棲地複雜行為則較不容易得到一些可靠的結果。本文的研究目的為利用美國密西西比大學之國家水科學及工程中心(NCCHE)發展之CCHE2D水理輸砂模式模擬巴陵壩潰壩案例與七家灣溪一號壩拆壩案例,探討二維 CCHE2D與一維NETSTARS模式的水理及輸砂演算結果並討論潰壩過程中溯源沖刷行為、彎道二次流、上下游底質粒徑變化、水躍現象、河道橫斷面的沖淤變化和Doyle所提出的前三階段是否吻合,最後建立出二維生態適合度圖型探討不同重現期流量下之棲地適合度變化。
研究結果顯示溯源沖刷行為之發展為由一個點而非一個面發展,而彎道二次流發生處之棲地適合度指數明顯比無二次流發生處要高。此外上下游底質粒徑於潰壩後隨著彎道主流方向與於凸岸處產生粒徑細化;而凹岸處則產生粒徑粗化的現象且根據河道凹岸或是凸岸而有不同程度粗化的現象。而潰壩後之上游斷面變化尚符合Doyle(2002)前兩個階段之假設,然第三階段由於Doyle尚未考慮彎道與底床質組成之影響,因此斷面之沖淤行為於橫斷面上之分佈並非均勻,而是根據斷面距離壩體之距離與彎道位置之主深槽流向而呈現斷面上非均勻之沖淤現象。另外,七家灣溪由於受人為干擾、資料量測缺乏、模式設置上之限制與邊界條件上之影響而無法利用二維模式模擬出實測資料之斷面變化情形。
zh_TW
dc.description.abstractThe decision of dam removal need to carefully evaluate of the response of river from many perspectives.Among different issues of dam removal,one of the most challenging and critical concern is how to accommodate or offset the potential short-term impacts associated with the release of stored sediment.Utilizing one-dimensional hydraulic and sediment transport model to simulate the response after dam removal is common and widely accepted .However,it is highly limited in the model assumption and capacity and not able to provide a comprehensive analysis of channel evolution.For this concern,this study makes effort to evaluate to possibility of application of two-dimensional hydraulic and sediment model in dam removal simulations.This study applies a two dimensional model,CCHE2D,and take Barlin Dam Break and the removal of Qijiawan River Dam as case study.By comparing the simulation result from CCHE2D and NETSTARS,another one-dimensional model,this study pays attention to investigate the model capacity to describe two-dimensional hydraulic and sediment transport characteristics such as head cutting and knickpoint mitigration,secondary current flow,and channelization in different in different river section.In addition,two-dimensional Habitat Suitability Index(HSI) map is construced according to the model result and used to discuss the change of habitats under different discharge.en
dc.description.provenanceMade available in DSpace on 2021-06-16T22:57:30Z (GMT). No. of bitstreams: 1
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Previous issue date: 2012
en
dc.description.tableofcontents中文摘要 I
英文摘要 II
圖目錄 VI
表目錄 X
第一章 緒論 1
1.1研究緣起 1
1.2研究目的 2
1.3論文架構簡介 3
1.4研究流程 4
第二章 文獻回顧 5
2.1壩體移除後對河道變遷之影響 5
2.2拆壩模式與相關研究回顧 7
2.3.1拆壩一、二維數值模式 7
2.3.2拆壩模擬相關文獻 18
2.3拆壩產生之泥砂與生態之關連性 19
2.4棲地適合度指數與棲地可利用面積理論 23
第三章 研究方法 28
3.1 CCHE2D模式介紹 28
3.1.1模式簡介 28
3.1.2模式上游邊界與下游邊界之處理 39
3.1.3模式功能限制 40
3.1.4模式計算可得之結果 42
3.2巴陵壩資料彙整 42
3.2.1研究區域介紹 42
3.2.2地形資料 43
3.2.3水文資料 47
3.2.4粒徑資料 51
3.2.5上游入砂濃度 52
3.2.6水理參數設置 54
3.2.7輸砂動床參數設置 56
3.3七家灣溪一號壩資料彙整 57
3.3.1研究區域介紹 57
3.3.2地形資料 60
3.3.3水文資料 63
3.3.4粒徑資料 64
3.3.5水理輸砂參數設置 68
第四章 巴陵壩案例結果分析與討論 71
4.1模式檢定結果 73
4.1.1初始縱斷面 74
4.1.2初始橫斷面 76
4.1.3縱斷面率定驗證 80
4.2溯源侵蝕現象(KNICK-POINT MITIGATION) 84
4.3壩體上下游橫斷面沖淤行為 88
4.4水躍現象與位置 94
4.5彎道二次流效應 96
4.6壩體潰壩前後上下游底床粒徑變化 98
4.7不同重現期流量對生態影響之討論 105
4.8二次流與適合度之相關性 112
第五章 結論與建議 115
5.1結論 115
5.2建議 116
APPENDIX I 模式參數敏感度分析 123
APPENDIX II 七家灣溪拆壩案例模擬 129
dc.language.isozh-TW
dc.subject拆壩zh_TW
dc.subject潰壩zh_TW
dc.subjectCCHE2Dzh_TW
dc.subjectNETSTARSzh_TW
dc.subject二維水理輸砂模擬zh_TW
dc.subject彎道二次流zh_TW
dc.subject溯源沖刷zh_TW
dc.subject棲地適合度zh_TW
dc.subjectknickpoint mitigationen
dc.subjecthabitat fitnessen
dc.subjectsecondary flowen
dc.subjectTwo-dimensional hydraulic and sediment transport simulationen
dc.subjectNETSTARSen
dc.subjectCCHE2Den
dc.subjectDam breaken
dc.subjectDam removalen
dc.title二維水理輸砂模式於壩體移除分析應用之探討zh_TW
dc.titleThe Application of Two Dimensional Hydraulic and Sediment Transport Modelling in Dam Removal Simulationsen
dc.typeThesis
dc.date.schoolyear100-2
dc.description.degree碩士
dc.contributor.oralexamcommittee謝正倫,葉克家,游景雲
dc.subject.keyword潰壩,拆壩,CCHE2D,NETSTARS,二維水理輸砂模擬,彎道二次流,溯源沖刷,棲地適合度,zh_TW
dc.subject.keywordDam break,Dam removal,CCHE2D,NETSTARS,Two-dimensional hydraulic and sediment transport simulation,secondary flow,knickpoint mitigation,habitat fitness,en
dc.relation.page136
dc.rights.note有償授權
dc.date.accepted2012-08-09
dc.contributor.author-college工學院zh_TW
dc.contributor.author-dept土木工程學研究所zh_TW
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