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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 張倉榮(Tsang-Jung Chang) | |
dc.contributor.author | Shyh-Yuan Maa | en |
dc.contributor.author | 馬士淵 | zh_TW |
dc.date.accessioned | 2021-06-17T07:34:50Z | - |
dc.date.available | 2021-02-26 | |
dc.date.copyright | 2021-02-26 | |
dc.date.issued | 2021 | |
dc.date.submitted | 2021-02-20 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/73437 | - |
dc.description.abstract | 近年來流域內的河川水位因暴漲而溢堤,導致堤內地區的嚴重淹水災害增加。若能有快速且精度良好的流域淹水模式,將可提升流域尺度的災害應變能力。現有的NTU-CAFIM模式(National Taiwan University Cellular Automata Flood Inundation Model)經過發展,已可提供快速且精度良好的都會區地表淹水模擬,如能將其與一維河川變量流模式進行耦合,便可提供即時的流域淹水模擬,對於防災應變有所助益。 本研究選取合適之一維河川變量流模式,將其耦合可模擬二維漫地流淹水之NTU-CAFIM模式,使一維河川變量流模式與NTU-CAFIM模式之間可以線源的溢堤方式進行動態水體交換。並針對兩模式之耦合制定一套銜接方式,包含漫地流河岸網格與河段於不同空間解析度下之銜接、河岸網格與河段間水體傳遞量之計算等。其中,一維河川變量流模式與NTU-CAFIM模式之水體傳遞量部分採用自由或潛沒堰流公式計算。 本研究選取兩個研究案例,以效率係數(NSE)、準確度(ACC)與敏感度(TPR),比較耦合後的模式與HEC-RAS水理模式之模擬結果吻合程度,以此驗證本研究所制定的銜接方式。藉由小範圍理想案例以及具有真實地形的英國塞文河流域案例之模擬結果可知,耦合後的模式在河川斷面水位歷線、河川斷面流量歷線、二維漫地流觀測水位歷線、入流與溢流量歷線以及最大淹水範圍的模擬結果皆與HEC-RAS模式吻合。此外在理想案例以及英國塞文河流域案例上,耦合模式分別僅需HEC-RAS水理模式53%與59%之演算時間。以上結果表示耦合模式可合理模擬河川與漫地流之間的水體交換,且擁有較高的演算效率,在流域淹水模擬中具有相當的潛力。 | zh_TW |
dc.description.abstract | In recent years, serious flooding in areas near the river due to river embankment overflowing is increasing. To promote disaster prevention and protection for the whole river basin, a fast and accurate inundation simulation model is required. The existed National Taiwan University cellular automata flood inundation model (NTU-CAFIM model) can fastly and accurately provide a prediction of flooding in urban areas, thus it is appropriate to be coupled with the 1D unsteady river flow model to provide real-time forecasting of flooding in the river basin. In this study, the 1D unsteady river flow model (RFM) is coupled with the NTU-CAFIM model (OFM), so that water can be dynamically exchanged through embankments of each river reach. Rules to describe exchanged water are developed for coupling the RFM and OFM, including the correspondence of different spatial resolutions between riverbank cells in the OFM and river reaches in the RFM, and the calculation of exchanged volume between riverbank cells in the OFM and river reaches in the RFM. In particular, the exchanged volume between the RFM and OFM through embankments along each river is calculated by either free or submerged weir flow formulas. To verify the water exchanging rules in this study, two case studies are selected, and the coupled model is compared with the HEC-RAS model by indicators such as Nash-Sutcliffe efficiency (NSE), accuracy (ACC), and sensitivity (TPR). Based on the simulation results of a small-scale ideal case and the case of the Severn River Basin in the United Kingdom with an area of 24km2 and actual complex terrains. The simulation results of the coupled model in the hydrographs of water level in river sections, the hydrographs of flow rate in river sections, the hydrographs of water levels in two-dimensional overland flow, the hydrographs of water overflowing, and the maximum flooding area are very similar with the HEC-RAS model. Furthermore, in the ideal case and the real case of the Severn River Basin, the coupled model is 47% and 41% faster than the HEC-RAS model. The above results indicate that the coupled model is as accurate as the HEC-RAS model with a significant reduction in its computational time. Hence, it is concluded that the coupled model has considerable potential to be applied to real-time simulation of flooding in the river basin. | en |
dc.description.provenance | Made available in DSpace on 2021-06-17T07:34:50Z (GMT). No. of bitstreams: 1 U0001-1902202115414100.pdf: 9417104 bytes, checksum: edf25b4da603009bcf67403bb703ee21 (MD5) Previous issue date: 2021 | en |
dc.description.tableofcontents | 謝誌 I 摘要 II Abstract IV 目錄 VI 圖目錄 IX 表目錄 XIII 符號說明 XIV 第一章 緒論 1 1.1 前言 1 1.2 文獻回顧 2 1.2.1 NTU-CAFIM模式 2 1.2.2 一維河川變量流模式 4 1.2.3 河川與漫地流之間的雙向銜接方法 6 1.3 研究目的 9 1.4 研究流程 9 第二章 研究方法 10 2.1 耦合一維河川變量流模式與NTU-CAFIM模式 10 2.1.1 一維河川變量流模式 10 2.1.2 NTU-CAFIM模式 14 2.1.3 一維河川變量流模式與NTU-CAFIM模式之銜接方式 19 2.2 HEC-RAS水理模式 27 2.2.1 一維水動力計算模式 27 2.2.2 二維水動力計算模式 28 2.2.3 一維水動力計算模式與二維水動力計算模式之銜接 31 2.3 模式評估方式 33 2.3.1 效率係數 33 2.3.2 列聯表 34 2.3.3 準確度 35 2.3.4 敏感度 36 第三章 耦合模式之驗證 37 3.1 理想案例建置 37 3.2 理想案例模擬分析 40 3.2.1 河川流量歷線與水位歷線 41 3.2.2 漫地流分析點水位歷線與淹水範圍 45 3.2.3 入流與溢流量歷線 54 3.2.4 演算效率比較 56 第四章 耦合模式之應用 57 4.1 英國塞文河流域案例建置 57 4.1.1 研究區域概述 57 4.1.2 資料蒐集 59 4.1.3 模式建置 66 4.2 英國塞文河流域案例模擬分析 67 4.2.1 河川水位歷線 67 4.2.2 漫地流分析點水位與淹水範圍 74 4.2.3 演算效率比較 94 第五章 結論與建議 96 5.1 結論 96 5.2 建議 97 參考文獻 99 附錄A 英國塞文河流域河川斷面圖 103 | |
dc.language.iso | zh-TW | |
dc.title | 耦合一維河川變量流模式及NTU-CAFIM模式之研發與應用 | zh_TW |
dc.title | Development and Application of Coupled One-Dimensional Unsteady River Flow Model and National Taiwan University Cellular Automata Flood Inundation Model | en |
dc.type | Thesis | |
dc.date.schoolyear | 109-1 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 傅金城(Jin-Cheng Fu),張高華(Kao-Hua Chang),王嘉和(Chia-Ho Wang) | |
dc.subject.keyword | 變量流,二維淹水模式,耦合模式,溢堤, | zh_TW |
dc.subject.keyword | Unsteady flow,2D flood inundation model,Coupled model,Levee overtopping, | en |
dc.relation.page | 108 | |
dc.identifier.doi | 10.6342/NTU202100750 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2021-02-20 | |
dc.contributor.author-college | 生物資源暨農學院 | zh_TW |
dc.contributor.author-dept | 生物環境系統工程學研究所 | zh_TW |
顯示於系所單位: | 生物環境系統工程學系 |
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