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ファイル | 記述 | サイズ | フォーマット | |
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j.apm.2014.05.021.pdf | 3.44 MB | Adobe PDF | 見る/開く |
タイトル: | A dual finite volume method scheme for catastrophic flash floods in channel networks |
著者: | Yoshioka, Hidekazu Unami, Koichi https://orcid.org/0000-0001-6910-1094 (unconfirmed) Fujihara, Masayuki https://orcid.org/0000-0001-6868-0143 (unconfirmed) |
著者名の別形: | 吉岡, 秀和 |
キーワード: | Channel network Dam failure Finite volume method Flash floods Shallow water equations |
発行日: | Jan-2015 |
出版者: | Elsevier Inc. |
誌名: | Applied Mathematical Modelling |
巻: | 39 |
号: | 1 |
開始ページ: | 205 |
終了ページ: | 229 |
抄録: | This paper develops a new numerical scheme for flash floods based on the one-dimensional shallow water equations in channel networks, referred to as the dual finite volume method (DFVM) scheme. The scheme uses an upwind spatial discretization based on staggered meshes so that the flows in multiply connected channel networks are consistently handled without complicated treatment at junctions. The scheme is firstly examined with a series of test cases including idealized and experimental dam break problems to demonstrate its accuracy and versatility. The scheme is then applied to numerical simulation of a flash flood resulting from an earthquake-induced complete dam failure in Japan. Channels from a reservoir to the downstream rivers are modelled as a multiply connected channel network with non-prismatic cross-sections, steep slopes, and bends. The computational results agree well with the field observations and eyewitness reports. Numerical simulation of alternative scenarios as possible cases is also performed to analyze potential risks of the downstream area. |
著作権等: | © 2014 Elsevier Inc. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/193279 |
DOI(出版社版): | 10.1016/j.apm.2014.05.021 |
出現コレクション: | 学術雑誌掲載論文等 |
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