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Effects of tree characteristics and substrate condition on critical breaking moment of trees due to heavy flooding
https://sucra.repo.nii.ac.jp/records/13385
https://sucra.repo.nii.ac.jp/records/1338525a04963-d35c-4c63-a11c-514523b3cc52
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
A1002830.pdf (2.6 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2009-02-26 | |||||
| タイトル | ||||||
| タイトル | Effects of tree characteristics and substrate condition on critical breaking moment of trees due to heavy flooding | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Tree-breaking pattern | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Forestation | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Regeneration | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Root zone | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | Moment by drag force | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
田中, 規夫
× 田中, 規夫 |
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| 著者 ローマ字 | ||||||
| 値 | Tanaka, Norio | |||||
| 著者 ローマ字 | ||||||
| 値 | Yagisawa, Junji | |||||
| 著者 所属 | ||||||
| 値 | 埼玉大学大学院理工学研究科環境科学・社会基盤部門 | |||||
| 著者 所属(別言語) | ||||||
| 値 | Graduate School of Science and Engineering, Saitama University | |||||
| 著者 所属(別言語) | ||||||
| 値 | Graduate School of Science and Engineering, Saitama University | |||||
| 書誌情報 |
LANDSCAPE AND ECOLOGICAL ENGINEERING 巻 5, 号 1, p. 59-70, 発行日 2009 |
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| 年月次 | ||||||
| 値 | 2009-2 | |||||
| 出版者名 | ||||||
| 出版者 | SPRINGER | |||||
| 収録物識別子 | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 18601871 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | info:doi/10.1007/s11355-008-0060-5 | |||||
| 関連サイト | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | http://www.springerlink.com/content/un412u8nn8w44357/ | http://www.springerlink.com/content/un412u8nn8w44357/ | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | To elucidate tree breakage conditions with different breaking mechanisms, i.e., moment by drag force, local scour, and degradation of the substrate around trees, field surveys were conducted after a flood event (September 2007 flood due to Typhoon 9) in the Tamagawa River, Japan. Trees in a river have two main breaking mechanisms during a flood event, moment by fluid force and erosion of the substrate. Moment by fluid force causes two breaking phenomena, trunk damage (bending, breakage) and overturning. Trunk bending or breakage can be expressed as a function of d (c) , where d is the trunk diameter at breast height and the power c equals 3 for trunk bending or breakage, and approximately 2 for overturning. Smaller diameter trees experienced trunk breakage, but larger trees were overturned. The range for these two breaking patterns changes with the substrate condition. If severe scouring has occurred, the threshold for overturning moment can be quite small. Tree overturning occurred mostly on the bank side of the gravel bar; however, some trees, especially Robinia pseudo acacia and Morus bombycis, were overturned if the substrate was a thin deposited soil or silt layer on gravel. The roots were anchored in the small-particle deposited layer in that case. As for the erosion of the substrate, the tree-breaking patterns can be classified into three types depending on the relationship between the nondimensionalized bed shear stress of d (50) and d (84), the representative grain diameters at which 50 and 84% of the volume of the material, respectively, is finer. The nondimensionalized shear stress of d (84) is an important parameter for discussing the rehabilitation of the gravel bed bar. The boundary region for tree overturning can be changed by the effects of plant cover and debris attachment. | |||||
| 版 | ||||||
| 値 | [著者版] | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| 資源タイプ | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | text | |||||
| フォーマット | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | application/pdf | |||||
| 作成日 | ||||||
| 日付 | 2009-02-26 | |||||
| 日付タイプ | Created | |||||
| アイテムID | ||||||
| 値 | A1002830 | |||||
