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Basal interstitial water pressure in laboratory debris flows over a rigid bed in an open channel
http://hdl.handle.net/2241/117966
http://hdl.handle.net/2241/1179662db48443-3957-456d-9152-cc71bd640bb2
名前 / ファイル | ライセンス | アクション |
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NHESS_12-8.pdf (679.2 kB)
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Item type | Journal Article(1) | |||||
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公開日 | 2012-11-26 | |||||
タイトル | ||||||
タイトル | Basal interstitial water pressure in laboratory debris flows over a rigid bed in an open channel | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Hotta, N.
× Hotta, N. |
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著者別名 |
堀田, 紀文
× 堀田, 紀文 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Measuring the interstitial water pressure of debris flows under various conditions gives essential information on the flow stress structure. This study measured the basal interstitial water pressure during debris flow routing experiments in a laboratory flume. Because a sensitive pressure gauge is required to measure the interstitial water pressure in shallow laboratory debris flows, a differential gas pressure gauge with an attached diaphragm was used. Although this system required calibration before and after each experiment, it showed a linear behavior and a sufficiently high temporal resolution for measuring the interstitial water pressure of debris flows. The values of the interstitial water pressure were low. However, an excess of pressure beyond the hydrostatic pressure was observed with increasing sediment particle size. The measured excess pressure corresponded to the theoretical excess interstitial water pressure, derived as a Reynolds stress in the interstitial water of boulder debris flows. Turbulence was thought to induce a strong shear in the interstitial space of sediment particles. The interstitial water pressure in boulder debris flows should be affected by the fine sediment concentration and the phase transition from laminar to turbulent debris flow; this should be the subject of future studies. | |||||
書誌情報 |
Natural Hazards and Earth System Sciences 巻 12, 号 8, p. 2499-2505, 発行日 2012-08 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1561-8633 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.5194/nhess-12-2499-2012 | |||||
権利 | ||||||
権利情報 | © Author(s) 2012. CC Attribution 3.0 License. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | Copernicus Publications | |||||
URI | ||||||
識別子 | http://hdl.handle.net/2241/117966 | |||||
識別子タイプ | HDL |