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Comparative Study on Steady and Non-Steady state Formulae of Subsurface Drain Spacing : Design on Subsurface Drainage in Paddies (I)
https://doi.org/10.24729/00009254
https://doi.org/10.24729/0000925405efd156-4bb3-44f1-9a6e-b3e718f9fcdc
名前 / ファイル | ライセンス | アクション |
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KJ00004361221.pdf (354.7 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2009-08-25 | |||||
タイトル | ||||||
タイトル | Comparative Study on Steady and Non-Steady state Formulae of Subsurface Drain Spacing : Design on Subsurface Drainage in Paddies (I) | |||||
言語 | ||||||
言語 | eng | |||||
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 | departmental bulletin paper | |||||
ID登録 | ||||||
ID登録 | 10.24729/00009254 | |||||
ID登録タイプ | JaLC | |||||
著者 |
MURASHIMA, Kazuo
× MURASHIMA, Kazuo× OGINO, Yoshihiko |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The performance of a steady state method, proposed by the authors, for determining subsurface drain spacing in paddies was examined and evaluated as compared to a non-steady state method. The steady formula, in which a certain drainage rate (design drainage rate) was used, became equivalent to non-steady formula under the condition that excess water in topsoil is to be removed within a day, a twenty four hour period. It was, however, revealed experimentally that to represent porosity of shallow topsoil used in the non-steady formula, with a single value was difficult, and consequently, the non-steady formula gave unstable spacing. The steady method, on the other hand, performed and determined spacing without any soil parameters even if drainage testing was carried out. | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology. 1992, 44, p.41-48 | |||||
書誌情報 |
Bulletin of the University of Osaka Prefecture. Ser. B, Agriculture and biology 巻 44, p. 41-48, 発行日 1992-03-31 |
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書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00106812 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | University of Osaka Prefecture |