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小流域の水田灌漑ブロックにおける農業排水路中のZn濃度の変化
https://doi.org/10.24514/0002001306
https://doi.org/10.24514/00020013060f4bff8f-9569-4aac-a0be-d02b88015af7
名前 / ファイル | ライセンス | アクション |
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(c) 国立研究開発法人 農業・食品産業技術総合研究機構
National Agriculture and Food Research Organization, Japan |
Item type | 紀要論文 / Departmental Bulletin Paper_03(1) | |||||||||||||||||||||||||||||||||||||||||||||
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公開日 | 2025-05-30 | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | 小流域の水田灌漑ブロックにおける農業排水路中のZn濃度の変化 | |||||||||||||||||||||||||||||||||||||||||||||
言語 | ja | |||||||||||||||||||||||||||||||||||||||||||||
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タイトル | Fluctuations in Zinc Concentrations in the Agricultural Water of Drainage Canals in a Paddy Field Block within a Small Catchment Area | |||||||||||||||||||||||||||||||||||||||||||||
言語 | en | |||||||||||||||||||||||||||||||||||||||||||||
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言語 | jpn | |||||||||||||||||||||||||||||||||||||||||||||
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資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||||||||||||||||||||||||||||||||
資源タイプ | article | |||||||||||||||||||||||||||||||||||||||||||||
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ID登録 | 10.24514/0002001306 | |||||||||||||||||||||||||||||||||||||||||||||
ID登録タイプ | JaLC | |||||||||||||||||||||||||||||||||||||||||||||
著者 |
人見, 忠良
× 人見, 忠良
× 吉永, 育生
× 三浦, 麻
× 濵田, 康治
× 髙木, 強治
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内容記述タイプ | Abstract | |||||||||||||||||||||||||||||||||||||||||||||
内容記述 | Zinc is an essential element for biological activity. On the other, zinc is also a hazardous material for the growth of aquatic life if excess amounts of zinc occur in the aquatic environment. The Ministry of the Environment in Japan has determined that a zinc concentration of less that 30μg/L in water should be one of the Living Environment Items of the Environmental Quality Standards for Water Pollution. This standard was decided from the view point of the conservation of aquatic life. Quantitative data on the dynamics of zinc in water environments is required in order to conserve aquatic life. This study focused on zinc dynamics in the agricultural water of drainage canals. The pattern of distribution of zinc concentrations in environment waters is basically infl uenced by the geological conditions, and the fl uctuation in zinc concentrations is determined by the climatic conditions, such as the intensity of rainfall. To add to these natural facters, the dynamics of zinc in paddy fi eld blocks is infl uenced by agricultural practices. The amount of water used for the paddy fi elds accounts for the largest proportion of the total amount of water use. Thus, irrigation water plays an important role in any regional hydrological cycle. In addition, the farming schedule, such as puddling, transplanting and mid-summer drainage may strongly infl uence the water balance and mass transfer process of materials in paddy fi eld blocks. The characteristics of zinc dynamics in a paddy fi eld block were studied in consideration of these agricultural practices. This paper discusses the characteristics of the fl uctuation in the zinc concentrations in the discharged water from a paddy fi eld block. Three periods of different agricultural water management, were investigated: the non-irrigated period, the puddling and transplanting period, and the normal ponding period. The results are summarized as follows. (1) The increase in zinc concentrations in the drainage water in the early PeriodⅡwhen the irrigation of the paddy fi elds started may be due to the fl ushing fl ow of irrigation water. (2) The positive correlation between zinc concentrations and turbidity in the drainage water suggests that the zinc mainly originates from suspended matter. (3) The pattern of fl uctuation in the zinc concentrations during rainfall periods varied with the rainfall pattern, such as its intensity and duration. (4) The average concentration of zinc in the discharged water in normal ponding periods was at the same level as that of the irrigation water. During the periods from the starting of irrigation supply to puddling and transplanting, the average concentration of zinc in the discharged water was higher than that of irrigation water. |
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言語 | en | |||||||||||||||||||||||||||||||||||||||||||||
書誌情報 |
ja : 農村工学研究所技報 en : Technical report of the National Institute for Rural Engineering 巻 207, p. 53-62, 発行日 2008-03-31 |
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出版者 | 独立行政法人農業食品産業技術総合研究機構農村工学研究所 | |||||||||||||||||||||||||||||||||||||||||||||
言語 | ja | |||||||||||||||||||||||||||||||||||||||||||||
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出版者 | National Agriculture and Food Research Organization, National Institute for Rural Engineering | |||||||||||||||||||||||||||||||||||||||||||||
言語 | en | |||||||||||||||||||||||||||||||||||||||||||||
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収録物識別子タイプ | PISSN | |||||||||||||||||||||||||||||||||||||||||||||
収録物識別子 | 1882-3289 |