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水質及び同位体分布特性からみた水田主体扇状地における地下水涵養源の分類
https://doi.org/10.24514/0002001411
https://doi.org/10.24514/0002001411f618f8f7-597c-459b-8e70-669b4c3027ae
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
TRNIRE211_21-34.pdf (3.6 MB)
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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 | 2025-10-31 | |||||||||||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||||||||||
| タイトル | 水質及び同位体分布特性からみた水田主体扇状地における地下水涵養源の分類 | |||||||||||||||||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||||||||||||||
| タイトル | Classification of Recharge Sources of Groundwater in a Paddy Dominant Alluvial Fan Based on Geochemical and Isotopic Analyses | |||||||||||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||||||||||
| 言語 | ||||||||||||||||||||||||||||||||||||||
| 言語 | jpn | |||||||||||||||||||||||||||||||||||||
| 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 | article | |||||||||||||||||||||||||||||||||||||
| ID登録 | ||||||||||||||||||||||||||||||||||||||
| ID登録 | 10.24514/0002001411 | |||||||||||||||||||||||||||||||||||||
| ID登録タイプ | JaLC | |||||||||||||||||||||||||||||||||||||
| 著者 |
土原, 健雄
× 土原, 健雄
× 吉本, 周平
× 石田, 聡
× 今泉, 眞之
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| 抄録 | ||||||||||||||||||||||||||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||||||||||||||||||||||||||
| 内容記述 | Geochemical and environmental isotopic aspects of groundwater in a paddy dominant alluvial fan of the Tedori River in Ishikawa Prefecture, Japan were investigated during paddy irrigation and non-irrigation periods. The distribution of stable isotopic compositions of oxygen in shallow groundwater revealed that river-water dominated groundwater flows from the right bank of the river towards northwest, and the contribution of infiltrated river water decreases to the northeast in both irrigation and non-irrigation periods. The river infiltration has a significant effect on decreasing the nitrogen-nitrate concentration in the shallow groundwater along the Tedori River through dilution. The groundwater mixing line (GML), which is a regression line of stable isotopic compositions of oxygen and hydrogen of the shallow groundwater, lies between local meteoric water line (LMWL) and local evaporation line (LEL), determined by linear regression of observed rainwater and paddy water. It is thus deduced that the shallow groundwater is recharged by three sources: rainwater, paddy water and river water. The mixing analysis of three recharge sources suggested the contribution fraction of each source to the shallow groundwater, and indicates that the infiltration of river water can be of great importance in keeping self-reliance of the shallow groundwater and its influence is not limited only to areas around the river. The differences of stable isotope compositions in shallow and deep groundwater clearly imply that both groundwater take different flow paths with little interaction between both aquifers. The age of the deep groundwater are estimated from tritium profile to be pre-1960s unlike young shallow groundwater. Further, age-dating method using 14C activity estimated that deep groundwater was recharged between about 1,000 and 3,000 years before the present. The estimated residence times also justify the difference of flow mechanism between in shallow and deep groundwater. |
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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 211, p. 21-34, 発行日 2011-03-31 |
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| 出版者 | ||||||||||||||||||||||||||||||||||||||
| 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 | |||||||||||||||||||||||||||||||||||||
| 出版者 | ||||||||||||||||||||||||||||||||||||||
| 出版者 | National Agriculture and Food Research Organization, National Institute for Rural Engineering | |||||||||||||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||||||||||||||
| ISSN | ||||||||||||||||||||||||||||||||||||||
| 収録物識別子タイプ | PISSN | |||||||||||||||||||||||||||||||||||||
| 収録物識別子 | 1882-3289 | |||||||||||||||||||||||||||||||||||||
