Application of 85 Kr dating to groundwater in volcanic aquifer of Kumamoto Area, Japan

N. Momoshima, F. Inoue, T. Ohta, Y. Mahara, J. Shimada, R. Ikawa, M. Kagabu, M. Ono, K. Yamaguchi, Shinji Sugihara, M. Taniguchi

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

Groundwater age was determined by 85 Kr/Kr specific activity of gases dissolved in groundwater at Kumamoto Area, in which newly developed Kr extraction system and liquid scintillation counting technique for 85 Kr were applied. Apparent mean residence times observed were 8.2 ± 0.7 years and 20.7 ± 0.6 years for the groundwater taken from a well at the recharge area and that from an artesian borehole at the discharge area, respectively showing a consistent age trend estimated from the observed groundwater flow system of Kumamoto Area and also that determined using environmental tritium. Similar mean residence times of 85 Kr and tritium were observed at the discharge area but the mean residence time of 85 Kr at the recharge area was younger compared to that of tritium, probably due to mixing of river water containing recent 85 Kr high in concentration into groundwater flow coming from the northern upland's recharge area. The mean residence time of the groundwater flow coming from northern upland area and a traveling time of the groundwater between two sampling points were estimated by a simple model assuming mixing the river water with the groundwater and a piston flow between two sampling points.

元の言語英語
ページ(範囲)761-767
ページ数7
ジャーナルJournal of Radioanalytical and Nuclear Chemistry
287
発行部数3
DOI
出版物ステータス出版済み - 3 1 2011

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Geochronology
Groundwater
Aquifers
Japan
Groundwater flow
Tritium
Rivers
Sampling
Water
Scintillation
Boreholes
Pistons
Scintillation Counting
Gases
Liquids

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

これを引用

Application of 85 Kr dating to groundwater in volcanic aquifer of Kumamoto Area, Japan . / Momoshima, N.; Inoue, F.; Ohta, T.; Mahara, Y.; Shimada, J.; Ikawa, R.; Kagabu, M.; Ono, M.; Yamaguchi, K.; Sugihara, Shinji; Taniguchi, M.

:: Journal of Radioanalytical and Nuclear Chemistry, 巻 287, 番号 3, 01.03.2011, p. 761-767.

研究成果: ジャーナルへの寄稿記事

Momoshima, N, Inoue, F, Ohta, T, Mahara, Y, Shimada, J, Ikawa, R, Kagabu, M, Ono, M, Yamaguchi, K, Sugihara, S & Taniguchi, M 2011, ' Application of 85 Kr dating to groundwater in volcanic aquifer of Kumamoto Area, Japan ' Journal of Radioanalytical and Nuclear Chemistry, 巻. 287, 番号 3, pp. 761-767. https://doi.org/10.1007/s10967-010-0821-0
Momoshima, N. ; Inoue, F. ; Ohta, T. ; Mahara, Y. ; Shimada, J. ; Ikawa, R. ; Kagabu, M. ; Ono, M. ; Yamaguchi, K. ; Sugihara, Shinji ; Taniguchi, M. / Application of 85 Kr dating to groundwater in volcanic aquifer of Kumamoto Area, Japan :: Journal of Radioanalytical and Nuclear Chemistry. 2011 ; 巻 287, 番号 3. pp. 761-767.
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abstract = "Groundwater age was determined by 85 Kr/Kr specific activity of gases dissolved in groundwater at Kumamoto Area, in which newly developed Kr extraction system and liquid scintillation counting technique for 85 Kr were applied. Apparent mean residence times observed were 8.2 ± 0.7 years and 20.7 ± 0.6 years for the groundwater taken from a well at the recharge area and that from an artesian borehole at the discharge area, respectively showing a consistent age trend estimated from the observed groundwater flow system of Kumamoto Area and also that determined using environmental tritium. Similar mean residence times of 85 Kr and tritium were observed at the discharge area but the mean residence time of 85 Kr at the recharge area was younger compared to that of tritium, probably due to mixing of river water containing recent 85 Kr high in concentration into groundwater flow coming from the northern upland's recharge area. The mean residence time of the groundwater flow coming from northern upland area and a traveling time of the groundwater between two sampling points were estimated by a simple model assuming mixing the river water with the groundwater and a piston flow between two sampling points.",
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AU - Kagabu, M.

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AU - Sugihara, Shinji

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