Hydrogen and Oxygen Isotopic Ratios in Precipitation, River and Groundwaters in the Eastern area of the Hiei mountains

• KOBAYASHI Masao

  Division of Natural Science, Osaka Kyoiku University

• KITAOKA Kouichi

  Beppu Geopthermal Research Laboratory, Faculty of Science, Kyoto University

• YOSHIOKA Ryuma

  College of Technology, Toyama Prefectural University

• HORIUCHI Kimiko

  School of Social Information Study, Otsuma Women's University

• SASAI Emi

  Otsu municipal office

Bibliographic Information

Other Title

• 比叡山地東麓一帯の降水・河川水および地下水の水素・酸素の同位体比
• ヒエイ サンチ トウロク イッタイ ノ コウスイ カセンスイ オヨビ チカスイ

Abstract

Hydrogen and oxygen isotopic ratios of precipitations, river waters and groundwaters were analyzed to obtain the fundamental data for studying the process of groundwater flowing into Lake Biwa. Monthly precipitations were collected from March 1994 to August 1995 and water samples of river and groundwaters were also taken in March and August 1995 in the eastern area of the Hiei mountains. The isotopic ratios of precipitations show seasonal variations having a sawtoothed shape with a minimum in July and a maximum in November. The weighted means of δD and δ¹⁸O values for precipitation are -52.6‰ and -8.6‰ near the summit, and -50.4‰, -7.7‰ at the low land. Alutitude isotopic effect per 100m elevation is -0.4‰ for δD and -0.2‰ for δ¹⁸O. The meteoric water lines are expressed as δD=8δ¹⁸O+16 near the summit and as δD=8δ¹⁸O+18 at the low land. Hydrogen and oxygen isotopic ratios in river and groundwater samples show no remarkable changes with time. Altitudinal effect for river and groundwater as well as that of precipitation having a slight difference between the mountain area (-0.1‰/100m for δ¹⁸O) and the low land area ( -0.3‰/100m).

Journal

• Journal of Japanese Association of Hydrological Sciences

  Journal of Japanese Association of Hydrological Sciences 27 (3), 143-150, 1997

  THE JAPANESE ASSOCIATION OF HYDOROLOGICAL SCIENCES

Keywords

• hydrogen and oxygen isotopic ratio
• precipitation
• river water
• groundwater
• Hiei mountains

Details

• CRID: 1390564238060807808
• NII Article ID: 10003711766
• NII Article ID: 10004483074
• NII Book ID: AA11123427
• DOI: 10.4145/jahs.27.143
• ISSN: 18837166
• ISSN: 13429612
• NDL BIB ID: 4292629
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4292629
• Web Site: https://www.jstage.jst.go.jp/article/jahs/27/3/27_143/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed