Distribution of Oxygen-Deficient Water and Estimation of Its Area in Lake Kitaura

• KOMURO Shunsuke

  Ibaraki Kasumigaura Environmental Science Center

• KITAMURA Tatsumi

  Ibaraki Kasumigaura Environmental Science Center

• OOUCHI Takao

  Ibaraki Kasumigaura Environmental Science Center

• MASUNAGA Eiji

  Global and Local Environment Co-creation Institute, Ibaraki University

• ASAOKA Daiki

  Graduate School of Science and Engineering, Ibaraki University

• AYUKAWA Kazuhiro

  Estuary Research Center, Shimane University

• MIKAMI Yasuhide

  Estuary Research Center, Shimane University

• SEIKE Yasushi

  Estuary Research Center, Shimane University

• YUZAWA Miyuki

  Ibaraki Kasumigaura Environmental Science Center

• FUKUSHIMA Takehiko

  Ibaraki Kasumigaura Environmental Science Center

Bibliographic Information

Other Title

• 北浦における貧酸素水塊の詳細分布と貧酸素水域面積の推計
• キタウラ ニ オケル ヒンサンソスイカイ ノ ショウサイ ブンプ ト ヒンサンソ スイイキ メンセキ ノ スイケイ

Abstract

Detailed distributions of oxygen-deficient water were observed using a high-resolution tow-yo instrument, YODA Profiler, in Lake Kitaura to investigate the formation of oxygen-deficient water. The results of observations showed that oxygen-deficient water widely appeared at a depth of deeper than 4 m, and the dissolved oxygen (DO) concentration in deep areas was particularly low. Furthermore, it was suggested that high phosphorus (PO₄-P) concentrations were eluted from sediments in areas of oxygen-deficient water. The DO concentration at 10 cm above the lake bottom tended to be lower than that at 50 cm above the lake bottom. The oxygen-deficient water in Lake Kitaura is greatly affected by the water depth, which implies that the ratio of the area of oxygen-deficient water can be inferred by lake bathymetry and observed DO profiles. The area of oxygen-deficient water reached 55.9% at 50 cm above the bottom and 63.2% at 10 cm above the bottom of the total area of Lake Kitaura.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 44 (5), 157-164, 2021

  Japan Society on Water Environment

Keywords

• Lake Kitaura
• Dissolved oxygen concentration in the lake bottom water
• Oxygen-deficient water
• Vertical distribution
• Depth of water

Details

• CRID: 1390852282340119040
• NII Article ID: 130008087548
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.44.157
• ISSN: 18813690
• ISSN: 09168958
• NDL BIB ID: 031867602
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I031867602
• Web Site: https://www.jstage.jst.go.jp/article/jswe/44/5/44_157/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed