水温躍層における貧酸素水の成長機構について

• 道奥 康治

  神戸大学工学部建設学科

• 小谷 英之

  神戸大学大学院自然科学研究科

• 佐々木 茂太

  神戸大学大学院自然科学研究科

• 西口 祐輝

  神戸大学大学院自然科学研究科

書誌事項

タイトル別名

• MECHANISM OF DEOXYGENATION IN RESERVOIR METALIMNION

抄録

It was observed in a eutrophic reservoir that metalimnion was deoxygenated and kept anaerobic during heating season while hypolimnion was successfully aerated. It was investigated in this study what brought the metalimnion deoxygenation. The fact that dissolved oxygen decreased faster in the sidearm than in the main reservoir suggests that oxygen consumption by the sediments might be one of the deoxygenation mechanisms. The additional mechanism of deoxygenation is considered to be decomposition of organic matters that were densely suspended in the metalimnion. The field data suggested that dissolved nutrients, metals, organic matters, etc. were released from the bed sediments at which the anaerobic metalimnetic water was touching. This reduction process may generate horizontal intrusion of the anaerobic and polluted waters from the sidearm into the main reservoir.

収録刊行物

• 水工学論文集

  水工学論文集 49 1177-1182, 2005

  公益社団法人 土木学会

キーワード

• Reservoir eutrophication
• deoxygenation
• decomposition of organic matters
• hypolimnetic aeration

詳細情報

• CRID: 1390001205170314624
• NII論文ID: 130003842028
• DOI: 10.2208/prohe.49.1177
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可