雨と風が湖色の季節変化を異常にした可能性について

• 牧 陽之助

  岩手大学人文社会科学部生物学教室

書誌事項

タイトル別名

• A Possibility that Heavy Rainfalls with Strong Winds Altered the Seasonal Color Change in the Water of Lake Matsuo-Goshikinuma, in Northern Honshu, Japan.

抄録

In July of 1991, the water in Lake Matsuo-Goshikinuma turned from blue to yellowish red. This change in the color of the water was different from the usual seasonal change, namely blue in the spring, whitish blue in the summer, and yellowish red in the autumn and the winter. In order to explain this irregular change, the relationships among the color, temperatures of the water, dissolved oxygen concentrations, rainfalls, and wind for five years were studied. It became apparent that in June and July of 1991, there were repeated heavy rainfalls over 50mm⋅day^-1 accompanied by strong winds. On the other hand, the stagnation of the oxygen-poor (less than 1mg O2⋅1^-1) water of the lake was interrupted by oxygen-rich (over 2mg O₂⋅1^-1) water in the upper layer of the water. These findings made it possible to conclude that heavy rainfalls with strong winds led to the increase in the dissolved oxygen concentrations of the water which resulted not only in an oxidation of hydrogen sulfide but also in an oxidation of ferrous ions. The resulting iron hydroxide caused the yellowish-red color of the water in July of 1991.

収録刊行物

• 陸水学雑誌

  陸水学雑誌 56 (3), 227-231, 1995

  日本陸水学会

キーワード

• dissolved oxygen
• rainfall
• wind
• watercolor

詳細情報

• CRID: 1390282679037002624
• NII論文ID: 130003644983
• DOI: 10.3739/rikusui.56.227
• ISSN: 18824897
• ISSN: 00215104
• 本文言語コード: ja
• 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