引田湾に隣接する森林流域からの物質流出機構と流出負荷量

• 田村 隆雄

  徳島大学 大学院ソシオテクノサイエンス研究部

• 端野 道夫

  徳島大学 大学院ソシオテクノサイエンス研究部

• 末永 慶寛

  香川大学 工学部安全システム建設工学科

• 星川 豪

  徳島大学 大学院先端技術科学教育部

書誌事項

タイトル別名

• SOLUTE RUNOFF SYSTEM AND RUNOFF LOAD FROM THE FORESTED BASIN ADJACENT TO HIKETA BAY

抄録

Hiketa bay is located in southwest of Harima-Nada where the red tide happens frequently. For estimating the solute runoff system to Hiketa bay from a surrounding forested basin, water quality observation was executed in Umayado river basin adjacent to the bay. The following findings were obtained. (1) The seasonal change of the stream water quality was not seen, as for the solute like NO₃^-. It is thought that the paucity of precipitation caused it. (2) Rain that exceeds 100mm influences the stream water quality system of about one month after the rainfall event. (3) The dam in the upstream decreases the concentration of NO₃^- and SO₄^2-. However the concentration of SiO₂ and T-Fe were not influenced. (4) The amount of SiO₂ supplied from the forested basin in a year equals the amount of SiO₂ that always exits in Hiketa Bay. (5) The heavy rain caused by the seasonal rain front and the typhoon is the key role of SiO₂ and T-Fe runoff system in the basin.

収録刊行物

• 水工学論文集

  水工学論文集 51 1165-1170, 2007

  公益社団法人 土木学会

キーワード

• forested basin adjacent to bay
• solute runoff system
• runoff load
• mass balance of bay

詳細情報

• CRID: 1390001205171139712
• NII論文ID: 130003842379
• DOI: 10.2208/prohe.51.1165
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可