降水による地下水水質の変動

• 糸山 東一

  香川大学教育学部化学教室

書誌事項

タイトル別名

• Compositional change of groundwater caused by precipitation
• コウスイ ニ ヨル チカスイ スイシツ ノ ヘンドウ

抄録

Groundwater samples were collected from three drilled wells situated in a forest area, after ordinary and heavy precipitation events. Two patterns of concentration change of dissolved species were observed after ordinary precipitation event. One, examplified by the behavior of Ca²⁺ and alkalinity, represents a simple dilution of ground-water by penetrating rainwater. The other, characteristic of NO₃^- and silica, indicates a temporary increase in concentrations of these species. The nitrate was derived from dissolution of dry fallout, and the silica from dissolution of amorphous aluminosilicates formed by weathering of silicate rocks. After a heavy precipitation, the pattern of concentration change can be explained by a strong dilution of groundwater by rainwater. Only silica concentration remained virtually unchanged, thus supporting leaching of silica from aluminosilicates by descending rainwater.

収録刊行物

• 地球化学

  地球化学 18 (1), 15-19, 1984

  一般社団法人日本地球化学会

詳細情報

• CRID: 1390001205743449472
• NII論文ID: 110008679754
• NII論文ID: 10012496857
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.18.15
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3003575
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3003575
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • Crossref
• 抄録ライセンスフラグ: 使用不可