Effect of Hydrogeochemical Properties of Watersheds on Inland Water Acidification. Comparison of Acid-neutralization Due to Chemical Weathering between Acidified and Non-acidified Watersheds.

• IKEDA Hideshi

  Abiko Rsearch Laboratory, Central Research Institute of Electric Power Industry

• MIYANAGA Yoichi

  Abiko Rsearch Laboratory, Central Research Institute of Electric Power Industry

Bibliographic Information

Other Title

• 陸水の酸性化における地質・水文条件の影響　　鉱物の化学的風化による中和作用の流域間比較
• リクスイ ノ サンセイカ ニ オケル チシツ スイモン ジョウケン ノ エイキョウ コウブツ ノ カガクテキ フウカ ニ ヨル チュウワ サヨウ ノ リュウイキ カン ヒカク
• Comparison of Acid-neutralization Due to Chemical Weathering between Acidified and Non-acidified Watersheds
• 鉱物の化学的風化による中和作用の流域間比較

Abstract

In future, freshwaters in Japan are likely to become acidified by increasing acid deposition in eastern Asia. In order to predict the long-term acidification of freshwaters, it is necessary to evaluate acid neutralization mechanism in Japanese watersheds.<br>In this paper, an estimation method for acid-neutralization by chemical weathering is proposed, and applied to acidified and non-acidified watersheds in order to compare acid-neutralization mechanism. The principal results are :<br>(1) Japanese non-acidified watersheds receive approximately the same amount of acidic deposition as an acidified watershed in U.S.A..<br>(2) In Japanese non-acidified watersheds, acid deposition is neutralized by chemical weathering of primary minerals. On the other hand, in the acidified watershed, chemical weathering rates of primary minerals are much smaller than those in Japanese non-acidified watersheds. Therefore, acid deposition is not neutralized in this watershed.<br>(3) Typical properties of watersheds vulnerable to acidification are :<br>1) Dominant primary minerals in soil and bedrock are stable against acid deposition.<br>2) Soil thickness (weathering zone) is relatively small.<br>3) The ratio of chemical weathering ratio to acidic deposition is relatively small.

Journal

• Journal of Japan Society on Water Environment

  Journal of Japan Society on Water Environment 22 (8), 655-662, 1999

  Japan Society on Water Environment

Keywords

• acid deposition
• watershed
• inland water
• chemical weathering
• neutralization

Details

• CRID: 1390282680056571776
• NII Article ID: 10004453030
• NII Book ID: AN10372439
• DOI: 10.2965/jswe.22.655
• COI: 1:CAS:528:DyaK1MXmvFSjtr0%3D
• ISSN: 18813690
• ISSN: 09168958
• NDL BIB ID: 4834502
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4834502
• Web Site: https://www.jstage.jst.go.jp/article/jswe/22/8/22_8_655/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed