温暖積雪地における渓流水質変動 Chemistry of Stream Water in a Snowy Temperate Watershed

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Chemical studies of the stream water in a small forested watershed were conducted at Aidzu-Tajima, Fukushima prefecture. The experimental watershed is located under the snowy temperate climate, and has an area of 0.14 km<SUP>2</SUP>. The bedrock of the watershed consists of consolidated sediment formed in the Neogene. The watershed is entirely covered with forest vegetation. Maximum monthly precipitation is observed in summer however, maximum monthly runoff is recorded in snowmelt season. The HCO<SUB>3</SUB><SUP>-</SUP> concentration of stream water is diluted by snow meltwater, and episodic increase of concentrations of Cl<SUP>-</SUP>, NO<SUB>3</SUB><SUP>-</SUP> and SO<SUP>2</SUP><SUB>4</SUB><SUP>-</SUP> is observed during the snowmelt season. The pH of stream water is lower during the snowmelt season than summer and autumn. The ionic composition of stream water is variable according to the seasons. Bicarbonate is the major anion in summer, and the ratio of Cl<SUP>-</SUP>+NO<SUB>3</SUB><SUP>-</SUP>+SO<SUP>2</SUP><SUB>4</SUB><SUP>-</SUP> increases in snowmelt season. The factor analysis is applied to the data matrix of chemistry of stream water. In the winter season, the explained variance of factor 1 which relates to acidity of stream water is 38.7 %, and the explained variance of factor 2 which relates to sea water origin is 28.4 %. Two thirds of variation of stream chemistry is explained by the chemical factor released from snowcover by melting.

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  • 地學雜誌

    地學雜誌 105(1), 1-14, 1996-02-25

    Tokyo Geographical Society

参考文献:  14件中 1-14件 を表示

被引用文献:  12件中 1-12件 を表示

各種コード

  • NII論文ID(NAID)
    10003774331
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    3934801
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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