わが国の渓流水質の広域調査  [in Japanese] Stream water chemistry in Japan  [in Japanese]

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Abstract

<p>To overview the stream water chemistry in Japan, we conducted systematic stream water sampling and chemical analyses as the Japan-Wide Stream Monitoring (JWSM) 2003. The total numbers of 1278 samples from head water streams from all over Japan were analyzed in this study. The Japanese average values and concentrations of E.C., pH, Cl<sup>-</sup>, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, Anion deficit (HCO<sub>3</sub><sup>-</sup>),</p><p>Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup> and Ca<sup>2+</sup> were 7.01mS/m, 6.84, 120μmol/l, 25.7μmol/l, 60.1μmol/l, 341μeq/l, 216μmol/l, 6.1μmol/l, 16.2μmol/l, 53.7μmol/l, 133μmol/l, respectively. Stream water chemistry calculated at every prefecture showed regional distributions, background level of natural stream chemistry was quite different depended on the area in Japan. NO<sub>3</sub><sup>-</sup> concentrations showed most distinctive difference, Saitama prefecture (113μmol/l) was more than 13 times higher than Hokkaido prefecture (8.2μmol/l).</p>

Journal

  • Journal of Japanese Association of Hydrological Sciences

    Journal of Japanese Association of Hydrological Sciences 36(3), 145-149, 2006-08-31

    THE JAPANESE ASSOCIATION OF HYDOROLOGICAL SCIENCES

References:  3

Cited by:  11

Codes

  • NII Article ID (NAID)
    10017953404
  • NII NACSIS-CAT ID (NCID)
    AA11123427
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    13429612
  • NDL Article ID
    8516655
  • NDL Source Classification
    ZM44(科学技術--地球科学--海洋・陸水・火山)
  • NDL Call No.
    Z15-251
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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