降水による地下水水質の変動  [in Japanese] Compositional change of groundwater caused by precipitation  [in Japanese]

Access this Article

Search this Article

Author(s)

Abstract

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 Ca<sup>2+</sup> and alkalinity, represents a simple dilution of ground-water by penetrating rainwater. The other, characteristic of NO<sub>3</sub><sup>-</sup> 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.

Journal

  • Chikyukagaku

    Chikyukagaku 18(1), 15-19, 1984

    The Geochemical Society of Japan

Codes

  • NII Article ID (NAID)
    110008679754
  • NII NACSIS-CAT ID (NCID)
    AN00141280
  • Text Lang
    JPN
  • ISSN
    0386-4073
  • NDL Article ID
    3003575
  • NDL Source Classification
    ME34;M092
  • NDL Source Classification
    ZM41(科学技術--地球科学)
  • NDL Call No.
    Z15-645
  • Data Source
    NDL  NII-ELS  J-STAGE 
Page Top