関東平野北西縁部における窒素流出特性 CHARACTERISTIC OF NITROGEN OUTFLOW FROM MOUNTAIN AREA IN THE NORTHWEST OF KANTO PLAIN

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Author(s)

Abstract

The runoff characteristics of NO<SUB>3</SUB>-N in forested mountain areas located in the northwest of Kanto Plainis investigated by field observation from 2001. The observation consists of two components, one is NO<SUB>3</SUB>-N concentration in mountain stream water and the other is vertical profile of NO<SUB>3</SUB>-N concentration in soil water. It is clarified that the large difference of NO<SUB>3</SUB>-N concentration in mountain stream water exists between the west side and the east side of Tone River. Though NO<SUB>3</SUB>-N concentration in soil water shows the almost similar tendency, vertical profile shows three types that do not exactly correspond to the areal distribution of concentration. By the correlation analysis, there is positive correlation between rainfall events and increase of NO<SUB>3</SUB>-N concentration in mountain stream water in the east side of Tone River, where the concentration is low. On the contrary, no correlation is found out in the west side of Tone River, where the concentration is high. These phenomena correspond to the nitrogen saturation.

Journal

  • PROCEEDINGS OF HYDRAULIC ENGINEERING

    PROCEEDINGS OF HYDRAULIC ENGINEERING (49), 1567-1572, 2005

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130003842099
  • Text Lang
    UNK
  • ISSN
    0916-7374
  • Data Source
    J-STAGE 
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