influence of topography on the stream N concentration in the Tanzawa Mountains, Southern Kanto District, Japan

The water chemistry of 51 headwater streams was studied in the Tanzawa Mountains, western fringe of Southern Kanto Plain, Japan. The relationships to soil N processes and catchment topography were also evaluated using a geographic information system with fine-scale map data. The average concentratio...

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Bibliographic Details
Published in:Journal of forest research 2008-12, Vol.13 (6), p.380-385
Main Authors: Fujimaki, Reiji, Kawasaki, Akiyuki, Fujii, Yoshikazu, Kaneko, Nobuhiro
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Catchment topography
Catchments
Creeks & streams
Forest ecosystems
Forest watershed
Forestry
Forestry Management
Geographic information system (GIS)
Geographic information systems
Life Sciences
Mountains
Nitrate
Nitrification
Plant Ecology
Plant Sciences
Remote sensing
Short Communication
Topography
Tree Biology
Water chemistry
Water quality
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Summary:The water chemistry of 51 headwater streams was studied in the Tanzawa Mountains, western fringe of Southern Kanto Plain, Japan. The relationships to soil N processes and catchment topography were also evaluated using a geographic information system with fine-scale map data. The average concentration of total dissolved N was 0.74 mg-N L⁻¹, of which 95% consisted of NO₃ ⁻-N. Stream N concentrations were not different among bedrock geologies and among vegetations of the catchments. Stream NO₃ ⁻-N marginally correlated to soil nitrification. Stream NO₃ ⁻-N also tended to be high in areas with steep and south-facing slopes. These results imply that N transport from Tanzawa forest ecosystems is related to hydrological and biological processes associated with catchment topography.
ISSN:1341-6979
1610-7403
DOI:10.1007/s10310-008-0089-1