Hydrological Effects on Relationships Between δ15N of River Nitrate and Land Use in a Rural River Basin, Western Japan

Hydrological Effects on Relationships Between δ15N of River Nitrate and Land Use in a Rural River Basin, Western Japan

This study aimed to examine how the relationship between δ¹⁵N of nitrate (δ¹⁵NNO₃) in rivers and land use within a river basin changes with varying hydrological conditions. This information would aid in identifying the dominant source contributing to increased nitrate concentrations in rural rivers....

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Veröffentlicht in:River research and applications 2015-06, Vol.31 (5), p.639-649
Hauptverfasser: Ide, J, Somura, H, Nakamura, T, Mori, Y, Takeda, I, Nishida, K
Format: Artikel
Sprache:eng
Schlagworte:
anthropogenic and natural sources
basins
correlation
diffuse pollution
forests
hilly and mountainous area
land use
nitrates
nitrogen
residential areas
river water
rivers
stable isotope
stable isotopes
watersheds
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Zusammenfassung:This study aimed to examine how the relationship between δ¹⁵N of nitrate (δ¹⁵NNO₃) in rivers and land use within a river basin changes with varying hydrological conditions. This information would aid in identifying the dominant source contributing to increased nitrate concentrations in rural rivers. For this, δ¹⁵NNO₃ in river water was investigated monthly in the five subbasins of the Hii River basin (area: 911 km²), western Japan, for 1 year and 3 months. There were significant correlations (p 
ISSN:1535-1459
1535-1467
DOI:10.1002/rra.2756