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Stream Water Quality as Influenced by Land Use Patterns in the Kakioka Basin, Japan
Author(s) -
Hirose T.,
Kuramoto N.
Publication year - 1981
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1981.00472425001000020012x
Subject(s) - drainage basin , water quality , hydrology (agriculture) , drainage , environmental science , land use , agricultural land , canonical correlation , structural basin , human settlement , geography , geology , ecology , mathematics , biology , geomorphology , statistics , cartography , geotechnical engineering , archaeology
The effect of land use patterns on stream water quality was studied in the agricultural landscape of the Kakioka Basin, Japan. Stream water was sampled from 52 sites three times in 1979, and the concentration of 10 inorganic ions (NO 3 ‐N, NO 2 ‐N, NH 4 ‐N, PO 4 ‐P, K, Na, Ca, Mg, Cl, and SO 4 ‐S) was analyzed. Land uses (forests, croplands, and settlement areas) in the drainage areas for respective sites were read from land use maps. Partial correlations showed that stream water quality was affected by the fraction of the drainage area in respective land uses. The drainage area had no correlation with the concentration in all ions except PO 4 ‐P. The concentration of NH 4 ‐N, Na, and SO 4 ‐S correlated with the fraction in croplands, and the concentration of NO 3 ‐N, NO 2 ‐N, PO 4 ‐P, K, Ca, Mg, and Cl correlated with the fraction in settlement area. Canonical correlation analysis revealed the first and second canonical correlation coefficients to be highly significant. The first canonical variate indicated the effect of increasing croplands and settlements with the increase of drainage area, and the second variate indicated the different effects of croplands and settlements on the stream water quality.