Statistical Analysis of Trends in the Red River Over a 45 Year Period

selkirk
dspc
POINTS: RECORDED DATA
LINE: STREAMFLOW−RELATED ANOMALY + TREND
CONCENTRATION, AS BASE−10 LOGARITHM
2 2.5 3 3.5
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CONCENTRATION, AS BASE−10 LOGARITHM
2 2.5 3 3.5
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1975 1980 1985 1990 1995 2000 2005 2010
1975 1980
Y + TREND
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selkirk
Figure dspc A.92: Specific Conductance concentrations (points) and streamflow related
anomaly + trend (line)
CONCENTRATION, CONCENTRATION, AS BASE−10 BASE−10 LOGARITHM LOGARITHM
2 2 2.5 2.5 3 3 3.5 3.5
POINTS: SEASONALLY ADJUSTED AND FLOW−ADJUSTED DATA
LINE: TREND
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POINTS: SEASONALLY ADJUSTED AND DETRENDED DATA
LINE: ANNUAL STREAMFLOW−RELATED ANOMALY
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1975 1980 1985 1990 1995 2000 2005 2010
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RESIDUAL
−4 −3 −2 −1 0 1 2 3 4
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2000 2005 2010
1975 1980 1985 1990 1995 2000 2005 2010
ADJUSTED DATA
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Figure A.93: Specific Conductance Flow Adjustments — Seasonally adjusted and
0 1 2 3 4
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POINTS: PARMA MODEL RESIDUALS
LINE: LOWESS SMOOTH WITH F= 0.5
de-trended data (points) and annual streamflow-related anomaly (line).
SIDUAL
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