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

05102500 RED RIVER OF THE NORTH AT EMERSON
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POINTS: RECORDED DATA
LINE: STREAMFLOW−RELATED ANOMALY + TREND
CONCENTRATION, AS BASE−10 LOGARITHM
0 0.5 1 1.5
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CONCENTRATION, AS BASE−10 LOGARITHM
0 0.5 1 1.5
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● 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
1955 1960 19
500 RED RIVER OF THE Figure NORTH A.50: AT EMERSON, Dissolved MANITOBA Potassium concentrations (points) and streamflow related
dpot
POINTS: SEASONALLY ADJUSTED AND FLOW−ADJUSTED DATA
anomaly + trend (line)
LINE: TREND
+ TREND
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CONCENTRATION, CONCENTRATION, AS BASE−10 BASE−10 LOGARITHM LOGARITHM
0 0 0.5 0.5 1 1 1.5 1.5
POINTS: SEASONALLY ADJUSTED AND DETRENDED DATA
LINE: ANNUAL STREAMFLOW−RELATED ANOMALY
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1955 1960 1965 1970 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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1955 1960 19
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1995 2000 2005 2010
1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
DJUSTED DATA
Figure A.51: Dissolved Potassium Flow Adjustments — Seasonally adjusted and
POINTS: PARMA MODEL RESIDUALS
LINE: LOWESS SMOOTH WITH F= 0.5
de-trended data (points) and annual streamflow-related anomaly (line).
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IDUAL
0 1 2 3 4
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