Herbicides in Metro Atlanta Streams and Rivers Data Analysis Cristal Moon.

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Presentation transcript:

Herbicides in Metro Atlanta Streams and Rivers Data Analysis Cristal Moon

Rivers Suwanee Creek Nickajack Creek Chattahoochee River

Questions Do herbicide levels have yearly trends? Are they related to other factors in surface water?

Variability of two Pesticides in Chattahoochee

Levels for Nickajack Creek

Levels for Suwanee Creek

Least Squares Regression + is levels, green line is regression, red bars are 95% confidence levels Error variance= Correlation Coefficient= P-value= Error variance= Correlation Coefficient= P-value=0.1016

Normal? Chi2=4,337,300 Chi2inv= Chi2>Chi2inv, therefore distribution is not normal Chi2= , Chi2inv= Chi2>Chi2inv, therefore distribution is not normal

Discharge vs. Herbicides Correlation Coefficient: P-value= Correlation Coefficient: P-value=

Specific Conductance vs. Herbicides Correlation Coefficient= P-value= Correlation Coefficient= P-value=

pH Correlation Coefficient= P-value= Correlation Coefficient= P-value=

Principle Component Regression Green is Least-Squares, Blue is Reduced Major Axis, Black is PCR

LSSA Significant frequencies (in Hz) at Corresponding powers: Significant frequencies (in Hz) at Corresponding powers:

Conclusions Annual increase in herbicides early in year Linear increase over time Levels not related to pH or discharge Specific Conductance somewhat correlated

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