Trends in River Flow and Population Dynamics Ryan Birmingham Note - - PowerPoint PPT Presentation

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trends in river flow and population dynamics
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Trends in River Flow and Population Dynamics Ryan Birmingham Note - - PowerPoint PPT Presentation

Nov 26, 2022 186 likes •382 views

Trends in River Flow and Population Dynamics Ryan Birmingham Note on Unlabeled Figure Order Atlanta Buford GA 280 Norcross Roswell Peachtree Creek (not Chattahoochee) Why This Topic The 1996 Olympics The population trend in the county

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Trends in River Flow and Population Dynamics

Ryan Birmingham

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Note on Unlabeled Figure Order

Atlanta Buford GA 280 Norcross Roswell Peachtree Creek (not Chattahoochee)

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Why This Topic

The 1996 Olympics The population trend in the county Fulton: 600k in 1990, 1.1 m in 2000 The water!

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The Data

Chattahoochee river flow (sampled about once every 15 min, over 1990 to 2000) Peachtree Creek, same data

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Summary of Data

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Autocorrelation

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Xcorr

Atlanta Buford GA 280 Norcross Roswell Peachtree Creek

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Fitting Curves, single oscillation

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Fitting Curves, ‘fourier4’

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Manual attempt to remove seasonality

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Removing ‘fourier4’ model

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Year Boxplot

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Month Boxplot

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Linear model (flow~year+month)

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Response to Month

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Response to Year

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Conclusions

Clearly Not Definitive Seems that there is a suggestion of a trend Flow Fluctuates Wildly

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Discussion

Lots of Outliers Unable to validate consistently Unable to find detailed-enough data on weather and Lake Lanier activity to remove that component. New Question: What happened to other water sources during 1990 to 2000?