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Water Quality of the Great Lakes

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Water Quality of the Great Lakes A look at the largest fresh surface water system on Earth using GIS Leah Shimko Environmental Issues PCBs, DDT, fertilizers ... – PowerPoint PPT presentation

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Title: Water Quality of the Great Lakes


1
Water Quality of the Great Lakes
  • A look at the largest fresh surface water system
    on Earth using GIS
  • Leah Shimko

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Environmental Issues
  • PCBs, DDT, fertilizers, untreated human waste,
    phosphate detergents
  • Accelerated eutrophication
  • Low DO
  • Low biodiversity
  • Great Lakes Water Quality Agreement between
    Canada and the U.S. - 1972

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Project Goals
  • Basic Data
  • Watershed Boundaries
  • Political Boundaries
  • Maps of Pollution Levels
  • Select Contaminants
  • Try to show change in quality pre-1972 to
    post-1972

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Major Data Sources
  • GLENDA Great Lakes Environmental Database, EPA
    (tables)
  • GLIN Great Lakes Information Network
    (shapefiles)
  • Canada (.e00 interchange files)
  • 1996-2003
  • P, Cl, N, Si, K, Ca, Alkalinity, Temp.,
    Turbidity, pH, DO

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Is Ontario the best or is another lake Superior?
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Work Remaining
  • Compare data to acceptable levels
  • Effects
  • Pre-1972 data theres still a chance
  • Organization

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Conclusions
  • Levels of pretty much everything are higher in
    Lake Ontario in comparison to Lake Superior,
  • but at least Lake Erie appears to be more of a
    dump than Lake Ontario.

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? 's
Lake Less of a dump than Erie Ontario
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