MathBench > Environmental Science

What's in your Watershed?

Putting it all together

It’s time to put it all together and use what’s you’ve learned about watersheds and water quality. 

  1. Predict which of these 3 sites will the worst water quality
    (>400 cells / 100 mLs).
  2. Confirm your prediction by sampling and counting enterococci.
  3. Identify the factors that affect water quality at each site.


Think carefully about where sources of contamination might be coming from, the amount of impervious surface, and the size of the stream. When you make your prediction, check it in the applet below.

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So were you right? What do you think each of the factors had to do with water quality?

Sources of contamination

Stream size Two of the sites were second order.

Impervious surface.





If you want a printer-friendly version of this module, you can find it here in a Microsoft Word document. This printer-friendly version should be used only to review, as it does not contain any of the interactive material, and only a skeletal version of problems solved in the module.