This primary land-use in this area is housing developments.
Notice that the nitrogen levels here are high, but not as high as in Agriculture (many homeowners fertilize their lawns)
Select Indicator
D.O. for the Top Display and
Select Indicator
Water Temp for the Bottom Display.
Click on Change Display to see new graphs.
Q8. Describe how D.O. and Water Temperature are related.
(hint: click on draw Scatterplot to better view this relationship)
Compared to a forest, housing developments have many fewer trees. Fewer trees mean less shade and higher air temperatures which lead to higher water temperatures. The higher the water temperature the less oxygen the water can hold.
When oxygen levels drop below 5 mg/L fish are stressed.
Q9. Which season of the year and which days(from graph) would you
expect fish to be most stressed?
Why?
Run-off from warm driveways, streets and roofs further increase water temperature in streams and can cause a very sudden temperature shock after a rain storm.
Read about the Suggested Improvement,
then click on Implement Improvement to better manage the land-use.
Q10. Describe how D.O. has been improved (for evidence refer to the graph).
To finish your Tour, click on "10. Further Exploration"
(in menu frame).