How Many People Can an Aquifer Support?
ES1406  Further Changes in the Aquifer Level

The graph below now shows how the water level in the Arapahoe aquifer changed from 1960 through 1990. With population increasing and annual rainfall remaining relatively constant, what changes might have been responsible for raising the water level of the aquifer after 1960?

USGS GROUND WATER ATLAS of the UNITED STATES
 

9. Hypothesize about what might have changed to bring the aquifer water level back up again after 1960. Describe how you might test your hypothesis.


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