a picture of a drop of water going to a stream from groungwater?

Answer 1

Here's one that shows the recharge zone. Recharging is what happens when water percolates down into the aquifer to become groundwater.

http://pasture.ecn.purdue.edu/~epados/ground/images/recharge.gif

Here's another:
http://www.epa.gov/bioiweb1/images/hydrocyc.gif

And another:
http://www.wsu.edu/~forda/percolation.html