Water Resources

4. crops grown in fertilized water and no soil.
6. an area where there is no longer any groundwater.
8. surfaces
10. intrusion when the pumping of fresh water out of a well is faster than the recharge. Near coastal areas this can cause salt water to infiltrate the aquifer.
11. the input process of water percolating into an aquifer.
13. small spaces found within permeable layers of rock and sediment where water is found.
14. low amounts of nutrients such as phosphorous and nitrogen
15. similar to a levee but built to prevent ocean waters from flooding adjacent land.
16. a barrier that runs across a river or stream to control the flow of water.
17. canals or ditches used to carry water from one location to another.
19. well from which water flows under natural pressure without pumping.

1. the uppermost level at which the water in an area fully saturates the rock or soil.
2. a moderate level of productivity
3. a generally flat area of land next to a river or stream.
5. an aquifer surrounded by a layer of impermeable rock or clay.
7. removing the salt from salt water to obtain fresh water.
9. an aquifer that is simply porous rock covered by soil.
12. high levels of productivity
18. an enlarged bank built up on each side of the river.