1. Hydrology

2. Earth’s Water

3.  Renewable resources can be replenished in a human life span.

4. Hydrologic Cycle

5. Why is hydrology so important?

6. Groundwater

7. Introduction to Groundwater The zone of saturation occurs where water completely fills the open spaces in the soil and rock. The upper limit of this zone is called the water table. The zone above the water table is called the zone of aeration.

8. Saturation

9. Clay in the ground?

10. Clay acts as an aquitard

11. Aquifer  It isn’t a lake, but water that is trapped in the rock and soil underground.

12. Aquifer

13.  Aquifers can be used as ground water to supply fresh water.

14. Vocabulary  Porosity- how much water the soil can hold  Permeability- the rock’s ability to allow water to pass through  Porosity- how much water the soil can hold  Permeability- the rock’s ability to allow water to pass through

15. Importance of being permeable and porous  That soil will allow water to pass through and accumulate

16. Drainage Basin  The area that water from streams and rivers accumulat es in

17. Continental Divide

19. US. Groundwater Usage

20. Rising Water Tables

21. Falling Water Tables

22. Infiltration Capacity  how much rain can ground absorb before water runs off

23. Dangers of low infiltration capacity