1. GROUNDWATER

2. WHAT IS THE CHART SHOWING?

3. Water table Zone of aeration Zone of saturation Water table

4. What will make the water table rise? http://techalive.mtu.ed u/meec/module06/Th eWaterTable.htmhttp://techalive.mtu.ed u/meec/module06/Th eWaterTable.htm What will make the water table lower?

6. Groundwater affects surface water

7. Permeability

8. permeability http://techalive.mtu.edu/meec/module06/P ermeability.htmhttp://techalive.mtu.edu/meec/module06/P ermeability.htm

9. AQUIFERS Ogallala Aquifer!Needs to be below water table in a permeable layer Ogallala aquifer- ”fastest disappearing aquifer in the world”

10. WELLS Needs to be in an aquifer http://techalive.mtu.edu/meec/module06/WellDrilling.htm

11. PUMPING WELLS Creates cone of depression Lowers water table Creates a “drawdown”

12. Formation of a cone of depression in the water table

13. Cone of depression

14. subsidence Pumping out gw lowers the surface Surface Slowly sinks

15. Artesian wells Flows to the surface naturally Under pressure “sandwiched” between two impermeable layers

17. Flowing vs. non flowing

18. GROUNDWATER POLLUTION SOURCES –Septic tanks –Landfills –Fertilizers/pesticides –Underground storage tanks (gas stations)

20. Septic tanks

21. landfills

22. Hot springs and geysers Groundwater heated by magma reaches the surface

23. Steamboat, CO

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