1. GROUNDWATER

3. Water table Zone of aeration- pore spaces filled with air Zone of saturation- pore spaces filled with water Dividing line is called the water table Zone of aeration Zone of saturation Water table

4. Groundwater affects surface water

5. Groundwater entering surface water

6. Permeability

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

8. Groundwater speed http://techalive.mtu.edu/meec/module04/G roundwaterSpeed.htmhttp://techalive.mtu.edu/meec/module04/G roundwaterSpeed.htm

9. AQUIFERS Ogallala Aquifer!Saturated layer (below water table) Need interconnected pores (High permeability) Ogallala aquifer- ”fastest disappearing aquifer in the world”

10. WELLS Need permeable layer Under water table http://techalive.mtu.edu/meec/module06/WellDrilling.htm

11. PUMPING WELLS Creates cone of depression Lowers water table

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

13. Water stealing

14. subsidence

15. Artesian wells Flow to the surface naturally Under pressure “sandwiched between two impermeable layers Well must be below intake

18. Wikipedia’s version of artesian- is this correct?

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

21. Septic tanks

22. landfills

23. Natural contaminates Calcium, magnesium creates “hard water’ Will not suds up Creates white film in hot water pipes Irons creates bad taste 

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

25. Steamboat, CO

27. OLD FAITHFUL With an error of 10 minutes, Old Faithful will erupt 65 minutes after an eruption lasting less than 2.5 minutes or 91 minutes after an eruption lasting more than 2.5 minutes.

28. http://highered.mcgraw- hill.com/sites/0072402466/student_view0/ chapter11/animations_and_movies.html#http://highered.mcgraw- hill.com/sites/0072402466/student_view0/ chapter11/animations_and_movies.html#