1. Game on! Please get out something to write with. Please read the board.

2. Which way is the water running? (which trick did you use?)

6. Does being downstream matter?

8. How can we meet water needs? Conservation Use more surface water (build more dams) Use aquifers (groundwater) Transfer water from other areas Desalinate ocean water

10. Houston Water sources: Lake Livingston (806 MGD) Lake Conroe (60 MGD) Lake Houston (150 MGD)

12. 1. Screening 2. Coagulation with alum; chlorine treatment 3. Mixing 4.settling tank – flocs sink to bottom 5. Filtration 6. disinfection with chlorine, UV radiation or ozone/ fluoride added

13. Does being downstream matter?

14. How can we meet water needs? Conservation Use more surface water (build more dams) Use aquifers (groundwater) Transfer water from other areas Desalinate ocean water

15. Water has mass and fills an aquifer through a recharge zone

17. Consequences of using our ground water Overdraft – taking more water OUT of an aquifer than is recharging IN to the aquifer (What would happen to your bank account if you did this?)

18. Subsidence – sinking of land due to aquifer overdraft

19. Brownwood subdivision Baytown

20. Brownwood 1953

21. Brownwood 1978

22. Baytown Nature Center today

23. Houston is switching to just surface water to protect the city from further subsidence. Overdraft leads to subsidence

24. Texas Aquifers in trouble!

25. Check for understanding  What clues on a map will show which direction is downstream?  How are an aquifer and a recharge zone related?  How are a watershed and a river related?  How are subsidence and overdraft related?  Why does it matter that our drinking water supplies are downstream of Dallas?  Describe the tradeoffs between using surface water and using ground water.

26. HOMEWORK TONIGHT Read both articles on the HUB Complete Cause and Effect Thinking Map (add 10 boxed and you’ll be ready for the quiz)