1. Warm-up 10/12 1. As an environmental engineer, where would you recommend locating a drinking water well? Why? 2. Which soil sample had the greatest risk of transferring harmful chemicals into a drinking water aquifer? Why 3. What are some factors you would consider when locating your drinking water well?

2. How exactly DOES water “run-off?”

3. Remember our WATER CYCLE?

4.  volunteers?

5. Most precipitation falls where?

6.  Most precipitation falls in the ocean.

7. Most precipitation falls where?  Most precipitation falls in the ocean. Why?

8. Most precipitation falls where?  Most precipitation falls in the ocean. Why?  Nearly ¾ our planet is covered by oceans.

9. Does this precipitation remain freshwater?

10.  No, it is absorbed by the ocean & turns salty itself.

11. Does this precipitation remain freshwater?  No, it is absorbed by the ocean & turns salty itself.  Why does fresh water become salt water in the ocean?

12. Does this precipitation remain freshwater?  No, it is absorbed by the ocean & turns salty itself.  Why does fresh water become salt water in the ocean?  Water is the ____________ _________.

13. Does this precipitation remain freshwater?  No, it is absorbed by the ocean & turns salty itself.  Why does fresh water become salt water in the ocean?  Water is the UNIVERSAL SOLVENT….it loves to ___________ all sorts of stuff like salt.

14. Does this precipitation remain freshwater?  No, it is absorbed by the ocean & turns salty itself.  Why does fresh water become salt water in the ocean?  Water is the UNIVERSAL SOLVENT….it love to dissolve all sorts of stuff like salt.

16. Where does this water go?

17. A lot of it seeps into the ground through __________ rock,

18. A lot of it seeps into the ground through permeable rock,

19. …into aquifers we can access via _______ & springs.

20. …into aquifers we can access via (by) wells & springs.

22. But what about the rest of our rain that hits land & doesn’t go underground?  RUN-OFF!

24. Drainage/river basins allow water to flow down from highlands called DIVIDES

25. Drainage/river basins allow water to flow down from highlands called DIVIDES.

26.  There, gravity takes control & water moves towards a big river…

27. Drainage/river basins allow water to flow down from highlands called DIVIDES.  There, gravity takes control & water moves towards a big river out to sea.

28. Divides also separates watersheds from each other

29. Show map North Carolina has 17 river basins.

30. 17 different paths that run-off DRAINS back into the ocean. North Carolina has 17 river basins.

31. And each river basin is made of smaller WATERSHEDS.

32.  Here’s one river/drainage basin:

33. And each river basin is made of smaller WATERSHEDS.  This is a smaller watershed.

34. And each river basin is made of smaller WATERSHEDS.  Here’s another small watershed.

35. And each river basin is made of smaller WATERSHEDS.  Another smaller watershed…

36. How many smaller watersheds are in this river/drainage basin?

37.  At least 9, maybe more?

38. How about us?  Whoa, that’s a lot of watersheds.

39. Bailey Middle is located right near a divide.