1. Water Resources

2. What is a Watershed ? Area of land that sheds (moves ) water from the highest to the lowest point.

3. River Systems

4. Texas Rivers

5. Austin’s Colorado River

6. Lake Travis

7. Lake Austin

8. Lady Bird Lake

9. Watershed Map City of Austin What watershed Are we in? Walnut Creek

10. Groundwater Cenote in Mexico

11. Groundwater Water found in the spaces between soil particles and cracks in rocks underground A natural resource that is used for drinking, industry and growing crops Examples: aquifers and springs

12. Groundwater Flow

13. Water Table

14. Porosity and Permeability How fast water can flow through a material Depends on the particle size. The larger the particle size the more permeable the material.

15. Porosity and Permeability

16. Impermeable Layer A layer of material which water does not pass; also known as a confining layer Examples: Clay and shale(natural), concrete (man-made)

17. Impervious Cover

18. Land Use Changes effect the water cycle

19. Aquifer An underground geological formation to store and yield water

20. Aquifer

21. The Hydrologic Cycle and Groundwater

22. Edwards Aquifer

23. Aquifer San Antonio 1895

24. Ogallala Aquifer

25. Spring

26. Barton Springs Pool

27. Barton Springs

28. Recharge Zone Layer below the surface that has holes where water can go through to the Aquifer. Example: Karst Limestone

29. Features of Karst Terrain

30. Karst Terrain Landscape shaped by the dissolution of soluble rock San Salvador, Bahamas Karst Landscape France

31. The Environmental Implications of Karst Terrain

32. Cave Formation Animation of Cave Formation Innerspace Cavern Georgetown, Texas

33. Cave Deposition Natural Bridge Cavern New Braunfels, Texas Carlsbad Cavern New Mexico Dissolved calcium carbonate is precipitated creating cave formations

34. Cave Features

35. How much of the Earth’s water supply is available to drink? Less than 1 %!