Water Underground

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Across
  1. 3. soils and rocks that allow the water to pass through
  2. 7. when water passes through soil layers
  3. 8. area that is not full of water
  4. 10. area that is not full of water
  5. 11. soil horizon that is impermeable
  6. 12. what watershed we live in
  7. 14. top of saturation zone
  8. 16. forms where the river ends its journey
  9. 17. dug below the water table
  10. 18. largest delta on the east coast
Down
  1. 1. high area between two drainage basins
  2. 2. river and tributaries run into it
  3. 4. water that doesn't permeate in the soil
  4. 5. largest delta in the United States
  5. 6. when water soaks into the ground
  6. 9. only 3% found on Earth
  7. 13. area where sediments deposit after heavy rains
  8. 15. like an underground lake