Water Review Crossword

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Across
  1. 3. natural nutrient enrichment of a river where it flows into a lake or ocean
  2. 4. top of saturated zone
  3. 6. removal of salt from water
  4. 9. land area that drains into a river
  5. 14. water with a salt content too high for drinking but not as salty as the ocean
  6. 17. bacteria in the roots of legumes convert N2 into ammonia
  7. 18. property right allowing use of surface or ground water
  8. 19. water that has a low salt content
  9. 21. process used to kill bacteria and viruses in waste water treatment
Down
  1. 1. water that is fit to drink
  2. 2. oil or natural gas extracted from shale deposits
  3. 5. lowering of the water table caused by well pumping
  4. 7. causes limited life span of large dams
  5. 8. chemical needed to sustain life
  6. 10. most water efficient method of watering plants
  7. 11. household waste water from showers and laundry
  8. 12. underground, water-bearing, geologic structure
  9. 13. single nutrient that controls primary productivity
  10. 15. legislation that limits water pollution
  11. 16. tank used to store water
  12. 20. dense growth of algae caused by large limiting nutrient influx