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