Across
- 2. having spaces or pores that allow water or other substances to pass through
- 4. an area where surface water soaks into the ground and reaches an aquifer
- 5. the boundary between the zone of aeration and the zone of saturation in an aquifer
- 6. landscaping using plants adapted to dry conditions
- 8. pollution that comes from many places over a large area
- 9. not allowing water or other substances to pass through
- 10. spongelike formation of rock, sand, or gravel that holds water
- 12. a network of connected streams and rivers
- 15. the buildup of salts in the surface layers of soil
- 19. all of the land area that supplies water to a particular river system
- 20. a channel dug into an aquifer to reach groundwater
- 21. process of removing salt from seawater; also called desalinization
- 22. pollution that comes from a specific location
- 24. an artificial lake where water for human use is stored
- 26. water that has been used in households, businesses, industries, or public facilities and drained or flushed down the pipes, as well as the polluted runoff from streets and storm drains
Down
- 1. a disease-causing organism
- 3. fresh water found below Earth’s surface
- 7. fresh water found on Earth’s surface
- 11. the process of moving water from its source to places where humans can use it
- 13. relatively pure water; water with few dissolved salts
- 14. rapid growth of algae in an area that can cover the surface of the water and block sunlight from reaching plants below
- 16. pollution of a body of water as a result of human activity; more specifically artificial nutrient enrichment
- 17. a method of wastewater disposal
- 18. a harmful algal bloom caused by algae that produce reddish pigments
- 23. water that flows over land and collects in a stream or river
- 25. an obstruction placed in a river or stream to block its flow
