Across
- 1. rate that water permeates into an aquifer
- 3. one of the largest aquifers in the world
- 5. inefficient method of irrigation of digging troughs next to plants
- 7. water underground available for humans
- 9. aquifer recharges quickly
- 10. filling of space
- 12. most efficient method of irrigation, but expensive
- 14. easy method of irrigation of covering field in water
- 16. empty spaces in soil
- 17. build up of salt in the soil
- 19. water stored in pores of permeable sedimentary rock
- 21. blocked aquifer, long-term recharge rate
- 22. water transfer along the surface causing soil erosion
- 23. travel downwards into the soil
Down
- 2. water use for livestock and irrigation
- 4. poking holes in soil to get air, water and nutrients into the soil
- 6. too much water for plants
- 8. loss of land fertility due to soil salinization and desertification
- 11. water transfer from liquid to gas
- 13. process of supplying water to land
- 15. growth of deserts
- 17. efficient, but must pay for equipment and energy to pump water
- 18. water use at home
- 20. water use for power plants