Geography-Water Resources

4. fresh water that can be found deep underground.
7. being in a week or unfavourable position.
9. the process of water filtration used in desalination where water is boiled and the water vapour is collected and condensed into fresh water.
12. an arrangement between two or more countries regarding the supply and use of water resources over a specific period of time.
18. one way to encourage water conservation.
19. the careful use of resources to ensure that wastage is kept to a minimum.
20. the knowledge, skills and tools that people use to meet their needs.

1. the use of advanced membrane technology to further treat used water to produce a very high grade water.
2. reclaimed water is also known as.
3. water that is much cleaner than used water.
5. the process of removing salt from sea water.
6. a reason for water constraint.
8. an area over which rain falls and is collected.
10. the problem of water constraint in singapore.
11. when impurities are removed from waste water through a treatment process.
13. the process of forcing water through a special membrane to remove very small particles, such as bacteria and dissolved salts, from water.
14. method that makes use of technology to increase water supply.
15. the process where larger particles and bacteria are removed.
16. fresh water which is stored in rivers, streams and lakes.
17. the Ministry of the Environment and Water Resources is also known as.