Geography-Water Resources

4. water that is much cleaner than used water.
6. the use of advanced membrane technology to further treat used water to produce a very high grade water.
9. the problem of water constraint in Singapore.
10. an area over which rain falls and is collected.
11. the careful use of resources to ensure that wastage is kept to a minimum.
12. the process of forcing water through a special membrane to remove very small particles, such as bacteria and dissolved salts, from water.
14. the process of removing salt from sea water.
15. the process where larger particles and bacteria are removed.
17. being in a week or unfavourable position.
19. a reason for water constraint.

1. method that makes use of technology to increase water supply.
2. the Ministry of the Environment and Water Resources is also known as.
3. fresh water which is stored in rivers, streams and lakes.
5. one way to encourage water conservation.
7. when impurities are removed from waste water through a treatment process.
8. reclaimed water is also known as.
13. the process of water filtration used in desalination where water is boiled and the water vapour is collected and condensed into fresh water.
16. other name for the natural water agency.
18. fresh water that can be found deep underground.
20. the knowledge, skills and tools that people use to meet their needs.