Water Resources

2. The using up of a resource
3. A large natural or artificial lake used as a source of water supply
5. An area over which rain falls and is collected
7. Occurs when there is a shortage of water to meet the needs of people
9. Being in a weak or unfavourable position
10. Reclaimed water produced by Singapore's Public Utilities Board
11. Arrangement between countries regarding the use of water over a period of time
14. Process of removing salt from sea water
15. Process of disinfecting water using ultraviolet radiation
16. Process of using sand for separating particulate solids from fluids
17. The knowledge, skills, tools that people use to meet their needs
18. 97Percent of Earth's water

1. The recycled water
4. Process of filtrating water to remove larger sized particles and bacteria from the water
6. Occurs when water is contaminated by human activities
8. Careful use of resources to minimize wastage
12. The process of forcing water through a special membrane to remove very small particles, such as bacteria and dissolved salts, from water
13. The setting or conditions in which a particular activity is carried on.
14. The process of water filtration used desalination where water is boiled and water vapour is collected and condensed into fresh water