water resources

1. A supply of water
4. A process of removing undesirable chemicals, materials, and biological contaminants from raw water
6. Is a natural or artificial lake, storage pond or impoundments from a dam which is used to store water
8. Process of making a product or service available
11. To revise the terms of (a contract) so as to limit or regain excess profits gained by the contractor
12. Process of filtering water to remove larger sized particles and bacteria from the water
15. Cleaning of sea water
18. Arrangement between 2/more countries regrading the supply and use of water resources over a specific period of time
19. Process when water is boiled and the water vapour is collected and condensed into fresh water
20. The knowledge,skills and tools that people use to meet their needs

2. 1 of the measures to conserve water supply
3. Ensuring that wastage is kept to a minimum
4. 1 of the method of desalination
5. Is a process to change materials into new products to prevent waste of potentially useful materials
7. Weak/unfavourable position
9. Water shortage problem
10. An area over which rainfalls and is collected
13. The process of forcing water through a special membrane to remove very small particles
14. A protected area of importance for wildlife, flora, fauna or features of geological or other special interest
16. An outdoor water-use restriction is a ban or other lesser restrictions put into effect that restricts the outdoor use of water supplies
17. Process of converting sea water into fresh water by removing salt from the sea water