Water Demand

Which of these irrigation methods is NOT a wasteful use of water?

• Trench irrigation
• Overhead sprinklers
• Drip irrigation
• Flood irrigation

True or false: The US pays farmers for all irrigation costs

• True
• False

'The supply of water to land or crops to help growth'. Which key word does this define?

• Agriculture
• Irrigation
• Chanelling
• Water balance

Which of these is the most expensive?

• Overhead sprinklers
• Drip irrigation
• Flood irrigation
• Trench irrigation

Which term is used to describe the farming of fish/shell-fish? 

• Marineculture
• Hydroculture
• Aguaculture
• Aquaculture

Why do thermal power plants use large quantities of water?

• A cooling device
• Hydration of workers
• Diluting of chemicals
• hydro-electric power

How can water used in power stations then pollute river systems?

• Chemical pollution
• Thermal pollution

Approximately what % of industrial waste is put back into the river system untreated?

• 35
• 40
• 55
• 70

How many litres of water per person per day is seen as the basic requirement?

• 30
• 40
• 50
• 60

What is 'potable water'?

• Drinking water
• Chlorinated water
• Untreated water
• Water polluted with chemical waste