Water requirements for human health and agriculture
- Human health
- just to survive for drinking = 3 liters/(person*day)
- for hygeine and sanitation = 50 liters
- in 2000, 55 countries below this level
- ref
- Agriculture
- water efficiency for different crops
- water used for an amount of crop production
- kg crop/m3 of water
- depends on many variables such as humidity, crop type, wind
- track water flows - figure 9
- example numbers
- desert 0.4 g per kg (0.4 grams of plant per kg of water)
- short grass prarie = 1.1
- forests 1 to 1.8
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