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- Created by: Freya Woolley
- Created on: 23-04-14 11:23
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- Sustainable Water Supply
- The Issues
- There is likely to be a world water gap between rising demands and falling supplies of what is a finite resource.
- The increase in demand for water will be due to:
- Global population growth
- Economic development
- Rising standards of living
- This increase could be 56% by 2050, even if sustainable strategies are followed by 20%
- Conflicts
- 1. The increase in demand for water could lead to conflict between users at a variety of scales.
- 2. Physical Scarcity- water supplies are spread unevenly with 2/3 of the world's population livinng in areas that recieve 25% of the world's rainfall
- 3. Economic Scarcity- Development of supplies is limited by lack of capital and technology to pay for this exploitation- even though there is sufficient water available.
- Inbalance in usage- developed countries use up to 10 times more water per head than developing countries- but pay less.
- Human actions fragment water supplies and cause pollution.
- Scarcity- when annual supply of water per person drops below 1,000m3
- Physical scarcity- when more than 75% of areas blue water flow is being closed.
- Economic scarcity- when development of adequate blue water sources is limited by lack of capital and technology.
- Water stress- when there is less than 1,700m3 of water per person per year.
- By 2050 estimated 50% of world's population will be water vulnerable
- Less than 2,500m3 of water per person per year
- By 2050 climate change may covert vulnerability to stress and scarcity.
- stress (affecting 4 billion people) amd scarcity (a further 1.5 billion)
- What physical factors determine the supply of water?
- How do human activities influence water supply and demand?
- How can water supply and demand be managed sustainably?
- Demand
- Case Studies
- Can sustaiable water supplies be maintained in the furture?
- The Issues
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