planetary resources
DESCRIPTION
Planetary Resources. Water. “Water is about quantity, quality, space and time. Whether you have a big problem or not depends entirely on where you live.” Source: Ian Cluckie Professor of Hydrology and Water Management, University of Bristol. Key Questions. - PowerPoint PPT PresentationTRANSCRIPT
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Planetary ResourcesWater
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“Water is about quantity, quality, space and time. Whether you have a big problem or not depends entirely on where you live.”
Source: Ian Cluckie Professor of Hydrology and Water Management, University of Bristol
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Key Questions• Nearly one billion inhabitants do not
have access to safe drinking water: why is access to this essential resource so unequal?
• How do societies use and develop their water resources?
• Why is it necessary to use water more sustainably?
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97.2% Ocean & saltwater
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Freshwater ResourcesFreshwater rivers and lakes
Groundwater
Ice and Snow cover in mountainous regions
30%Groundwater
70% Ice and Snow
cover
Freshwater is effectively a finite resource since only about 1% of freshwater is easily available for human use.
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Water Scarcity Map
Source: Food and Agriculture Organization of the United Nations (FAO)
Water scarcity: supply of water per person falls below 1000m3/year. An imbalance of supply and demand. A high rate of use compared to available supply, especially if the remaining supply is difficult or costly to tap.
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Water Poverty Index 2002
Are the Water Scarce and Water Poor areas in the world the same? Why or why not?
Water poverty: The condition of not having access to sufficient water, or water of an adequate quality, to meet one’s basic needs. (=economic scarcity)
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Physical and Economic Water Scarcity
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I. Unequal Access to WaterA. Water - an indispensable resource
which is unequally spread out– Necessary to life and irreplaceable– Various uses: • household/industrial/agricultural (17% of
farmland uses irrigation)
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Global Water Use
70%Irriga-tion
20% Industry
10% Domestic Use
Source: World Water Assessment Program (WWAP)
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H2O distribution• 9 countries hold 60% of freshwater reserves in the
world (Brazil, Russia, U.S.A., Canada…)• 40% of developing countries have arid land (mostly in
Africa and Asia – Sahara, Arabic Peninsula…)
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Seasonal access to water• Water access is also unequally
spread out over the year– Several climate regions have dry
seasons like in Mediterranean zones (e.g. Spain) and monsoons (e.g. India)
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B. Water Access in function of development levels
• Especially dependent on a society’s ability to create appropriate infrastructure and develop its territory
• Consumption is related to standard of living of populations
• A Californian uses 38X more water than a Cambodian even though water is more abundant in Cambodia
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Global Water Footprint
The water footprint indicates how much is required by consumers- and in an increasingly globalised world, the footprint
of someone in a country like the UK will not be just local as so many products using water will have been produced elsewhere!
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Daily Domestic Water use per capitaCountry Liters per capita per day
1. Canada 778
2. United States 616
3. Australia 605
4. Korea 552
5. Italy 483
6. Japan 373
7. Spain 342
8. Portugal 308
9. Mexico 300
10. Turkey 238
11. France 232
12. Czech Republic 213
13. Germany 151
14. Poland 149
15. India 139
16. United Kingdom 139
17. Denmark 114
18. China 95
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Water Footprint• Water Footprint WebsiteBefore consulting the website, how many
liters of water do you think are needed to make the following:
1 liter beer?1 liter milk?1 kg of cotton?1 kg of cane sugar?1 kg of wheat bread?1 kg of rice?1 kg of beef?
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The relation between consumption and water use
• "The interest in the water footprint is rooted in the recognition that human impacts on freshwater systems can ultimately be linked to human consumption, and that issues like water shortages and pollution can be better understood and addressed by considering production and supply chains as a whole. Water problems are often closely tied to the structure of the global economy. Many countries have significantly externalized their water footprint, importing water-intensive goods from elsewhere. This puts pressure on the water resources in the exporting regions, where too often mechanisms for wise water governance and conservation are lacking. Not only governments, but also consumers, businesses and civil society communities can play a role in achieving a better management of water resources."
• Going back to the website, compare China, Japan and the U.S. for their externalized water footprint…
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Access to drinking water• Very unequal• WHO estimates that 2.4 B
inhabitants do not have access to potable water in 2013 and in 40 countries, more than 50% of the population is deprived of drinking water–Mostly countries in subsaharan Africa
and southern Asia
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Water Demand• Increases with urbanization– Esp in the south
• In mostly urbanized societies– Higher level of consumption– Problems of water management and
waste management• Crucial issue in precarious areas (slums)
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Conclusion• Water access an issue of– natural conditions– Economic reasons– Social reasons