An intro to trends in water consumption

1. Trends in WaterTrends in Water
ConsumptionConsumption

2. Syllabus linkSyllabus link
An overview of global patterns and trends in
the availability and consumption of water,
including embedded water in food and
manufactured goods

3. ““Water-related problems have been recognizedWater-related problems have been recognized
as the most immediate and serious threats toas the most immediate and serious threats to
humankind”humankind”
Dr. Klaus Töpfer,Dr. Klaus Töpfer,
United Nations Under-Secretary GeneralUnited Nations Under-Secretary General

4. How much freshwater is there on Earth?How much freshwater is there on Earth?

5. All Earth's water, liquid fresh water, and
water in lakes and rivers

6. The Worlds Water CycleThe Worlds Water Cycle

7. Where is the world’s freshwater?Where is the world’s freshwater?

8. How are the world’s freshwaterHow are the world’s freshwater
resources distributed?resources distributed?

10. Although the absolute quantities of freshwaterAlthough the absolute quantities of freshwater
on Earth have remained approximately theon Earth have remained approximately the
same, the uneven distribution of water andsame, the uneven distribution of water and
human settlement continues to create growinghuman settlement continues to create growing
problems ofproblems of freshwater availability andfreshwater availability and
accessibility.accessibility.

11. How much water are weHow much water are we
withdrawing and consuming?withdrawing and consuming?

14. "Freshwater use by sector at the beginning of the 2000s." UNEP/GRID

15. Why water is a global resource?
In most river basins in the world, the
available water resources are partly used to
produce goods that are exported from the
basin for consumption elsewhere.
International trade in commodities implies
long-distance transfers of water in virtual
form.

16. Key TermsKey Terms
 Water FootprintWater Footprint
 Embedded waterEmbedded water
 Maximum sustainable yieldMaximum sustainable yield

17. Embedded waterEmbedded water
A measureof the amount of water used in
the production and transport to market of
food and commodities (also known as the
amount of ‘virtual water’ or ‘water footprint’
attached to a product).
Embedded water may include the use of
local water resources and the use of water
resources in distant places.

20. Water FootprintsWater Footprints
The Water Footprint of a product is the
volume of freshwater appropriated to
produce the product, taking into account the
volumes of water consumed and polluted in
the different steps of the supply chain.

21. Water Footprint of nationsWater Footprint of nations
The water footprint of national consumption
is defined as the total amount of fresh water
that is used to produce the goods and
services consumed by the inhabitants of the
nation. export.

22. Water Footprint of nationsWater Footprint of nations

24. Maximum Sustainable Yield =Maximum Sustainable Yield =
The maximum level of extraction of water that
can be maintained indefinitely for a given
area.
This means there needs to be a balance
between water inputs and outputs …