If 70% of the Earth’s surface is covered with water and the absolute quantities of water has not changed over the years, why are we talking of water stress in the recent past? This presentation deals with water availability and increasing water stress around the world.

1. Global Water
RESOURCES
CBSE – Std X
As per NCERT geography textbook – Contemporary
India II

2. THE
BLUE PLANET
From outer space, the Earth looks
BLUE in colour. That’s because
approximately 70% of the Earth is
covered with water

3. Q. Do we have less water
today than a million years
ago?
Then

4. Now
A. The same
amount of water

5. The water cycle
Transpiration

6. Is there a
water problem?
Approximately 70% of the Earth’s surface
is covered with water.
The absolute quantity of water has not
changed over the years.
Then why are we talking of a water crisis?Why do we need to conservewater?

7. ISTRIBUTION OF GLOBAL WATER

8. If all the world’s water could fit into a bucket
Water available for drinking would be less than a teaspoon
Sustainable freshwater supply for human use = 0.01%
Recommended activity - A drop of water
Salt Water = 97.5%

9. Mismatch between regions of large population and available freshwater resources
Fresh Water Stress
By 2025
2 / 3 of the world’s population estimated to be underwater-stress conditions.
3 billion people may be affected by water scarcity.
Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/21.htm#21b

10. The total amount of water in the world is the same, but there are more people wanting
to use this water
194
0
World population doubled ( increased by 3 bn )
Freshwater use increased more than 4 times
199
5
Population and water Resources
There is just not
enough water!!!!
2050
Estimated population increase = 2.7 bn

11. Every item
that we use needs
water for production
CAUSES FOR WATER
STRESS
Water evaporation
from reservoirs of large
hydro power projects
Domestic
Extensive farming.
High usage of water
Industry
Increase in Population
Water stress!!!!
Power
Agriculture
People require
food to eat
Increased demand
for goods
bathing, flushing, washing,
cooking, drinking…

12. Global water use by Sector
Evolution Of Global Water Use
Withdrawal And Consumption By Sector
Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/15.htm, accessed November 2008

13. India, with more than a billion people, needs a lot of water to grow food for its population
Agriculture
Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/15.htm

14. Run off
from agricultural
fields
Untreated
municipal sewage
Air pollutants
Dissolve in
rainwater
It’s not just increased consumption…
For more details refer to the presentation on ‘Water pollution’.
Increasing pollution of freshwater sources
( surface and groundwater )
Untreated
industrial
wastes

15. • Lakes, tanks and ponds being destroyed. Land filled for
construction purposes.
• Unsustainable extraction of groundwater in urban areas, affecting
groundwater quality.
• Receive sewage that cannot be handled by sewage
treatment plants.
• Disposal of solid and liquid wastes
above or into groundwater
aquifers.
Additional stress in urban
areas
For more details refer to the presentation on ‘Water resources of our city’

16. SO…
Is there a Water
Problem?
Yes, there definitely is.
There is a greater demand for freshwater
Freshwater resources are being polluted and
are therefore unfit for consumption
Skewed distribution of population and freshwater
resources leads to unequal access

17. ndia – status and projections
1 / 6 of World’s Population
1 / 25 of world’s Freshwater
Resources
Source: TERI

18. Dumb Charades
A game to check how much you have learnt
Play

19. Divide the class into 5 teams.
Team A selects 2 people who will guess
the answer.
These 2 people turn their face to the wall or
go out of the room, so that they can’t see
the clue.
Play

20. Team A have to act out the clue for the 2
guessers.
Either all members of Team A can act it out
(very boisterous, but all children are
involved) or a representative is selected to
do the acting.
The other members of Team A
(and the rest of the class) see the clue.

21. If the guessers got the right answer in 30 secs,
they get 5 points
If the guessers get the right answer in 60 secs,
they get 3 points
Otherwise 
The chance then goes to Team B and so on.
Rules: No mouthing of words

22. Round 1
Team A –
Team B –
Team C –
Team D –
Team E –
Ready ?
Agriculture
Domestic use
Reservoir
Population
Industrial production

23. Team A –
Team B –
Team C –
Team D –
Team E –
Round 2
Unequal access
Over exploitation
Urbanization
Lifestyle
Lake destruction

24. Round 3
Team A – Fertilizer runoff
Team B – Sewage disposal
Team C – Industrial waste water
Team D – Pesticides
Team E – Domestic waste water

25. Team A – Water stress
Team B – Groundwater depletion
Team C – Diseases
Team D – Life threatening
Team E – Slum dwellers
Round 4