global water resources-2
DESCRIPTION
TRANSCRIPT
![Page 1: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/1.jpg)
Global Water
RESOURCESCBSE – Std X
As per NCERT geography textbook –
Contemporary India II
![Page 2: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/2.jpg)
THE BLUE PLANET
From outer space, the Earth looks BLUE in colour. That’s because approximately 70% of the Earth is covered with water
![Page 3: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/3.jpg)
Q. Do we have less water today than a million years
ago?
Then
![Page 4: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/4.jpg)
Now
A. The same amount of water
![Page 5: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/5.jpg)
The water cycle
Transpiration
![Page 6: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/6.jpg)
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 conserve water?
![Page 7: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/7.jpg)
DISTRIBUTION OF GLOBAL WATER
![Page 8: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/8.jpg)
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%
![Page 9: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/9.jpg)
Mismatch between regions of large population and available freshwater resources
Fresh Water Stress
2025
Estimates 2 / 3 of the world’s population underwater-stress conditions. 3 billion people affected by water scarcity.
Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/21.htm#21b
![Page 10: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/10.jpg)
The total amount of water in the world is the same, but there are more people wanting to use this water
1940
World population doubled ( increased by 3 bn )
Freshwater use increased more than 4 tim
es
1995
Population and water Resources
There is just not
enough water!!!!
2050
Estimated population increase = 2.7 bn
![Page 11: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/11.jpg)
Every item that we use needs
water for production
CAUSES FOR WATER STRESS
Water evaporation
from reservoirs of large hydro power projects
Domestic bathing, flushing, washing, cooking, drinking…
Extensive farming. High usage of water
Industry Increase demand
for goods
Increase in Population
Water stress!!!!
PowerAgriculture
People require food to eat
![Page 12: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/12.jpg)
Global water use by Sector
Evolution Of Global Water Use
Withdrawal And Consumption By Sector
Accessed in November 2008
Source: http://www.unep.org/dewa/assessments/ecosystems/water/vitalwater/15.htm
![Page 13: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/13.jpg)
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
![Page 14: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/14.jpg)
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
![Page 15: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/15.jpg)
• 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’
![Page 16: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/16.jpg)
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
![Page 17: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/17.jpg)
India – status and projections
1 / 6 of World’s Population
1 / 25 of world’s Freshwater
Resources
Source: TERI
![Page 18: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/18.jpg)
Dumb CharadesA game to check how much you have learnt
Play
![Page 19: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/19.jpg)
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
![Page 20: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/20.jpg)
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.
![Page 21: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/21.jpg)
If the guessers got the right answer in 30 secs, they get 5 points
If the guessers get the right answer in 30 secs, they get 3 points
Otherwise
The chance then goes to Team B and so on.
Rules: No mouthing of words
![Page 22: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/22.jpg)
Round 1Team A –
AgricultureTeam B – Domestic use
Team C – Reservoir
Team D – PopulationTeam E – Industrial
production
![Page 23: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/23.jpg)
Team A – Unequal access
Team B – Over exploitation
Team C – UrbanizationTeam D – Lifestyle
Team E – Lake destruction
Round 2
![Page 24: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/24.jpg)
Round 3
Team A – Fertilizer runoff
Team B – Sewage disposal
Team C – Industrial waste water
Team D – Pesticides
Team E – Domestic waste water
![Page 25: Global Water Resources-2](https://reader036.vdocuments.mx/reader036/viewer/2022081518/549474ecac7959342e8b4bc0/html5/thumbnails/25.jpg)
Team A – Water stressTeam B – Groundwater depletionTeam C – Diseases
Team D – Life threateningTeam E – Slum dwellers
Round 4