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

Global water resources_ Schools India Water Portal_2011

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Global water resources- Have these reduced that we face water scarcity today

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  • 1. Global WaterRESOURCES CBSE Std X As perNCERTgeography textbook Contemporary India II

2. THEBLUEPLANET From outer space, the Earth looks BLUE in colour. Thats 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 sameamount of water 5. Thewater cycle Transpiration 6. Is there awater problem? Approximately70%of the Earths 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? 7. DISTRIBUTION OF GLOBAL WATER 8. If all the worlds water could fit into a bucket Water available for drinking would be less than a teaspoonSustainable freshwatersupply 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 FreshWaterStress By 2025 2 / 3 of the worlds 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 1940 World population doubled (increased by 3 bn) Freshwater use increased more than4 times 1995 PopulationandwaterResources There is just not enough water!!!! 2050 Estimatedpopulation increase=2.7 bn 11. Every itemthat we use needswater for production CAUSES FOR WATERSTRESS Water evaporationfrom reservoirs of largehydro power projects Domestic Extensivefarming. High usage of water Industry Increase in PopulationWaterstress!!!! Power Agriculture People requirefood to eat Increased demandfor goods bathing, flushing, washing,cooking, drinking 12. Global water use bySector 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
    • Dissolvein
    • rainwater

Its 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 cannotbe handled by sewage
    • treatment plants.
    • Disposal of solid and liquid wastes
    • above or into groundwater
    • aquifers.

Additionalstressin urban areas For more details refer to the presentation on Water resources of our city 16. SO Is there aWater Problem? Yes ,there definitely is. There is agreater demand for freshwater Freshwater resources are beingpolluted and are therefore unfit for consumption Skewed distribution of population and freshwater resourcesleads to unequal access 17. India statusandprojections 1 / 6of Worlds Population 1 / 25of worlds FreshwaterResources 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.These2people turn their face to the wall or go out of the room, so that they cant 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 ofTeam 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 pointsOtherwise The chance then goes toTeam Band 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. Round 2 Team A Team B Team C Team D Team E Unequal access Over exploitation Urbanization Lifestyle Lake destruction 24. Round 3

  • Team EDomestic waste water

Team AFertilizer runoff Team BSewage disposal Team CIndustrial waste water Team DPesticides 25. Round 4 Team A Water stress Team B Groundwater depletion Team C Diseases Team D Life threatening Team E Slum dwellers